Release Notes for the Catalyst -S, 2960-SF, 2960-C, 2960-Plus, and 3560-C Switches, Cisco IOS Release 15.2(2)E - Cisco
Release Notes for the Catalyst -S, 2960-SF, 2960-C, 2960-Plus, and 3560-C Switches, Cisco IOS Release 15.2(2)E
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Release Notes for the Catalyst -S, 2960-SF, 2960-C, 2960-Plus, and 3560-C Switches, Cisco IOS Release 15.2(2)E and Later
June 6, 2016
Cisco IOS Release 15.2(2)E and later runs on Catalyst 2960-S, 2960-SF, 2960-C, 2960-Plus and 3560-C switches and on Cisco EtherSwitch service modules.
The Catalyst 2960-S supports switch stacking. Unless otherwise noted, the term
switch refers to a standalone switch and not to a switch stack.
The Catalyst 3560-C switch does not support the IP services image.
These release notes include important information about Cisco IOS Release 15.2(2)E and any limitations, restrictions, and caveats that apply to the releases.Verify that these release notes are correct for your switch:
If you are installing a new switch, see the Cisco IOS release label on the rear panel of your switch.
If your switch is on, use the
show version privileged EXEC command. See the .
If you are upgrading to a new release, see the software upgrade filename for the software version. See the .
You can download the switch software from this site ( users with a login password):
Table 1 Catalyst 2960-S and 2960-P Switches Supported
Catalyst 2960S-48FPD-L
48 10/100/1000 Power over Ethernet Plus (PoE+) ports (PoE budget of 740 W) and 2 SFP+ module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-48LPD-L
48 10/100/1000 PoE+ ports (PoE budget of 370 W) and 2 SFP+ module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-24PD-L
24 10/100/1000 PoE+ ports (PoE budget of 370 W) and 2 SFP+ module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-48TD-L
48 10/100/1000 ports and 2 SFP+ module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-24TD-L
24 10/100/1000 ports and 2 SFP+ module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-48FPS-L
48 10/100/1000 PoE+ ports (PoE budget of 740 W) and 4 SFP module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-48LPS-L
48 10/100/1000 PoE+ ports (PoE budget of 370 W) and 4 SFP module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-24PS-L
24 10/100/1000 PoE+ ports (PoE budget of 370 W) and 4 SFP module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-48TS-L
48 10/100/1000 ports and 4 SFP module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-24TS-L
24 10/100/1000 ports and 4 SFP module slots
Cisco IOS Release 12.2(53)SE1
Catalyst 2960S-F48FPS-L
48 10/100 PoE+ ports (PoE budget of 740 W) and 4 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F48LPS-L
48 10/100 PoE+ ports (PoE budget of 370 W) and 4 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F48TS-L
48 10/100 ports and 4 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F24PS-L
24 10/100 PoE+ ports (PoE budget of 370 W) and 2 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F24TS-L
24 10/100 ports and 2 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F48TS-S
48 10/100 ports and 2 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst 2960S-F24TS-S
24 10/100 ports and 2 SFP module slots
Cisco IOS Release 15.0(2)SE
Catalyst C2960P-48PST-L
48 10/100 ports with PoE, 2 1000BASE-T and 2 SFP uplinks, LAN Base image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24PC-L
24 10/100 ports with PoE, 2 1000BASE-T or SFP uplinks, LAN Base image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24LC-L
24 10/100 ports, 8 ports with PoE, 2 1000BASE-T or SFP uplinks, LAN Base image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-48TC-L
48 10/100 ports, 2 1000BASE-T or SFP uplinks, LAN Base image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24TC-L
24 10/100 ports, 2 1000BASE-T or SFP uplinks, LAN Base image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-48PST-S
48 10/100 ports with PoE, 2 1000BASE-T and 2 SFP uplinks, LAN Lite image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24PC-S
24 10/100 ports with PoE, 2 1000BASE-T or SFP uplinks, LAN Lite image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24LC-S
24 10/100 ports, 8 ports with PoE, 2 1000BASE-T or SFP uplinks, LAN Lite image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-48TC-S
48 10/100 ports, 2 1000BASE-T or SFP uplinks, LAN Lite image
Cisco IOS Release 15.0(2)EZ
Catalyst C2960P-24TC-S
24 10/100 ports, 2 1000BASE-T or SFP uplinks, LAN Lite image
Cisco IOS Release 15.0(2)EZ
Table 2 Minimum Hardware Requirements
233 MHz minimum
1024 x 768
Windows 2000, XP, Vista, and Windows Server 2003.
Internet Explorer 6.0 or 7.0, and Firefox up to version 27, with JavaScript enabled.
The device manager verifies the browser version when starting a session and does not require a plug-in.
You cannot create and manage switch clusters through the device manager. To create and manage switch clusters, use the command-line interface (CLI) or the Network Assistant application.
When creating a switch cluster or adding a switch to a cluster, follow these guidelines:
When you create a switch cluster, we recommend configuring the highest-end switch in your cluster as the command switch.
If you are managing the cluster through Network Assistant, the switch with the latest software should be the command switch.
The standby command switch must be the same type as the command switch. For example, if the command switch is a Catalyst 2960-C switch, all standby command switches must be Catalyst 2960-C switches.
For additional information about clustering, see
Getting Started with Cisco Network Assistant and
Release Notes for Cisco Network Assistant (not orderable but available ), the software configuration guide, the command reference, and the Cisco EtherSwitch service module feature guide.
