Table Of Contents
Cisco High Availability Features Roadmap
Cisco High Availability Features Roadmap
First Published: December 31, 2007Last Updated: November 25, 2009This feature roadmap lists the Cisco IOS XE features documented in the Cisco IOS XE High Availability Configuration Guide and maps them to the documents in which they appear. The roadmap is organized so that you can select your release train and see the features in that release. Find the feature name you are searching for and click on the URL in the "Where Documented" column to access the document containing that feature.
Many legacy features have been incorporated into the configuration files, and these features may not have entries in this roadmap. For the latest feature information and caveats, see the release notes for your platform and software release.
Feature and Release Support
Table 1 lists High Availability feature support for the following Cisco IOS XE software release trains:
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS XE 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.
Note
Table 1 lists only the Cisco IOS XE software release that introduced support for a given feature in a given Cisco IOS XE software release train. Unless noted otherwise, subsequent releases of that Cisco IOS XE software release train also support that feature.
Table 1 lists the most recent release of each software train first and the features in alphabetical order within the release.
Table 1 Supported High Availability Features
Cisco IOS XE Release 2.1
AAA High Availability Support for Local PPPoX Sessions
This feature enhances the authentication, authorization, and accounting (AAA) capability to meet high availability (HA) criteria for locally terminated Point-to-Point Protocol (PPP) over Ethernet (PPPoE) and PPPoEoX sessions, where X represents VLAN, or QinQ.
Dual Cisco IOS processes on the same RP
This features allows a standby IOS process to be available on the same Route Processor as the active IOS process. This standby IOS process can be switched to in the event of an IOS failure, and can also be used to upgrade sub-package software in some scenarios as the standby IOS process in an ISSU upgrade. On the Cisco ASR 1000 Series Routers, IOS runs as one of many processes within the operating system.
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
Enhanced SNMP Support for High Availability
This document describes the enhancements and modifications made to the Cisco IOS Simple Network Management Protocol (SNMP) infrastructure to support SSO for Route Processors (RPs).
IPv6: Base protocols high availability
This feature extends high availability (HA) features, nonstop forwarding and stateful switchover (NSF/SSO) and In Service Software Upgrade (ISSU), functionality to IPv6 protocols and applications.
IPv6: NSF and Graceful Restart for MP-BGP IPv6 Address Family
The graceful restart capability is supported for IPv6 BGP unicast, multicast, and VPNv6 address families, enabling Cisco nonstop forwarding (NSF) functionality for BGP IPv6. The BGP graceful restart capability allows the BGP routing table to be recovered from peers without keeping the TCP state. NSF continues forwarding packets while routing protocols converge, therefore avoiding a route flap on switchover.
IPv6: RIPng Nonstop Forwarding
IPv6 Routing Information Protocol (RIP) supports nonstop forwarding (NSF). RIP registers as an IPv6 NSF client. Doing so has the benefit of using RIP routes installed in the Cisco Express Forwarding table until RIP has converged on the standby.
IPv6: Static Route Nonstop Forwarding
IPv6 static routes support Cisco nonstop forwarding (NSF). NSF continues forwarding packets while routing protocols converge, therefore avoiding a route flap on switchover.
ISSU
The In Service Software Upgrade (ISSU) feature allows Cisco IOS XE software to be updated or otherwise modified while packet forwarding continues. In most networks, planned software upgrades are a significant cause of downtime. ISSU allows Cisco IOS XE software to be modified while packet forwarding continues, which increases network availability and reduces downtime caused by planned software upgrades.
ISSU - ARP
This feature provides In Service Software Upgrade (ISSU) support for Address Resolution Protocol High Availability.
ISSU - Frame Relay
This feature delivers In Service Software Upgrade (ISSU) support for Frame Relay connections during a planned software upgrade on a dual-RP HA platform utilizing ISSU capability.
ISSU - GLBPv6
This feature delivers In Service Software Upgrade (ISSU) support for GLBPv6
ISSU - HDLC
This feature provides In Service Software Upgrade (ISSU) support for the High-Level Data Link Control (HDLC) protocol.
ISSU - HSRPv6/VRRPv6
This feature provides In Service Software Upgrade (ISSU) support for Hot Standby Router Protocol for IPv6 and Virtual Router Redundancy Protocol for IPv6 (HSRPv6/VRRPv6).
ISSU - IGMP snooping
This feature adds In Service Software Upgrade (ISSU) support for Internet Group Management Protocol (IGMP) Snooping.
ISSU - IPv6 uRPF
This feature adds In Service Software Upgrade (ISSU) support for IPv6 Unicast Reverse Path Forwarding (uRPF).
ISSU - IS-IS
This feature adds In Service Software Upgrade (ISSU) support for the Intermediate System-to-Intermediate System (IS-IS) protocol.
ISSU - Managed LNS MPLS
This feature adds In Service Software Upgrade (ISSU) support for Managed L2TP network server (LNS) Multiprotocol Label Switching Protocol (MPLS), also know as VRF-Lite MPLS.
ISSU - MLD Access Group
This feature adds In Service Software Upgrade (ISSU) support for Multicast Listener Discovery Protocol (ML) access groups.
ISSU - Multicast MPLS VPN
This feature adds In Service Software Upgrade (ISSU) support for multicast Multiprotocol Label Switching Protocol (MPLS) Virtual Private Networks (VPNs).
ISSU - NAT
This feature adds In Service Software Upgrade (ISSU) support for Network Address Translation (NAT).
