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Table Of Contents
Integrated IS-IS Features Roadmap
Integrated IS-IS Features Roadmap
First Published: April 30, 2007
Last Updated: September 10, 2010
This roadmap lists the features documented in the Cisco IOS IP Routing: ISIS Configuration Guide and maps them to the modules in which they appear.
Feature and Release Support
Table 1 lists Integrated IS-IS feature support for the following Cisco IOS software release trains:
•
Cisco IOS Releases 12.2T, 12.3, 12.3T, 12.4, and 12.4T
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.
Note
Table 1 Supported Integrated IS-IS Features
12.0(29)S
IS-IS Support for an IS-IS Instance per VRF for IP
The IS-IS Support for an IS-IS Instance per VRF for IP feature provides multiple VPN routing and forwarding (VRF)-aware Intermediate System-to-Intermediate System (IS-IS) instances. The VRF functionality allows Internet service providers (ISPs) to separate routing protocol information and propagate it to the appropriate routing table and network neighbors. Using one router with VRF functionality is more cost-effective than using separate routers to separate and forward the routing information.
12.0(27)S
Integrated IS-IS Global Default Metric
The Integrated IS-IS Global Default Metric feature allows you to change the global IS-IS default metric for interfaces so that you need not change the metric values for the interfaces one by one. All interfaces that had the original IS-IS default metric 10 will be configured with the new default value.
Integrated IS-IS Protocol Shutdown Support Maintaining Configuration Parameters
This feature allows you to disable the Integrated IS-IS protocol at the interface level or at the global IS-IS process level without removing the IS-IS configuration parameters.
IS-IS Caching of Redistributed Routes
The IS-IS Caching of Redistributed Routes feature improves IS-IS convergence time when routes are being redistributed into IS-IS. This feature introduces new commands for monitoring and maintaining IS-IS redistributed routes.
IS-IS Fast-Flooding of LSPs Using the fast-flood Command
The IS-IS Fast-Flooding of LSPs Using the fast-flood Command feature improves IS-IS convergence time when new link-state PDUs (LSPs) are generated in the network and shortest path first (SPF) is triggered by the new LSPs. This feature introduces the new fast-flood command.
Reducing Link Failure and Topology Change Notification Times in IS-IS Networks
12.0(26)S
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
12.0(25)S
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
12.0(24)S
IS-IS Incremental SPF
Integrated IS-IS can be configured to use an incremental SPF algorithm for calculating the shortest path first routes. Incremental SPF is more efficient than the full SPF algorithm, thereby allowing IS-IS to converge faster on a new routing topology in reaction to a network event.
12.0(22)S
IS-IS HMAC-MD5 Authentication and Enhanced Clear Text Authentication
The IS-IS HMAC-MD5 authentication feature adds an HMAC-MD5 digest to each IS-IS protocol data unit (PDU). The digest allows authentication at the IS-IS routing protocol level, which prevents unauthorized routing message from being injected into the network routing domain. IS-IS clear text (plain text) authentication is enhanced so that passwords are encrypted when the software configuration is displayed and passwords are easier to manage and change.
IS-IS Mechanisms to Exclude Connected IP Prefixes from LSP Advertisements
Beginning with Cisco IOS Release 12.0(22)S, IS-IS caches routes that are redistributed from other routing protocols or from another IS-IS level into a local redistribution cache that is maintained by IS-IS. Caching occurs automatically and requires no configuration. The caching of redistributed routes improves IS-IS convergence time when routes are being redistributed into IS-IS. IS-IS caching of redistributed routes increases the performance of LSP generation, significantly improving network scalability.
12.2(25)S
Integrated IS-IS Global Default Metric
The Integrated IS-IS Global Default Metric feature allows you to change the global IS-IS default metric for interfaces so that you need not change the metric values for the interfaces one by one. All interfaces that had the original IS-IS default metric of 10 will be configured with the new default value.
12.2(25)S
Integrated IS-IS Protocol Shutdown Support Maintaining Configuration Parameters
This feature allows you to disable the Integrated IS-IS protocol at the interface level or at the global IS-IS process level without removing the IS-IS configuration parameters.
12.2(25)S
IS-IS Caching of Redistributed Routes
The IS-IS Caching of Redistributed Routes feature improves IS-IS convergence time when routes are being redistributed into IS-IS. This feature introduces new commands for monitoring and maintaining IS-IS redistributed routes.
12.2(25)S
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
12.2(18)S
IS-IS Incremental SPF
Integrated IS-IS can be configured to use an incremental SPF algorithm for calculating the shortest path first routes. Incremental SPF is more efficient than the full SPF algorithm, thereby allowing IS-IS to converge faster on a new routing topology in reaction to a network event.
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
IS-IS Mechanisms to Exclude Connected IP Prefixes from LSP Advertisements
Beginning with Cisco IOS Release 12.0(22)S, IS-IS caches routes that are redistributed from other routing protocols or from another IS-IS level into a local redistribution cache that is maintained by IS-IS. Caching occurs automatically and requires no configuration. The caching of redistributed routes improves IS-IS convergence time when routes are being redistributed into IS-IS. IS-IS caching of redistributed routes increases the performance of LSP generation, significantly improving network scalability.
IS-IS Support for Route Tags
The IS-IS Support for Route Tags feature provides the capability to tag IS-IS route prefixes and use those tags in a route map to control IS-IS route redistribution or route leaking.
12.2(11)S
IS-IS HMAC-MD5 Authentication and Enhanced Clear Text Authentication
The IS-IS HMAC-MD5 authentication feature adds an HMAC-MD5 digest to each IS-IS protocol data unit (PDU). The digest allows authentication at the IS-IS routing protocol level, which prevents unauthorized routing message from being injected into the network routing domain. IS-IS clear text (plain text) authentication is enhanced so that passwords are encrypted when the software configuration is displayed and passwords are easier to manage and change.
