Cisco Cisco IOS Software Release 12.0(24)S

This document describes the Stateful Switchover (SSO) feature in Cisco IOS Release 12.0(24)S. It 
includes the following sections:

12.0(22)S

This feature was introduced.

12.0(23)S

Support was added for 1xGE and 3xGE line cards on the 

12.0(24)S

Support was added for the following line cards on the 

Engine 1

2-port OC-12/STM-4c DPT

Engine 2

1-port OC-48/STM-16c DPT 

8-port OC-3/STM-1c ATM

IP Service Engine (ISE)

4-port OC-3c/STM-1c POS/SDH ISE

8-port OC-3c/STM-1c POS/SDH ISE

16-port OC-3c/STM-1c POS/SDH ISE

4-port OC-12c/STM-4c POS/SDH ISE

1-port OC-48c/STM-16c POS/SDH ISE

4-port channelized OC-12/STM-4 (DS3/E3, OC-3c/STM-1c) 
POS/SDH ISE 

1-port channelized OC-48/STM-16 (DS3/E3, OC-3c/STM-1c) 
POS/SDH ISE 

For platforms supported in Cisco IOS Release 12.0(22)S, 12.0(23)S, and 12.0(24)S, consult Cisco 
Feature Navigator.