Cisco Systems® announces Cisco IOS® Software updates for the Cisco® Catalyst® 2950, Catalyst 2950 LRE, and Catalyst 2940 series and Cisco Catalyst 2955 Intelligent Ethernet switches. This new software release furthers Cisco leadership in providing secure, reliable, and feature-rich LAN switching solutions. This product bulletin contains content and delivery information for Cisco IOS Software Release 12.1(22)EA4. For more information about the Cisco IOS Software release process, refer to Product Bulletin 537.
Multicast Cisco EtherChannel
® load-balancing support allows load-balancing multicast traffic egressing an EtherChannel based strictly on destination MAC address. This allows multicast traffic to be distributed across all EtherChannel member ports, thus removing the restriction that multicast traffic is only forwarded on the the EtherChannel default port. Please note that unknown multicast destinations will not be load balanced and instead will be flooded on the EtherChannel default port. Multicast addresses reserved for different protocols (for example, Cisco Discovery Protocol or Spanning Tree Protocol) will also use the default port
NEW FEATURES IN CISCO IOS SOFTWARE RELEASE 12.1(22)EA4
The new features shown in Table 1 are delivered in Cisco IOS Software Release 12.1(22)EA4.
Table 1. Cisco IOS Software Release 12.1(22)EA4 New Features
Cisco Catalyst 2955 Switch Enhanced Image
Cisco Catalyst 2950 Series Enhanced Image
Cisco Catalyst 2950 Series Standard Image
Cisco Catalyst 2950 LRE Series
Cisco Catalyst 2940 Series Standard Image
Multicast EtherChannel LoadBalancing
The Layer 2+ capable fixed-configuration Cisco Catalyst switches supported with this software release are listed in Table 2.
Because of export restrictions on strong cryptography, a separate image is required for cryptographic features (Secure Shell [SSH] Protocol, Simple Network Management Protocol Version 3 [SNMPv3], and Kerberos Protocol). These software images can be downloaded from the corresponding Triple Data Encryption Standard (3DES) area of the links provided in this section.
More information about the following products is available.