Cisco IOS 12.2(50)SE and later is only compatible with Cisco Network Assistant (CNA) 5.0 and later. You can download Cisco Network Assistant from this URL:
For more information about Cisco Network Assistant, see the
Release Notes for Cisco Network Assistant .
The Cisco IOS image is stored as a
bin file in a directory that is named with the Cisco IOS release. A subdirectory contains the files needed for web management. The image is stored on the system board flash device (flash:).
You can use the
show version privileged EXEC command to see the software version that is running on your switch. The second line of the display shows the version.
You can also use the
filesystem
: privileged EXEC command to see the directory names of other software images that you might have stored in flash memory.
The upgrade procedures in these release notes describe how to perform the upgrade by using a combined tar file. This file contains the Cisco IOS image file and the files needed for the embedded device manager. You must use the combined tar file to upgrade the switch through the device manager. To upgrade the switch through the command-line interface (CLI), use the tar file and the
archive download-sw privileged EXEC command.
Table 3 Cisco IOS Software Image Files
c2960-lanbasek9-mz.152-2.E.bin
Catalyst 2960 LAN Base cryptographic image file and device manager files.
c2960-lanbasek9-tar.152-2.E.tar
Catalyst 2960 LAN Base cryptographic image file and device manager files.
c2960-lanlitek9-mz.152-2.E.bin
Catalyst 2960 LAN Lite cryptographic image file and device manager files.
c2960-lanlitek9-tar.152-2.E.tar
Catalyst 2960 LAN Lite cryptographic image file and device manager files.
c-universalk9-mz.152-2.E.bin
Catalyst 2960-C image with all supported universal image features and Web-based device manager.
c-universalk9-tar.152-2.E.tar
Catalyst 2960-C image with all supported universal image features and Web-based device manager.
cex-universalk9-mz.152-2.E.bin
Catalyst 2960-C image with all supported universal image features and Web-based device manager.
cex-universalk9-tar.152-2.E.tar
Catalyst 2960-C image with all supported universal image features and Web-based device manager.
c2960s-universalk9-mz.152-2.E.bin
LAN Base and LAN Lite cryptographic image file and device manager files.
c2960s-universalk9-tar.152-2.E.tar
LAN Base and LAN Lite cryptographic image file and device manager files.
c2960s-universalk9-mz.152-2.E.bin
LAN Base and LAN Lite cryptographic image file and device manager files.
c2960s-universalk9-tar.152-2.E.tar
LAN Base and LAN Lite cryptographic image file and device manager files.
Before upgrading your switch software, make sure that you have archived copies of the current Cisco IOS release and the Cisco IOS release to which you are upgrading. You should keep these archived images until you have upgraded all devices in the network to the new Cisco IOS image and until you have verified that the new Cisco IOS image works properly in your network.
Cisco routinely removes old Cisco IOS versions . See Product Bulletin 2863 for more information:
You can copy the bin software image file on the flash memory to the appropriate TFTP directory on a host by using the copy flash: tftp:
privileged EXEC command.
Note Although you can copy any file on the flash memory to the TFTP server, it is time consuming to copy all of the HTML files in the tar file. We recommend that you download the tar file
and archive it on an internal host in your network.
You can also configure the switch as a TFTP server to copy files from one switch to another without using an external TFTP server by using the
tftp-server
global configuration command. For more information about the
tftp-server
command, see the “Basic File Transfer Services Commands” section of the
Cisco IOS Configuration Fundamentals Command Reference, Release 12.2 :
You can upgrade switch software by using the device manager or Network Assistant. For detailed instructions, click
Note When using the device manager to upgrade your switch, do not use or close your browser session after the upgrade process begins. Wait until after the upgrade process completes.
This procedure is for copying the combined tar file to the switch. You copy the file to the switch from a TFTP server and extract the files. You can download an image file and replace or keep the current image.
To download software, follow these steps:
Step 1 Use
to identify the file that you want to download.
Step 2 Download the software image file:
a. If you are a registered customer, go to this URL and log in.
b. Navigate to
Switches &
LAN Switches - Access.
c. Navigate to your switch model.
IOS Software, then select the latest IOS release.
Download the image you identified in .
Step 3 Copy the image to the appropriate TFTP directory on the workstation, and make sure that the TFTP server is properly configured.
For more information, see Appendix B in the software configuration guide for this release.
Step 4 Log into the switch through the console port or a Telnet session.
Step 5 (Optional) Ensure that you have IP connectivity to the TFTP server by entering this
privileged EXEC command:
Switch# ping tftp-server-address
For more information about assigning an IP address and default gateway to the switch, see the software configuration guide for this release.
Step 6 Download the image file from the TFTP server to the switch. If you are installing the same version of software that is currently on the switch, overwrite the current image by entering this privileged EXEC command:
Switch# archive download-sw /overwrite /reload tftp:[[//location]/directory]/image-name.tar
/overwrite option overwrites the software image in flash memory with the downloaded one.
/reload option reloads the system after downloading the image unless the configuration has been changed and not saved.
The / allow-feature-upgrade option allows installation of an image with a different feature set.
location, specify the IP address of the TFTP server.
For / directory
image-name .tar, specify the directory (optional) and the image to download. Directory and image names are case sensitive.
This example shows how to download an image from a TFTP server at 198.30.20.19 and to overwrite the image on the switch:
Switch# archive download-sw /overwrite tftp://198.30.20.19/c3750-ipservices-tar.122-50.SE.tar
You can also download the image file from the TFTP server to the switch and keep the current image by replacing the
/overwrite option with the
/leave-old-sw option.