ISSU - PPP/MLP
This feature adds In Service Software Upgrade (ISSU) support for Point-to-Point Protocol/Multilink PPP (PPP/MLP).
ISSU - QoS
This feature provides In Service Software Upgrade (ISSU) support for quality of service (QoS).
ISSU - SNMP
This feature adds In Service Software Upgrade (ISSU) support for the Simple Network Management Protocol (SNMP).
NSF Awareness (Nonstop Forwarding Awareness)
The NSF Awareness feature provides Nonstop Forwarding (NSF) support for routing protocols—Border Gateway Protocol (BGP), Open Shortest Path First (OSPF), and Intermediate System-to-Intermediate System (IS-IS).
NSF Awareness - EIGRP
This feature provides Nonstop Forwarding (NSF) support for Enhanced Interior Gateway Routing Protocol (EIGRP).
NSF - BGP
This feature provides Border Gateway Protocol (BGP) support for Nonstop Forwarding (NSF).
NSF - EIGRP
This feature provides Enhanced Interior Gateway Routing Protocol (EIGRP) support for Nonstop Forwarding (NSF).
NSF - IS-IS
This feature provides Intermediate System-to-Intermediate System (IS-IS) support for Nonstop Forwarding (NSF).
NSF - OSPF
This features adds Open Shortest Path First (OSPF) support for high availability (HA) Nonstop Forwarding (NSF).
NSF—OSPF (RFC 3623 OSPF Graceful Restart
This document focuses on nonstop forwarding (NSF) for OSPFv2 in Cisco IOS XE software, using the IETF standardized graceful restart functionality as described in RFC 3623.
NSF/SSO - GLBPv6
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NSF/SSO - HSRPv6/VRRPv6
This feature provides high availability (HA) support for Hot Standby Router Protocol Version 6 and Virtual Router Redundancy Protocol Version 6 (HSRPv6/VRRPv6).
NSF/SSO - IPsec
This feature provides high availability (HA) support for IP security (IPsec).
NSF/SSO - IPv6 uRPF
This feature provides high availability (HA) support for IPv6 Unicast Reverse Path Forwarding (uRFP).
NSF/SSO - Managed LNS MPLS
This feature provides high availability (HA) support for Managed L2TP network server (LNS) Multiprotocol Label Switching Protocol (MPLS), also know as VRF-Lite MPLS.
NSF/SSO - MLD Access Group
This feature provides high availability (HA) support for Multicast Listener Discovery Protocol (MLD) Access Group.
NSF/SSO—MPLS VPN
This feature allows a provider edge (PE) router (with redundant Route Processors) to preserve data forwarding information in a Multiprotocol Label Switching (MPLS) Virtual Private Network (VPN) when the primary Route Processor restarts.
NSF/SSO (Nonstop Forwarding with Stateful Switchover)
Cisco Nonstop Forwarding (NSF) works with the Stateful Switchover (SSO) feature in Cisco IOS XE Software. NSF works with SSO to minimize the amount of time a network is unavailable to its users following a switchover. Stateful Switchover (SSO) maintains the layer two connectivity protocols between devices while Nonstop Forwarding (NSF) continues to forward IP packets during the route convergence time. The result is a transparent Route Processor (RP) failure; there are no loss sessions or route flaps in the network.
SSO - Frame Relay
This feature provides stateful switchover (SSO) support for Frame Relay. With SSO, Frame Relay dynamic state information is synchronized between the active Route Processor (RP) and standby RP.
SSO - GLBP
This feature provides stateful switchover (SSO) support for the Cisco Gateway Load Balancing Protocol (GLBP). With SSO, GLBP can detect when a router is failing over to the secondary Route Processor (RP) and continue in its current GLBP group state.
SSO - HDLC
This feature provides stateful switchover (SSO) support for High-Level Data Link Control (HDLC). HDLC SSO will synchronize dynamic HDLC information between a Primary Route Processor (RP) and a Secondary RP.
SSO - IGMP Snooping
This feature provides stateful switchover (SSO) support for Internet Group Management Protocol (IGMP) snooping. SSO with Layer 2 multicast state between the primary and the secondary supervisors. This feature allows the user to see virtually no interruption in multicast streams upon supervisor switchover.
SSO - Multilink PPP (MLP)
This feature provides stateful switchover (SSO) support for Multilink Point-to-Point Protocol (PPP). With SSO, specific PPP state information is synchronized between the active Route Processor (RP) and standby RP. Single-link PPP and Multilink PPP (MLP) sessions are maintained during RP switchover for IP connections only.
SSO - PPP
This feature provides stateful switchover (SSO) support for Point-to-Point Protocol (PPP). With SSO, specific PPP state information is synchronized between the active Route Processor (RP) and standby RP.
SSO - QoS
This feature provides stateful switchover (SSO) support for quality of service (QoS).
Stateful Switchover
Development of the stateful switchover (SSO) feature is an incremental step within an overall program to improve the availability of networks constructed with Cisco IOS XE routers.
Cisco IOS XE Release 2.3
ISSU - ATM
This feature provides In Service Software Upgrade (ISSU) support for ATM.
SSO - ATM
ATM Stateful Switchover (SSO) allows a router with redundant Route Processors (RPs) to exchange ATM state information to minimize the outage time due to RP failover.
Cisco IOS XE Release 2.5
NSF/SSO - Multicast MPLS VPN
This feature is supported in Cisco IOS XE Release 2.5.
ISSU - Multicast MPLS VPN
This feature is supported in Cisco IOS XE Release 2.5.
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