Cisco Cisco IOS Software Releases 12.1 EC Guía De Información
![Cisco](https://files.manualsbrain.com/attachments/7380d0050044647c30f5c24bbbf5d0c0b6d9bb84/common/fit/150/50/faa183d287233c52228cfea3dbc2a127fe780f60564fcb0955d9c3d1cd23/brand_logo.png)
Cisco Systems, Inc.
All contents are Copyright © 1992–2004 Cisco Systems, Inc. All rights reserved. Important Notices and Privacy Statement.
Page 2 of 3
Table 2.
Product Part Numbers Affected by This Announcement
End-of-Sale Product Part Number
Product Description
12.1(2)EC1, 12.1(3a)EC1, 12.1(4)EC, 12.1(5)EC1, 12.1(6)EC,
12.1(6)EC1, 12.1(7)EC, 12.1(8)EC, 12.1(9)EC, 12.1(10)EC,
12.1(10)EC1, 12.1(11b)EC, 12.1(11b)EC1, 12.1(12c)EC, 12.1(13)EC,
12.1(13)EC1, 12.1(13)EC2, 12.1(13)EC3, 12.1(13)EC4, 12.1(19)EC,
12.1(19)EC1, 12.1(20)EC, 12.1(20)EC1, 12.1(20)EC2, 12.1(22)EC
12.1(6)EC1, 12.1(7)EC, 12.1(8)EC, 12.1(9)EC, 12.1(10)EC,
12.1(10)EC1, 12.1(11b)EC, 12.1(11b)EC1, 12.1(12c)EC, 12.1(13)EC,
12.1(13)EC1, 12.1(13)EC2, 12.1(13)EC3, 12.1(13)EC4, 12.1(19)EC,
12.1(19)EC1, 12.1(20)EC, 12.1(20)EC1, 12.1(20)EC2, 12.1(22)EC
The listed Cisco IOS Software release numbers are a comprehensive
representation of the maintenance releases in the 12.1 EC train. All
images, including subsequent posts, are included in this
announcement.
representation of the maintenance releases in the 12.1 EC train. All
images, including subsequent posts, are included in this
announcement.
PRODUCT MIGRATION OPTIONS
The recommended replacement for Cisco IOS Software Release 12.1 EC is Cisco IOS Release 12.3 BC. The Cisco IOS Software Release 12.3
BC train serves as the new cable-specific train, supporting enhanced functionality.
Table 3.
Product Comparisons
Feature
End-of-Life Cisco IOS Software
Release 12.1 EC Train
Release 12.1 EC Train
Cisco IOS Software Release 12.3 BC Train
Telco Return
Supported
Not Supported
Bridging Support
Supported
Supported in Cisco IOS Release 12.3(9a)BC1
DOCSIS Set-Top Gateway (DSG) 1.0
Not Supported
Supported
Frequency Stacking
Not Supported
Supported
Load Balancing
Not Supported
Supported
Subscriber Traffic Management 1.1
Not Supported
Supported
Subscriber Accounting and Management
Interface Specification (SAMIS)
Interface Specification (SAMIS)
Not Supported
Supported
Layer 2 VPN Services
Not Supported
Supported
Note: Cisco IOS Release 12.3 BC does not support telco-return functionality. Cisco recommends customers upgrade to a two-way cable plant.
When upgrading to a more recent release, certain software images may not be available, hardware may not be supported, or there may be some
changes to memory requirements. To verify functionality on required platforms, always consult the Cisco IOS Software Upgrade Planner and
Cisco Feature Navigator. For further information, visit:
Cisco IOS Software Upgrade Planner:
http://www.cisco.com/pcgi-bin/Software/Iosplanner/Planner-tool/iosplanner.cgi
Cisco Feature Navigator:
http://www.cisco.com/go/fn
Cisco Software Advisor:
http://www.cisco.com/pcgi-bin/Support/CompNav/Index.pl
Cisco IOS Software Releases:
http://www.cisco.com/warp/public/732/releases/
FOR MORE INFORMATION
For more information about the Cisco IOS Software Release 12.3 BC train, contact your local account representative or visit:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123relnt/ubr7200/123bcu72.htm
For more information about the Cisco End-of-Life Policy, visit:
http://www.cisco.com/en/US/products/prod_end_of_life.html