For recovery procedures, see the “Troubleshooting” chapter in the software configuration guide for this release.
Use these methods to assign IP information to your switch:
The Express Setup program, as described in the switch getting started guide.
The CLI-based setup program, as described in the switch hardware installation guide.
The DHCP-based autoconfiguration, as described in the switch software configuration guide.
Manually assigning an IP address, as described in the switch software configuration guide.
No new features were introduced.
No new features were introduced.
No new features were introduced.
Note Cisco Medianet is no longer supported on Catalyst 3560CG switches from Cisco IOS Release 15.2(2)E3.
No new features were introduced.
Device Sensor
(Catalyst 2960-C and 3560-C | LAN Base)
Note Device Classifier has been disabled by default starting from Release 15.2(2)E. Any features dependent on device classifier should enable it if required.
Provides quick and easy access to all relevant documentation for specific platforms. Look for
Quick Links to Platform Documentation on the respective platform documentation pages.
Integrated Documentation Guides
Provides platform and software documentation for two technologies:
IP Multicast Routing Configuration Guide
Cisco Flexible Netflow Configuration Guide.
SMI Post-install
Eliminates the overhead of manual post install configuration on all the switches, in the smart install network.
Auto Security
Provides a single line CLI, to enable base line security features (Port Security, DHCP snooping, DAI)
Object Tracking: IPv6 Route Tracking
(Catalyst 3560-C | IP-Base) Expands the Enhanced Object Tracking (EOT) functionality to allow the tracking of IP version 6 (IPv6) routes.
Open Plug-N-Play Agent
(Catalyst 2960-S, 2960-SF, 2960-C, 3560-C | LAN Lite, LAN Base, IP Base) Switch based agent support for zero touch automated device installation solution called NG-PNP.
Cisco TrustSec Critical Authentication
(Catalyst 3560-C IP Base) Ensures that the Network Device Admission Control (NDAC)-authenticated 802.1X links between Cisco TrustSec devices are in open state even when the Authentication, Authorization, and Accounting (AAA) server is not reachable.
Enabling Bidirectional SXP Support
(LAN Base, IP Base) Enhances the functionality of Cisco TrustSec with SXP version 4 by adding support for Security Group Tag (SGT) Exchange Protocol (SXP) bindings that can be propagated in both directions between a speaker and a listener over a single connection.
Role-Based CLI Inclusive Views
(Catalyst 2960 | LAN Base, IP Base) Enables a standard CLI view including all commands by default.
DHCP Gleaning
(IP Base) Allows components to register and glean DHCP packets.This is a read--only DHCP functionality.
WSMA Enhancements for wireless management
(Catalyst 2960 | LAN Lite, LAN Base, IP Base) Allows you to reduce the reconnecting rates in an outage when device connections to the management server on wireless networks are disconnected unexpectedly.
Banner Page and Inactivity timeout for HTTP/S connections
(LAN Lite, LAN Base, IP Base) Allows you to create a banner page and set an inactivity timeout for HTTP or HTTP Secure (HTTPS) connections. The banner page allows you to logon to the server when the session is invalid or expired.
Secure CDP
(Catalyst 2960-Plus, 2960-S, 3560-C, 2960-C | LAN Lite, LAN Base, IP Base) Allows you to select the type, length, value (TLV) fields that are sent on a particular interface to filter information sent through Cisco Discovery Protocol packets.
Configuring FQDN ACL
(Catalyst 2960-S, 2960-C, 3560-C | LAN Base, IP Base) Helps to resolve the destination domain name to an IP address, which is provided to the client as a part of the domain name system (DNS) response.
Web Authentication Redirection to Original URL
(Catalyst 2960-S, 3560-C, 2960-C | LAN Base, IP Base) Enables networks to redirect guest users to the URL they had originally requested. This feature is enabled by default and requires no configuration.
(Catalyst 2960-Plus, 2960-S, 3560-C, 2960-C | LAN Lite, LAN Base, IP Base) Determines the level of network access provided to an endpoint based on the type of the endpoint device. This feature also permits hard binding between the end device and the interface. Autoconfig falls under the umbrella of Smart Operations solution.
Interface templates
(Catalyst 2960-Plus, 2960-S, 3560-C, 2960-C | LAN Lite, LAN Base, IP Base) Provides a mechanism to configure multiple commands at the same time and associate it with a target such as an interface. An interface template is a container of configurations or policies that can be applied to specific ports.
FIPS/CC Compliance for NMSP
(Catalyst 2960-Plus, 2960-S, 3650-C, 2960-C | LAN Lite, LAN Base, IP Base) Enables strong ciphers for new NMSP connections. The existing NMSP connections will use the default cipher.
Smart Install Enhancements
(Catalyst 2960-P Switch) Smart Install is a plug-and-play configuration and image-management feature that provides zero-touch deployment for new switches. You can ship a switch to a location, place it in the network and power it on with no configuration required on the device.
SFP support: SFP-H10GB-ACU7M, SFP-H10GB-ACU10M
(Catalyst 2960-P and 2960-S Switches) Provides support for SFP-H10GB-ACU7M, SFP-H10GB-ACU10M (active CX1 cable assemblies).
For a list of all supported SFP and SFP+ modules, see
Cisco SFP+ Active Optical Cables
(Catalyst 2960-S Switch) Provides support for Cisco SFP+ Active Optical Cables - Cisco SFP-10G-AOC1M Cisco SFP-10G-AOC2M Cisco SFP-10G-AOC3M, Cisco SFP-10G-AOC5M, Cisco SFP-10G-AOC7M, Cisco SFP-10G-AOC10.
