Cisco Cisco IOS Software Release 12.2(27)SBC

Copyright © 2006 Cisco Systems, Inc. All rights reserved.

The carrier supporting carrier feature enables one MPLS VPN-based service provider to allow other 
service providers to use a segment of its backbone network. 

12.0(14)ST

This feature was introduced in Cisco IOS Release 12.0(14)ST. 

12.0(16)ST

Support for the Cisco 12000 series routers (Engine 0) for the 
Cisco IOS 12.0 ST release was added. 

12.2(8)T

This feature was integrated into Cisco IOS Release 12.2(8)T. Support was 
added for the Cisco 12.2 T release for the following platforms: Cisco 3640 
series, Cisco 3660 series, Cisco 4500 series, Cisco uBR7200 series, and 
the Cisco MGX Route Processor Module. 

12.0(21)ST

This feature was integrated into Cisco IOS Release 12.0(21)ST. Support 
for the Cisco 12000 series routers was added (for specific line cards 
supported, see 

). 

12.0(22)S

This feature was integrated into Cisco IOS Release 12.0(22)S. Support for 
the Cisco 12000 series routers was added (for specific line cards 
supported, see 

).

12.0(23)S

This feature was integrated into Cisco IOS Release 12.0(23)S. Support 
was added for the Cisco 12000 Series Eight-Port OC-3c/STM-1c ATM 
Line Card (8-Port OC-3 ATM) and the Cisco 12000 Series Three-Port 
Gigabit Ethernet Line Card (3-Port GbE).

12.2(14)S

This feature was integrated into Cisco IOS Release 12.2(14)S and 
implemented on Cisco 7200 and Cisco 7500 series routers.

12.2(28)SB

This feature was integrated into Cisco IOS Release 12.2(28)SB and 
implemented on the Cisco 10000 series routers