Cisco Cisco IOS Software Release 12.2(27)SBC

© 2006 Cisco Systems, Inc. All rights reserved.

Cisco IOS Release 12.2(31)SB2 introduces the following series of Dynamic Host Configuration 
Protocol (DHCP) High Availability features that support the Broadband Access Server (BRAS):

ISSU—DHCP Server

SSO—DHCP Server

ISSU—DHCP Relay on Unnumbered Interface

SSO—DHCP Relay on Unnumbered Interface

ISSU—DHCP Proxy Client

SSO—DHCP Proxy Client

ISSU—DHCP ODAP Client and Server

SSO—DHCP ODAP Client and Server

These features are enabled by default when the redundancy mode of operation is set to Stateful 
Switchover (SSO).

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.