For a list of all supported SFP and SFP+ modules, see
lists the minimum software release required to support the major features of the Catalyst 2960-S, 2960-C, and 3560-C switches and the Cisco EtherSwitch service modules.
Table 4 Catalyst -C, 2960-S, 2960-SF, 2960-Plus and 3560-C Switches, and the Minimum Cisco IOS Release Required
Cisco TrustSec SXP version 2, syslog messages, and SNMP support
3560-C, 2960-S, 2960-C
Critical voice VLAN
NEAT enhancement to control access to the supplicant port
Auto Smartports improved device classification
EnergyWise Phase 2.5
12.2(58)SE1
Protocol storm protection
12.2(58)SE1
Smart Install 3.0
12.2(58)SE1
Auto Smartports enhancements to enable auto-QoS on a digital media player.
12.2(58)SE1
Memory consistency check routines
12.2(58)SE1
Call Home support
12.2(58)SE1
NTP version 4
12.2(58)SE1
RADIUS, TACACS+, and SSH/SCP over IPv6
12.2(58)SE1
IETF IP-MIB and IP-FORWARD-MIB(RFC4292 and RFC4293) updates
12.2(58)SE1
Auto-QoS enhancements
12.2(55)SE
Auto Smartport enhancements including global macros
12.2(55)SE
Smart Install enhancements and new features
12.2(55)SE
Port ACL improvements
12.2(55)SE
CDP and LLDP location enhancements
12.2(55)SE
Multi-authentication with VLAN assignment
12.2(55)SE
Static routing support on SVIs
12.2(55)SE
MAC replace to end a session when a host disconnects from a port.
12.2(55)SE
DHCP snooping and Option 82 and LLPD-MED in LAN lite image
12.2(55)SE
You should review this section before you begin working with the switch. These are known limitations that will not be fixed, and there is not always a workaround. Some features might not work as documented, and some features could be affected by recent changes to the switch hardware or software.
Note Device Classifier has been disabled by default starting from Release 15.2(2)E. Any features dependent on device classifier should enable it if required.
Unless otherwise noted, these limitations apply to the Catalyst 2960-S, 2960-SF, 2960-C, 2960-Plus, and 3560-C switches:
When connected to some third-party devices that send early preambles, a switch port operating at 100 Mb/s full duplex or 100 Mb/s half duplex might bounce the line protocol up and down. The problem is observed only when the switch is receiving frames.
The workaround is to configure the port for 10 Mb/s and half duplex or to connect a hub or a nonaffected device to the switch. (CSCed39091)
When port security is enabled on an interface in restricted mode and the
switchport block unicast interface command has been entered on that interface, MAC addresses are incorrectly forwarded when they should be blocked
The workaround is to enter the
no switchport block unicast
interface configuration command on that specific interface. (CSCee93822)
A traceback error occurs if a crypto key is generated after an SSL client session.
There is no workaround. This is a cosmetic error and does not affect the functionality of the switch. (CSCef59331)
The far-end fault optional facility is not supported on the GLC-GE-100FX SFP module.
The workaround is to configure aggressive UDLD. (CSCsh70244).
A ciscoFlashMIBTrap message appears during switch startup. This does not affect switch functionality. (CSCsj46992)
When you enter the
boot host retry timeout global configuration command to specify the amount of time that the client should keep trying to download the configuration and you do not enter a timeout value, the default value is zero, which should mean that the client keeps trying indefinitely. However, the client does not keep trying to download the configuration.
The workaround is to always enter a non zero value for the timeout value when you enter the
boot host retry timeout
timeout-value command. (CSCsk65142)
When authorization and accounting are enabled on the switch and you use the interface range command to change the configuration on a range of interfaces, the change might cause high CPU utilization and authentication failures.
The workaround is to disable authorization and accounting or to enter the configuration change for one interface at a time. (CSCsg80238, CSCti76748)
Cisco Medianet is no longer supported on Catalyst 3560CG switches from Cisco IOS Release 15.2(2)E3. (CSCuv82781, CSCuv87095)
Traffic on EtherChannel ports is not perfectly load-balanced. Egress traffic on EtherChannel ports are distributed to member ports on load balance configuration and traffic characteristics like MAC or IP address. More than one traffic stream may map to same member ports based on hashing results calculated by the ASIC.
If this happens, uneven traffic distribution will happen on EtherChannel ports.
Changing the load balance distribution method or changing the number of ports in the EtherChannel can resolve this problem. Use any of these workarounds to improve EtherChannel load balancing:
– for random source-ip and dest-ip traffic, configure load balance method as src-dst-ip
– for incrementing source-ip traffic, configure load balance method as src-ip
– for incrementing dest-ip traffic, configure load balance method as dst-ip
– Configure the number of ports in the EtherChannel so that the number is equal to a power of 2 (i.e. 2, 4, or 8)
For example, with load balance configured as
dst-ip with 150 distinct incrementing destination IP addresses, and the number of ports in the EtherChannel set to either 2, 4, or 8, load distribution is optimal.(CSCeh81991)
When the active switch fails in a switch cluster that uses HSRP redundancy, the new active switch might not contain a full cluster member list.
The workaround is to ensure that the ports on the standby cluster members are not in the spanning-tree blocking state. To verify that these ports are not in the blocking state, see the “Configuring STP” chapter in the software configuration guide. (CSCec76893)
When the rate of received DHCP requests exceeds 2,000 packets per minute for a long time, the response time might be slow when you are using the console.
