Table Of Contents
Release Notes for the Catalyst 3750, 3550, 2970, 2955, 2950, 2950 LRE, and 2940 Switches, Cisco IOS Release 12.1(19)EA1a
Revised November 15, 2004
Cisco IOS Release 12.1(19)EA1a runs on these switches:
•Catalyst 2950 LRE
Note Use these release notes with the information in the Cisco IOS Release 12.1(19)EA1 release notes for these specific switch platforms.
Note Running Cisco IOS Release 12.1(19)EA1a in a switch stack that has other stack members running Cisco IOS Release 12.1(19)EA1 is not a supported configuration. We strongly recommend upgrading the entire switch stack to Cisco IOS Release 12.1(19)EA1a if at least one stack member is running this release.
These release notes include important information about this release and any caveats that apply to it. See the "Related Documentation" section for links to the switch documentation on Cisco.com.
This document has the following sections:
These sections describe the resolved caveats in this release:
Resolved Caveats for All Switches
Catalyst switches running Cisco IOS Release 12.1(19)EA1a no longer experience a memory leak in the Cisco Discovery Protocol (CDP) process.
Service Assurance Agent (SAA) probes no longer report incorrect jitter information.
Resolved Caveats for Catalyst 3750 Switches Only
The switch now receives Route Processor (RP) discovery messages on routed ports.
Catalyst 3750 switches no longer reset the outgoing interface (OIF) uptime every minute.
A Catalyst 3750 switch no longer times out the source and multicast group address (S, G) entries when passing low traffic (such as 3 packets per minute) from the source.
When you enter the ip default-network global configuration command, all packets that match the default route are no longer sent to the CPU.
The dynamic MAC address of the Hot Standby Router Protocol (HSRP) group is now relearned on the standby switch even if several interfaces have the same HSRP standby group.
Resolved Caveats for Catalyst 3750 and 2970 Switches Only
The switch no longer reloads when you add an aggregate policer to a new policy map. In previous releases, this happened if the aggregate policer had previously been used in a policy map that was attached to an interface, even if that policy map had been detached and removed from the interface.
The spanning-tree algorithm now blocks a Layer 2 loop if you change the native VLAN or a trunk port to a VLAN that you have not yet created.
When using SNMP to poll a switch, the ifHCInOctets and ifHCOutOctets are no longer 0 for Gigabit EtherChannel interfaces.
A Catalyst 2970 or Catalyst 3750 switch no longer allows Telnet sessions to the device from unauthorized hosts when you apply an access-class to inbound vty lines.
Resolved Caveats for Catalyst 3750, 3550, and 2950 Switches Only
The 10/100BASE-T interfaces on these switches now link correctly with media converters that are running at 10Bbs:
–Catalyst 3750s: WS-C3750-24TS-S/E, WS-C3750-48TS-S/E
–Catalyst 3550s: WS-C3550-24-DC-SMI, WS-C3550-24-SMI/EMI, WS-C3550-48-SMI/EMI
–Catalyst 2950: WS-C2950-12, WS-C2950-24, WS-C2950C-24, WS-C2950SX-24, WS-C2950SX-48-SI, WS-C2950T-24, WS-C2950T-48-SI
Resolved Caveats for Catalyst 3550 Switches Only
A Cisco IP phone no longer resets when connected to an interface that you have configured with a dynamic user VLAN.
When you enter the ip default-network global configuration command, all packets that match the default route are no longer sent to the CPU.
When a switch configured for Policy Based Routing (PBR) is notified that the interface to the primary next-hop device is down, CPU utilization no longer reaches 99 percent.
Resolved Caveats for Catalyst 2950 LRE Switches Only
Catalyst 2950 Long-Reach Ethernet (LRE) switches now support 802.3x flow-control packets on the Cisco 575 LRE and Cisco 576 LRE customer premises equipment (CPE) devices.
An LRE port no longer randomly stops forwarding traffic.
Which Software Files to Download from Cisco.com
New software releases are posted on Cisco.com and are also available through authorized resellers. These tables list the software filenames for this software release:
•Table 1 (Catalyst 3750)
•Table 2 (Catalyst 3550)
•Table 3 (Catalyst 2970)
•Table 4 (Catalyst 2955)
•Table 5 (Catalyst 2950)
•Table 6 (Catalyst 2950 LRE)
•Table 7 (Catalyst 2940)
Note We recommend that you download the combined .tar file that contains the image file and the HTML files. For instructions on how to upgrade your switch, refer to the Cisco IOS Release 12.1(19)EA1 release notes for your switch platform.
Caution A bootloader upgrade occurs if you are upgrading Catalyst 2950 switches running Cisco IOS Release 12.1(9)EA1d or earlier to Cisco IOS Release 12.1(11)EA1 or later for both cryptographic and noncryptographic images. A bootloader upgrade occurs if you are upgrading Catalyst 3550 switches from a noncryptographic image to cryptographic image, regardless of the current noncryptographic Cisco IOS Release that is running on the switch. The bootloader can take up to 30 seconds to upgrade. Do not power cycle the switch while you are copying this image to the switch. If a power failure occurs when you are copying this image to the switch, call Cisco Systems immediately.
Table 5 Cisco IOS Software Image Files for Catalyst 2950 Switches
Catalyst 2950 SI1 and EI files. This includes the Cisco IOS image and CMS files.
Catalyst 2950 EI files. This includes the cryptographic Cisco IOS image and CMS files
1 Switches that support only the SI cannot run the cryptographic image.
Table 7 Cisco IOS Software Image Files for Catalyst 2940 Switches
Catalyst 2940 files. This includes the Cisco IOS image and CMS files.
Correction to the Software Documentation for All Switches
This is a correction for the "Configuring Protected Ports" section in the software configuration guide and the "Usage Guidelines" section of the switchport protected command in the command reference:
A protected port does not forward unicast, multicast, or broadcast traffic to another protected port, except for Protocol Independent Multicast (PIM) packets and any other packets that the CPU must process. The switch does not forward data traffic between protected Layer 2 ports.
These documents provide complete information about the switches and are available at Cisco.com:
•For Catalyst 3750: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/index.htm
•For Catalyst 3550: http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/index.htm
•For Catalyst 2970: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2970/index.htm
•For Catalyst 2955, 2950, and 2950 LRE: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/index.htm
•For Catalyst 2940: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2940/index.htm
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