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Cisco IOS Software Releases 12.1 Special and Early Deployments

Cisco IOS Software Release 12.1(22) EA4

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PRODUCT BULLETIN NO. 2798

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.

OVERVIEW

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

Feature

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 Load Balancing

X
X
X
X
X

The Layer 2+ capable fixed-configuration Cisco Catalyst switches supported with this software release are listed in Table 2.

Table 2. Layer 2+ Products Supported

Cisco Catalyst 2955 Enhanced Image Models

Cisco Catalyst 2950 Series Enhanced Image Models

Cisco Catalyst 2950 Series Standard Image Models

Cisco Catalyst 2950 LRE Series Models

Cisco Catalyst 2940 Series Models

• 2955C-12

• 2955S-12

• 2955T-12

• 2950T-24

• 2950C-24

• 2950G-12-EI

• 2950G-24-EI

• 2950G-48-EI

• 2950G-24-EI-DC

• 2950-12

• 2950-24

• 2950SX-24

• 2950SX-48

• 2950T-48

• 2950LRE-24-997

• 2950ST-24-LRE

• 2950ST-8-LRE

• 2940-8TF

• 2940-8TT

ADDITIONAL RESOURCES

Software Download

The following software is available for download.

• Cisco Catalyst 2955 switches: http://www.cisco.com/cgi-bin/tablebuild.pl/cat2955

• Cisco Catalyst 2950 Series switches: http://www.cisco.com/cgi-bin/tablebuild.pl/cat2950

• Cisco Catalyst 2950 LRE Series switches: http://www.cisco.com/cgi-bin/tablebuild.pl/cat2950LRE

• Cisco Catalyst 2940 Series switches: http://www.cisco.com/cgi-bin/tablebuild.pl/cat2940

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.

Product Information

More information about the following products is available.

• Cisco Catalyst 2955 switches: http://www.cisco.com/go/catalyst2955

• Cisco Catalyst 2950 Series switches: http://www.cisco.com/go/catalyst2950

• Cisco Catalyst 2950 LRE Series switches: http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2940/index.htm

• Cisco Catalyst 2940 Series switches: http://www.cisco.com/go/catalyst2940

• Cisco Catalyst 2955, Catalyst 2950, Catalyst 2950 LRE, and Catalyst 2940 series and Catalyst 2955 release notes:

– http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/index.htm

– http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2940/index.htm

Support

Cisco IOS Software Release 12.1(22)EA4 follows the standard Cisco support policy as indicated at: http://www.cisco.com/en/US/products/products_end-of-life_policy.html

Software Image Migration Guide

Figure 1 displays Cisco IOS Software Release 12.1(22)EA4 relative to the 12.1 and 12.1E releases and identifies the recommended migration path.

Figure 1. Cisco IOS Software Release 12.1 Release Train

Text Box:  Corporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-4000	800 553-NETS (6387)Fax:	408 526-4100	European HeadquartersCisco Systems International BVHaarlerbergparkHaarlerbergweg 13-191101 CH AmsterdamThe Netherlandswww-europe.cisco.comTel:	31 0 20 357 1000Fax:	31 0 20 357 1100	Americas HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-7660Fax:	408 527-0883	Asia Pacific HeadquartersCisco Systems, Inc.168 Robinson Road#28-01 Capital TowerSingapore 068912www.cisco.comTel: +65 6317 7777Fax: +65 6317 7799Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed onthe Cisco Website at www.cisco.com/go/offices.Argentina · Australia · Austria · Belgium · Brazil · Bulgaria · Canada · Chile · China PRC · Colombia · Costa Rica · Croatia · Cyprus Czech Republic · Denmark · Dubai, UAE · Finland · France · Germany · Greece · Hong Kong SAR · Hungary · India · Indonesia · Ireland · Israel Italy · Japan · Korea · Luxembourg · Malaysia · Mexico · The Netherlands · New Zealand · Norway · Peru · Philippines · Poland · Portugal Puerto Rico · Romania · Russia · Saudi Arabia · Scotland · Singapore · Slovakia · Slovenia · South Africa · Spain · Sweden · Switzerland · Taiwan Thailand · Turkey · Ukraine · United Kingdom · United States · Venezuela · Vietnam · ZimbabweCopyright  2005 Cisco Systems, Inc. All rights reserved. CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, TeleRouter, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0502R)	204189.bx_ETMG_JR_3.05Printed in the USA Text Box:  Corporate HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-4000	800 553-NETS (6387)Fax:	408 526-4100	European HeadquartersCisco Systems International BVHaarlerbergparkHaarlerbergweg 13-191101 CH AmsterdamThe Netherlandswww-europe.cisco.comTel:	31 0 20 357 1000Fax:	31 0 20 357 1100	Americas HeadquartersCisco Systems, Inc.170 West Tasman DriveSan Jose, CA 95134-1706USAwww.cisco.comTel:	408 526-7660Fax:	408 527-0883	Asia Pacific HeadquartersCisco Systems, Inc.168 Robinson Road#28-01 Capital TowerSingapore 068912www.cisco.comTel: +65 6317 7777Fax: +65 6317 7799Cisco Systems has more than 200 offices in the following countries and regions. Addresses, phone numbers, and fax numbers are listed onthe Cisco Website at www.cisco.com/go/offices.Argentina · Australia · Austria · Belgium · Brazil · Bulgaria · Canada · Chile · China PRC · Colombia · Costa Rica · Croatia · Cyprus Czech Republic · Denmark · Dubai, UAE · Finland · France · Germany · Greece · Hong Kong SAR · Hungary · India · Indonesia · Ireland · Israel Italy · Japan · Korea · Luxembourg · Malaysia · Mexico · The Netherlands · New Zealand · Norway · Peru · Philippines · Poland · Portugal Puerto Rico · Romania · Russia · Saudi Arabia · Scotland · Singapore · Slovakia · Slovenia · South Africa · Spain · Sweden · Switzerland · Taiwan Thailand · Turkey · Ukraine · United Kingdom · United States · Venezuela · Vietnam · ZimbabweCopyright  2005 Cisco Systems, Inc. All rights reserved. CCSP, CCVP, the Cisco Square Bridge logo, Follow Me Browsing, and StackWise are trademarks of Cisco Systems, Inc.; Changing the Way We Work, Live, Play, and Learn, and iQuick Study are service marks of Cisco Systems, Inc.; and Access Registrar, Aironet, ASIST, BPX, Catalyst, CCDA, CCDP, CCIE, CCIP, CCNA, CCNP, Cisco, the Cisco Certified Internetwork Expert logo, Cisco IOS, Cisco Press, Cisco Systems, Cisco Systems Capital, the Cisco Systems logo, Cisco Unity, Empowering the Internet Generation, Enterprise/Solver, EtherChannel, EtherFast, EtherSwitch, Fast Step, FormShare, GigaDrive, GigaStack, HomeLink, Internet Quotient, IOS, IP/TV, iQ Expertise, the iQ logo, iQ Net Readiness Scorecard, LightStream, Linksys, MeetingPlace, MGX, the Networkers logo, Networking Academy, Network Registrar, Packet, PIX, Post-Routing, Pre-Routing, ProConnect, RateMUX, ScriptShare, SlideCast, SMARTnet, StrataView Plus, TeleRouter, The Fastest Way to Increase Your Internet Quotient, and TransPath are registered trademarks of Cisco Systems, Inc. and/or its affiliates in the United States and certain other countries.All other trademarks mentioned in this document or Website are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (0502R)	204189.bx_ETMG_JR_3.05Printed in the USA