The workaround is to use rate limiting on DHCP traffic to prevent a denial of service attack from occurring. (CSCeb59166)
After you change the access VLAN on a port that has IEEE 802.1x enabled, the IP phone address is removed. Because learning is restricted on IEEE 802.1x-capable ports, it takes approximately 30 seconds before the address is relearned.
No workaround is necessary. (CSCea85312)
Some access point devices are incorrectly discovered as IEEE 802.3af Class 1 devices. These access points should be discovered as Cisco pre-standard devices. The show power inline user EXEC command shows the access point as an IEEE Class 1 device.
The workaround is to power the access point by using an AC wall adaptor. (CSCin69533)
The Cisco 7905 IP Phone is error-disabled when the phone is connected to wall power.
The workaround is to enable PoE and to configure the switch to recover from the PoE error-disabled state. (CSCsf32300)
If the number of multicast routes and Internet Group Management Protocol (IGMP) groups are more than the maximum number specified by the
show sdm prefer global configuration command, the traffic received on unknown groups is flooded in the received VLAN even though the
show ip igmp snooping multicast-table privileged EXEC command output shows otherwise.
The workaround is to reduce the number of multicast routes and IGMP snooping groups to less than the maximum supported value. (CSCdy09008)
IGMP filtering is applied to packets that are forwarded through hardware. It is not applied to packets that are forwarded through software. Hence, with multicast routing enabled, the first few packets are sent from a port even when IGMP filtering is set to deny those groups on that port.
There is no workaround. (CSCdy82818)
If an IGMP report packet has two multicast group records, the switch removes or adds interfaces depending on the order of the records in the packet:
– If the ALLOW_NEW_SOURCE record is before the BLOCK_OLD_SOURCE record, the switch removes the port from the group.
– If the BLOCK_OLD_SOURCE record is before the ALLOW_NEW_SOURCE record, the switch adds the port to the group.
There is no workaround. (CSCec20128)
When IGMP snooping is disabled and you enter the
switchport block multicast interface configuration command, IP multicast traffic is not blocked.
switchport block multicast interface configuration command is only applicable to non-IP multicast traffic.
There is no workaround. (CSCee16865)
Incomplete multicast traffic can be seen under either of these conditions:
– You disable IP multicast routing or re-enable it globally on an interface.
– A switch mroute table temporarily runs out of resources and recovers later.
The workaround is to enter the
clear ip mroute
privileged EXEC command on the interface. (CSCef42436)
After you configure a switch to join a multicast group by entering the
ip igmp join-group group-address interface configuration command, the switch does not receive join packets from the client, and the switch port connected to the client is removed from the IGMP snooping forwarding table.
Use one of these workarounds:
– Cancel membership in the multicast group by using the
no ip igmp join-group
group-address interface configuration command on an SVI.
– Disable IGMP snooping on the VLAN interface by using the
no ip igmp snooping vlan
global configuration command. (CSCeh90425)
Entering the shutdown and the no shutdown interface configuration commands on the internal link can disrupt the PoE operation. If a new IP phone is added while the internal link is in shutdown state, the IP phone does not get inline power if the internal link is brought up within 5 minutes.
The workaround is to enter the shutdown and the no shutdown interface configuration commands on the Fast Ethernet interface of a new IP phone that is attached to the service module port after the internal link is brought up. (CSCeh45465)
Some switch queues are disabled if the buffer size or threshold level is set too low with the
mls qos queue-set output global configuration command. The ratio of buffer size to threshold level should be greater than 10 to avoid disabling the queue.
The workaround is to choose compatible buffer sizes and threshold levels. (CSCea76893)
When auto-QoS is enabled on the switch, priority queuing is not enabled. Instead, the switch uses shaped round robin (SRR) as the queuing mechanism. The auto-QoS feature is designed on each platform based on the feature set and hardware limitations, and the queuing mechanism supported on each platform might be different. There is no workaround. (CSCee22591)
If you configure a large number of input interface VLANs in a class map, a traceback message similar to this might appear:
01:01:32: %BIT-4-OUTOFRANGE: bit 1321 is not in the expected range of 0 to 1024
There is no impact to switch functionality.
There is no workaround. (CSCtg32101)
RADIUS change of authorization (COA) reauthorization is not supported on the critical auth VLAN.
There is no workaround. (CSCta05071)
When upgrading switches in a stack, the director cannot send the correct image and configuration to the stack if all switches in the stack do not start at the same time. A switch in the stack could then receive an incorrect image or configuration.
The workaround is to use an on-demand upgrade to upgrade switches in a stack by entering the
vstack download config and
vstack download image commands. (CSCta64962)
When you upgrade a Smart Install director to Cisco IOS Release 12.2(55)SE but do not upgrade the director configuration, the director cannot upgrade client switches.
When you upgrade the director to Cisco IOS Release 12.2(55)SE, the workaround is to also modify the configuration to include all built-in, custom, and default groups. You should also configure the tar image name instead of the image-list file name in the stored images. (CSCte07949)
Backing up a Smart Install configuration could fail if the backup repository is a Windows server and the backup file already exists in the server.
The workaround is to use the TFTP utility of another server instead of a Windows server or to manually delete the existing backup file before backing up again. (CSCte53737)
In a Smart Install network, when the director is connected between the client and the DHCP server and the server has options configured for image and configuration, then the client does not receive the image and configuration files sent by the DHCP server during an automatic upgrade. Instead the files are overwritten by the director and the client receives the image and configuration that the director sends.
Use one of these workarounds:
– If client needs to upgrade using an image and configuration file configured in the DHCP server options, you should remove the client from the Smart Install network during the upgrade.
