Table Of Contents

Cisco High Availability Features Roadmap

Cisco High Availability Features Roadmap

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First Published: December 31, 2007

Last Updated: November 20, 2009

This roadmap lists the features documented in the High Availability (HA) modules and maps the features to the modules in which they appear.

Feature and Release Support

Table 1 lists the DHCP feature support for the following Cisco IOS software release trains:

•Cisco IOS Release 12.0S

•Cisco IOS Release 12.2S

•Cisco IOS Release 12.2SB

•Cisco IOS Release 12.2SR

•Cisco IOS Release 12.2SX

Only features that were introduced or modified in Cisco IOS Release 12.0(22)S, Cisco IOS Release 12.2(18)S, Cisco IOS Release 12.2(28)SB, Cisco IOS Releases 12.2(33)SRA, Cisco IOS Release 12.2(33)SXH, or a later release appear in the table. Not all features may be supported in your Cisco IOS software release.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

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Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

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Table 1 Supported DHCP Features 

Release	Feature Name	Where Documented
Cisco IOS Release 12.0S
12.0(22)S	Cisco Nonstop Forwarding	Cisco Nonstop Forwarding
	Stateful Switchover	Stateful Switchover
12.0(28)S	SSO - Multilink Frame Relay	Stateful Switchover
12.0(29)S	NSF/SSO—MPLS TE and RSVP Graceful Restart	NSF/SSO—MPLS TE and RSVP Graceful Restart
12.0(32)S	NSF—OSPF (RFC 3623 OSPF Graceful Restart)	NSF—OSPF (RFC 3623 OSPF Graceful Restart)
Cisco IOS Release 12.2S
12.2(18)S	Cisco Nonstop Forwarding	Cisco Nonstop Forwarding
	Stateful Switchover	Stateful Switchover
12.2(25)S	NSF/SSO—MPLS VPN	NSF/SSO—MPLS VPN
	NSF/SSO—Any Transport over MPLS and AToM Graceful Restart	NSF/SSO—Any Transport over MPLS and AToM Graceful Restart
	•SSO - Multilink Frame Relay •SSO - QoS	Stateful Switchover
Cisco IOS Release 12.2SB
12.2(28)SB	Cisco Nonstop Forwarding	Cisco Nonstop Forwarding
	In Service Software Upgrade	Cisco IOS In Service Software Upgrade Process
	ISSU MPLS Clients	ISSU MPLS Clients
	NSF/SSO—Any Transport over MPLS and AToM Graceful Restart	NSF/SSO—Any Transport over MPLS and AToM Graceful Restart
	NSF/SSO—MPLS VPN	NSF/SSO—MPLS VPN
	Stateful Switchover	Stateful Switchover
12.2(31)SB2	•ISSU - Dynamic Host Configuration Protocol (DHCP) on-demand address pool (ODAP) client/server •ISSU - DHCP proxy client •ISSU - DHCP relay on unnumbered interface •ISSU - DHCP server	ISSU and SSO--DHCP High Availability Features
	ISSU - First Hop Routing Protocol (FHRP) - Gateway Load Balancing Protocol (GLBP)	Configuring GLBP
	ISSU - Intermediate System-to-Intermediate System (IS-IS)	ISSU—IS-IS
	ISSU - Quality of Service (QoS)	Cisco IOS In Service Software Upgrade Process
	NSF—OSPF (RFC 3623 OSPF Graceful Restart)	NSF—OSPF (RFC 3623 OSPF Graceful Restart)
	•Dynamic Host Configuration Protocol (DHCP) On Demand Address Pool (ODAP) client/server •SSO - DHCP proxy client •SSO - DHCP relay on unnumbered interface •SSO - DHCP server •SSO - Gateway Load Balancing Protocol (GLBP) •SSO - Multilink Frame Relay •SSO - PPPoA •SSO - PPPoE	Stateful Switchover
12.2(33)SB	•SNMP support for ISSU	Cisco IOS In Service Software Upgrade Process
	•SSO - BFD (Admin Down)	Stateful Switchover
Cisco IOS Release 12.2SR
12.2(33)SRA	Cisco Nonstop Forwarding	Cisco Nonstop Forwarding
	NSF—OSPF (RFC 3623 OSPF Graceful Restart)	NSF—OSPF (RFC 3623 OSPF Graceful Restart)
	NSF/SSO—MPLS VPN	NSF/SSO—MPLS VPN
	NSF/SSO—MPLS TE and RSVP Graceful Restart	NSF/SSO—MPLS TE and RSVP Graceful Restart
	Stateful Switchover	Stateful Switchover
12.2(33)SRB	MPLS EM—MPLS LSR MIB - RFC 3813	MPLS EM—MPLS LSR MIB - RFC 3813
	NSF/SSO—MPLS TE and RSVP Graceful Restart	NSF/SSO—MPLS TE and RSVP Graceful Restart
	•SSO - Multilink Frame Relay •SSO - PPP	Stateful Switchover
12.(33)SRB1	•ISSU - ARP •ISSU - ATM •ISSU - Frame Relay •ISSU - GLBP •ISSU - HDLC •ISSU - HSRP •ISSU - IS-IS •ISSU - PPP/MLP •ISSU - QoS •ISSU - RIB/VRF •ISSU - SNMP	Cisco IOS In Service Software Upgrade Process
	ISSU MPLS Clients	ISSU MPLS Clients
	ISSU - Multitopology routing (MTR)	Multi-Topology Routing
12.2(33)SRC	FHRP - HSRP group shutdown	Configuring HSRP
	FHRP - HSRP Multiple Group Optimization	FHRP - HSRP Multiple Group Optimization
	•ISSU - DHCP proxy client •ISSU—DHCP ODAP client and server •ISSU - DHCP relay on unnumbered interface •ISSU - DHCP server	ISSU and SSO--DHCP High Availability Features
	•CEM SSO/ISSU •ISSU - Virtual template manager	Cisco IOS In Service Software Upgrade Process
	ISSU - VRRP	Configuring VRRP
	•CEM SSO/ISSU •SSO - DHCP proxy client •SSO - VRRP •Virtual template manager SSO	Stateful Switchover
12.2(33)SRE	•MFIB: IPv4 SSO/ISSU •NSF/SSO - IPv4 Multicast •SSO - IPv4 MFIB •ISSU - IPv4 Multicast	Monitoring and Maintaining Multicast HA Operations (NSF/SSO and ISSU)
	•NSF/SSO - IPv6 Multicast	•Cisco Nonstop Forwarding •Stateful Switchover
Cisco IOS Release 12.2SX
12.2(33)SXH	NSF—OSPF (RFC 3623 OSPF Graceful Restart)	NSF—OSPF (RFC 3623 OSPF Graceful Restart)
	NSF/SSO—MPLS VPN	NSF/SSO—MPLS VPN
	NSF/SSO—MPLS TE and RSVP Graceful Restart	NSF/SSO—MPLS TE and RSVP Graceful Restart
	•SSO - GLBP •SSO - HSRP	Stateful Switchover
Cisco IOS Release 12.4T
12.4(6)T1	NSF—OSPF (RFC 3623 OSPF Graceful Restart)	NSF—OSPF (RFC 3623 OSPF Graceful Restart)

1 Most HA features are not supported in Cisco IOS T or mainline software release trains.

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