– In a network using Smart Install, you should not configure options for image and configuration in the DHCP server. For clients to upgrade using Smart Install, you should configure product-id specific image and configuration files in the director. (CSCte99366)
If the director in the Smart Install network is located between an access point and the DHCP server, the access point tries to use the Smart Install feature to upgrade even though access points are not supported devices. The upgrade fails because the director does not have an image and configuration file for the access point.
There is no workaround. (CSCtg98656)
When a Smart Install director is upgrading a client switch that is not Smart Install-capable (that is, not running Cisco IOS Release 12.2(52)SE or later), the director must enter the password configured on the client switch. If the client switch does not have a configured password, there are unexpected results depending on the software release running on the client:
– When you select the NONE option in the director CLI, the upgrade should be allowed and is successful on client switches running Cisco IOS Release 12.2(25)SE through 12.2(46)SE, but fails on clients running Cisco IOS Release 12.2(50)SE through 12.2(50)SEx.
– When you enter any password in the director CLI, the upgrade should not be allowed, but it is successful on client switches running Cisco IOS Release 12.2(25)SE through 12.2(46)SE, but fails on clients running Cisco IOS Release 12.2(50)SE through 12.2(50)SEx.
There is no workaround. (CSCth35152)
When the RSPAN feature is configured on a switch, Cisco Discovery Protocol (CDP) packets received from the RSPAN source ports are tagged with the RSPAN VLAN ID and forwarded to trunk ports carrying the RSPAN VLAN. When this happens a switch that is more than one hop away incorrectly lists the switch that is connected to the RSPAN source port as a CDP neighbor.
This is a hardware limitation. The workaround is to disable CDP on all interfaces carrying the RSPAN VLAN on the device connected to the switch. (CSCeb32326)
CDP, VLAN Trunking Protocol (VTP), and Port Aggregation Protocol (PAgP) packets received from a SPAN source are not sent to the destination interfaces of a local SPAN session. The workaround is to use the
monitor session
session_number
destination { interface
interface-id
encapsulation replicate}
global configuration command for local SPAN. (CSCed24036)
CSCtl60247
When a switch or switch stack running Multiple Spanning Tree (MST) is connected to a switch running Rapid Spanning Tree Protocol (RSTP), the MST switch acts as the root bridge and runs per-VLAN spanning tree (PVST) simulation mode on boundary ports connected to the RST switch. If the allowed VLAN on all trunk ports connecting these switches is changed to a VLAN other than VLAN 1 and the root port of the RSTP switch is shut down and then enabled, the boundary ports connected to the root port move immediately to the forward state without going through the PVST+ slow transition.
There is no workaround.
IP traffic with IP options set is sometimes leaked on a trunk port. For example, a trunk port is a member of an IP multicast group in VLAN X but is not a member in VLAN Y. If VLAN Y is the output interface for the multicast route entry assigned to the multicast group and an interface in VLAN Y belongs to the same multicast group, the IP-option traffic received on an input VLAN interface other than one in VLAN Y is sent on the trunk port in VLAN Y because the trunk port is forwarding in VLAN Y, even though the port has no group membership in VLAN Y.
There is no workaround. (CSCdz42909).
For trunk ports or access ports configured with IEEE 802.1Q tagging, inconsistent statistics might appear in the
show interfaces counters privileged EXEC command output. Valid IEEE 802.1Q frames of 64 to 66 bytes are correctly forwarded even though the port LED blinks amber, and the frames are not counted on the interface statistics.
There is no workaround. (CSCec35100).
If the number of VLANs times the number of trunk ports exceeds the recommended limit of 13,000, the switch can fail.
The workaround is to reduce the number of VLANs or trunks. (CSCeb31087)
When line rate traffic is passing through a dynamic port, and you enter the switchport access vlan dynamic interface configuration command for a range of ports, the VLANs might not be assigned correctly. One or more VLANs with a null ID appears in the MAC address table instead.
The workaround is to enter the switchport access vlan dynamic interface configuration command separately on each port. (CSCsi26392)
When many VLANs are configured on the switch, high CPU utilization occurs when many links are flapping at the same time.
The workaround is to remove unnecessary VLANs to reduce CPU utilization when many links are flapping. (CSCtl04815)
When you are prompted to accept the security certificate and you click
No, you only see a blank screen, and the device manager does not launch.
The workaround is to click
Yes when you are prompted to accept the certificate. (CSCef45718)
Always power off a switch before adding or removing it from a switch stack.
Catalyst 2960-S switches internally support up to 16 different control plane queues. Each queue is dedicated to handling specific protocol packets and is assigned a priority level. For example, STP, routed, and logged packets are sent to three different control plane queues, which are prioritized in corresponding order, with STP having the highest priority. Each queue is allocated a certain amount of processing time based on its priority. The processing-time ratio between low-level functions and high-level functions is allocated as 1-to-2. Therefore, the control plane logic dynamically adjusts the CPU utilization to handle high-level management functions as well as punted traffic (up to the maximum CPU processing capacity). Basic control plane functions, such as the CLI, are not overwhelmed by functions such logging or forwarding of packets.
If the switch requests information from the Cisco Secure Access Control Server (ACS) and the message exchange times out because the server does not respond, a message similar to this appears:
00:02:57: %RADIUS-4-RADIUS_DEAD: RADIUS server 172.20.246.206: is not responding.
If this message appears, check that there is network connectivity between the switch and the ACS. You should also check that the switch has been properly configured as an AAA client on the ACS
If the switch has interfaces with automatic QoS for voice over IP (VoIP) configured and you upgrade the switch software to Cisco IOS Release 12.2(40)SE (or later), when you enter the
auto qos voip cisco-phone interface configuration command on another interface, you might see this message:
AutoQoS Error: ciscophone input service policy was not properly applied
policy map AutoQoS-Police-CiscoPhone not configured
If this happens, enter the no auto qos voip cisco-phone interface command on all interface with this configuration to delete it. Then enter the
auto qos voip cisco-phone
command on each of these interfaces to reapply the configuration.
You cannot create and manage switch clusters through the device manager. To create and manage switch clusters, use the CLI or Cisco Network Assistant.
When the switch is running a localized version of the device manager, the switch displays settings and status only in English letters. Input entries on the switch can only be in English letters.
For device manager session on Internet Explorer, popup messages in Japanese or in simplified Chinese can appear as garbled text. These messages appear properly if your operating system is in Japanese or Chinese
The Legend on the device manager incorrectly includes the 1000BASE-BX SFP module.
We recommend this browser setting to speed up the time needed to display the device manager from Microsoft Internet Explorer.
From Microsoft Internet Explorer:
Internet Options.
in the “Temporary Internet files” area.
3. From the Settings window, choose
Automatically.
OK to exit the Internet Options window.
The HTTP server interface must be enabled to display the device manager. By default, the HTTP server is enabled on the switch. Use the
show running-config privileged EXEC command to see if the HTTP server is enabled or disabled.
If you are
not using the default method of authentication (the enable password), you need to configure the HTTP server interface with the method of authentication used on the switch
Beginning in privileged EXEC mode, follow these steps to configure the HTTP server interface:
configure terminal
Enter global configuration mode.
ip http authentication { aaa | enable | local}
Configure the HTTP server interface for the type of authentication that you want to use.
aaa —Enable the authentication, authorization, and accounting feature. You must enter the aaa new-model interface configuration command for the
aaa keyword to appear.
enable—Enable password, which is the default method of HTTP server user authentication, is used.
local—Local user database, as defined on the Cisco router or access server, is used.
Return to privileged EXEC mode.
show running-config
Verify your entries.
The device manager uses the HTTP protocol (the default is port 80) and the default method of authentication (the enable password) to communicate with the switch through any of its Ethernet ports and to allow switch management from a standard web browser.
If you change the HTTP port, you must include the new port number when you enter the IP address in the browser
Location or
Address field (for example, http://10.1.126.45:184 where 184 is the new HTTP port number). You should write down the port number through which you are connected. Use care when changing the switch IP information.
If you use Internet Explorer Version 5.5 and select a URL with a nonstandard port at the end of the address (for example,
www. :84), you must enter
http:// as the URL prefix. Otherwise, you cannot launch the device manager.
The Bug Search Tool (BST), which is the online successor to Bug Toolkit, is designed to improve the effectiveness in network risk management and device troubleshooting. The BST allows partners and customers to search for software bugs based on product, release, and keyword, and aggregates key data such as bug details, product, and version. The tool has a provision to filter bugs based on credentials to provide external and internal bug views for the search input.
To view the details of a caveat listed in this document:
1. Access the BST (use your Cisco user ID and password) at
2. Enter the bug ID in the
Search For:
No Open Caveats
CSCuy19327
Template gets applied/removed continuously when we connect laptop
CSCuy19990
IOS 15.2 802.1x critical vlan feature - reinitialize is not working
CSCtn10697
(Catalyst 2960S) DHCP offer packet with option 125 crashes stout stack
CSCuj81067
Memory leak in crypto_create_pkcs7_msg
CSCuq46932
Crash on dhcpd_find_binding_by_hw
CSCur28336
Memory leak and possible crash when using a logging discriminator
CSCur45606
Logging discriminator does not work
CSCut42591
(Catalyst 2960S) MAC flapping and crash on unauth ports with auth control-direction in
CSCuv19773
&nmsp attach suppress& not being added into run-config on WS-C3850-24P
CSCuv23475
CPUHOG and crash on &no network 0.0.0.0& with vnet configuration on intf
CSCuv31135
Disable connected-check in one side only makes route as unreachable
CSCuv39850
Switch crashes @auth_mgr_show_method_status_list
CSCuv41831
(Catalyst 3560C) Traffic failure after exec show tech at 3560CG
CSCuw52729
Enabling auto qos causes &line vty 0 4& length set to 0
CSCuw73525
3650 DHCPv6 Guard does not block rogue DHCP server to provide IPv6 addr
CSCuo93205
Enable SSL Server Identity Check during SSL handshake
CSCui35423
DHCP bindings are not happening at first try
CSCuj31600
Call Home causes stack member crash
CSCul30895
Syslog messages not generated for BFD neighbor up/down events
CSCul73513
Server-client clock not in sync after leap configuration
CSCum17258
EPM_SESS_ERR: Error in activating feature (EPM ACL PLUG-IN)
CSCum65703
Inconsistency on configuration &privilege& commands as seen in running-config
CSCun14713
Create new accounting session whenever the principal identity changes
CSCuo77805
(2960-S) Memory leak in ASP with MAB/dot1X enabled- Catalyst 2960s
CSCup66629
Traceback @psecure_platform_delete_all_addrs on executing neg events
CSCup81878
Line by Line Sync fails while deleting dynamic NTP peer
CSCuq99943
(2960-S) Watchdog Exception for hulc/sisf component
CSCur01780
(2960-C) Cat6500 FlowControl oper is changed to on with sh/no interface
CSCur09175
IPDT is turned on automatically even when dot1x configs are disabled
CSCur11439
Energywise Activitycheck powers off phone during an active call
CSCur58372
&snmp-server enable traps syslog& shows in &show run all& output after removal
CSCur59242
Crash due to tplus_client_stop_timer
CSCur86947
dummy mcast pkt is not sent out when hsrp mac is there in mac-table
CSCus00357
(2960-S) Uplink port flap occurs one hour later from the time of bootup
CSCus09761
IOS-Phone not placed in critical voice VLAN when AAA server is unreached
CSCus13476
CSR handled only one MACSec interface's authentication
CSCus13924
Device crashes while configuring 'Identity' commands
CSCus47009
Switch does not increment the &Received on untrusted ports& DHCP counter
CSCus54579
(2960-S) Cat2960S ping lost with SSH session
CSCus79132
Dot1x authentication legacy behaviour broken
CSCut05808
UDP(1975) causes Error msg %IPC-2-INVALIDZONE
CSCut10251
Some commands are not in running-config after AUTOINSTALL finishes
CSCut13064
BPDU filter does not work on output port when STP is disabled
CSCut13458
Specific packet will be forwarded when injected into flexlink backup I/F
CSCut13753
ACLs not syncing to the member switches on stack reload or member reload
CSCut20271
C3560X response ARP request from management port
CSCut27272
CPUHOG and crash due to Auth Manager process
CSCut42591
(2960-S) MAC flapping and crash on unauth ports with auth control-direction in
CSCut68786
PoE inline power denied between WS-C3560CPD and AP1600
CSCut79680
ip default-gateway is not seen in running-config after AUTOINSTALL
CSCut87425
CPU hog in &EEM TCL Proc& after TCL script termination with long runtime
CSCuu16044
3750 - Not Processing LACP PDUs if Native VLAN is not created
CSCuu22144
Vlan1 IP apply method inconsistencies across Static / DHCP / TFTP
CSCuu42684
nas-port attribute hardcoded to 60000
CSCuu50392
Auth Manager memory leak with ISE authentication
CSCuu82134
IBC:VSS-Predator: Active Predator went SMI upgrade but not standby
CSCuu90639
IP address is missing by end of Autoinstall
CSCuu97116
Acct messages should include Class attribute from authentication
CSCuv06451
IOSd crash in eap_auth_terminal_state calling free_internal
CSCuv19258
DACL may not work under IBNS 2.0
CSCur20444
I/O memory leak due to DHCPv6 packets.
CSCur48634
HA fails due to Bulk synch failure with encrypted password.
CSCus47009
Switch does not increment the &Received on untrusted ports& DHCP counter
CSCus75890
Switch does not resync to NTP server after clock set command
CSCuf82297
(2960-C) Compact switch IOS dropped support for &power inline port 2x-mode&
CSCum47115
EtherType 888e unicast can not pass 2960 with new releases
CSCum77450
(2960-S) Incorrect mac address tables synchronisation on stack of 2960s
CSCun53377
(2960-S) Need to send syslogs fail our message for UPBParityError
CSCun80959
Desg port on the RootBridge experienced block forward for 30 sec
CSCun84283
C2960 || Copper connection interfaces || Keepalive set by default
CSCuo95181
Group specific Query with Router alert option dropped.
CSCup49030
EX90/60 can't get ip via DHCP in data vlan
CSCup68355
s crash w/. creating EC part of walle module or downlinks
CSCup75539
(2960-C) WS-C2960CG-8TC-L dual root bridge occur when execute &show tech&
CSCup96299
IPv6 Multicast RIB entry refer to wrong distance
CSCuq10827
C3560X cHsrpGrpStandbyState is incorrect
CSCuq58584
UDP(1975) causes Error msg %IPC-2-INVALIDZONE: Invalid IPC Zone on 3750X
CSCur00722
Hard Reset of the Active Sup cause switch to power cycle
User documentation in HTML format includes the latest documentation updates and might be more current than the complete book PDF available .
These documents provide more information about the Catalyst 2960-S, 2960-SF, 2960-C, 2960-Plus, and 3560-C switches and are available :
These documents provide complete information about the Catalyst 2960 and 2960-S switches and are available :
Catalyst 2960 and 2960-S Switch Software Configuration Guide
Catalyst 2960 and 2960-S Switch Command Reference
Catalyst , , , and 2960-S Switch System Message Guide
Catalyst 2960-S Switch Hardware Installation Guide
Catalyst 2960-S Switch Getting Started Guide
Catalyst 2960 Switch Hardware Installation Guide
Catalyst 2960 Switch Getting Started Guide
Catalyst 2960 Switch Getting Started Guide —available in English, simplified Chinese, French, German, Italian, Japanese, and Spanish
Regulatory Compliance and Safety Information for the
2960 and 2960-S
For other information about related products, see these documents:
Smart Install Configuration Guide
Auto Smartports Configuration Guide
Cisco EnergyWise Configuration Guide
Getting Started with Cisco Network Assistant
Release Notes for Cisco Network Assistant
Cisco RPS 300 Redundant Power System Hardware Installation Guide
Cisco RPS 675 Redundant Power System Hardware Installation Guide
For more information about the Network Admission Control (NAC) features, see the
Network Admission Control
Software Configuration Guide
Information about Cisco SFP, SFP+, and GBIC modules is available from
SFP compatibility matrix documents are available from
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly
What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation:
Subscribe to the
What’s New in Cisco Product Documentation
as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
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