12.2(31)SB3
IS-IS MIB
The IS-IS MIB feature introduces MIB support for the IS-IS link-state routing protocol. IS-IS is used as the link-state routing protocol of choice by major service providers. The IS-IS MIB feature offers service providers an improved capability to continuously monitor the changing state of an IS-IS network by use of MIB objects to gather information relating to protocol parameters and trap notification objects that can signal the occurrence of significant protocol events such as an authentication failure or a mismatch in area addresses between Intermediate Systems (ISs). The protocol information collected by the IS-IS MIB objects and trap objects can be used by the network manager to derive statistics that can help monitor and improve overall network performance.
In 12.2(31)SB2, this feature was implemented on the Cisco 7000 series routers.
In 12.2(31)SB3, this feature was implemented on the Cisco 10000 series routers.
12.2(31)SB2
IS-IS MIB
The IS-IS MIB feature introduces MIB support for the IS-IS link-state routing protocol. IS-IS is used as the link-state routing protocol of choice by major service providers. The IS-IS MIB feature offers service providers an improved capability to continuously monitor the changing state of an IS-IS network by use of MIB objects to gather information relating to protocol parameters and trap notification objects that can signal the occurrence of significant protocol events such as an authentication failure or a mismatch in area addresses between Intermediate Systems (ISs). The protocol information collected by the IS-IS MIB objects and trap objects can be used by the network manager to derive statistics that can help monitor and improve overall network performance.
In 12.2(31)SB2, this feature was implemented on the Cisco 7000 series routers.
12.2(27)SBC
Integrated IS-IS Global Default Metric
The Integrated IS-IS Global Default Metric feature allows you to change the global IS-IS default metric for interfaces so that you need not change the metric values for the interfaces one by one. All interfaces that had the original IS-IS default metric of 10 will be configured with the new default value.
12.2(27)SBC
Integrated IS-IS Protocol Shutdown Support Maintaining Configuration Parameters
This feature allows you to disable the Integrated IS-IS protocol at the interface level or at the global IS-IS process level without removing the IS-IS configuration parameters.
12.2(27)SBC
IS-IS Incremental SPF
Integrated IS-IS can be configured to use an incremental SPF algorithm for calculating the shortest path first routes. Incremental SPF is more efficient than the full SPF algorithm, thereby allowing IS-IS to converge faster on a new routing topology in reaction to a network event.
12.2(27)SBC
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
12.2(27)SBC
IS-IS Mechanisms to Exclude Connected IP Prefixes from LSP Advertisements
Beginning with Cisco IOS Release 12.0(22)S, IS-IS caches routes that are redistributed from other routing protocols or from another IS-IS level into a local redistribution cache that is maintained by IS-IS. Caching occurs automatically and requires no configuration. The caching of redistributed routes improves IS-IS convergence time when routes are being redistributed into IS-IS. IS-IS caching of redistributed routes increases the performance of LSP generation, significantly improving network scalability.
12.2(27)SBC
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
12.2(27)SBC
IS-IS Support for Route Tags
The IS-IS Support for Route Tags feature provides the capability to tag IS-IS route prefixes and use those tags in a route map to control IS-IS route redistribution or route leaking.
12.2(33)SRB
IS-IS MIB
The IS-IS MIB feature introduces MIB support for the IS-IS link-state routing protocol. IS-IS is used as the link-state routing protocol of choice by major service providers. The IS-IS MIB feature offers service providers an improved capability to continuously monitor the changing state of an IS-IS network by use of MIB objects to gather information relating to protocol parameters and trap notification objects that can signal the occurrence of significant protocol events such as an authentication failure or a mismatch in area addresses between Intermediate Systems (ISs). The protocol information collected by the IS-IS MIB objects and trap objects can be used by the network manager to derive statistics that can help monitor and improve overall network performance.
In 12.2(31)SB2, this feature was implemented on the Cisco 7000 series routers.
In 12.2(31)SB3, this feature was implemented on the Cisco 10000 series routers.
12.2(33)SRB
IS-IS Support for an IS-IS Instance per VRF for IP
The IS-IS Support for an IS-IS Instance per VRF for IP feature provides multiple VPN routing and forwarding (VRF)-aware Intermediate System-to-Intermediate System (IS-IS) instances. The VRF functionality allows Internet service providers (ISPs) to separate routing protocol information and propagate it to the appropriate routing table and network neighbors. Using one router with VRF functionality is more cost-effective than using separate routers to separate and forward the routing information.
12.2(33)SRA
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
12.2(18)SXE
Integrated IS-IS Global Default Metric
The Integrated IS-IS Global Default Metric feature allows you to change the global IS-IS default metric for interfaces so that you need not change the metric values for the interfaces one by one. All interfaces that had the original IS-IS default metric of 10 will be configured with the new default value.
12.3(7)T
IS-IS Caching of Redistributed Routes
The IS-IS Caching of Redistributed Routes feature improves IS-IS convergence time when routes are being redistributed into IS-IS. This document introduces new commands for monitoring and maintaining IS-IS redistributed routes.
IS-IS Fast-Flooding of LSPs Using the fast-flood Command
The IS-IS Fast-Flooding of LSPs Using the fast-flood Command feature improves IS-IS convergence time when new link-state PDUs (LSPs) are generated in the network and shortest path first (SPF) is triggered by the new LSPs. This feature introduces the new fast-flood command.
Reducing Link Failure and Topology Change Notification Times in IS-IS Networks
12.3(4)T
Integrated IS-IS Global Default Metric
The Integrated IS-IS Global Default Metric feature allows you to change the global IS-IS default metric for interfaces so that you need not change the metric values for the interfaces one by one. All interfaces that had the original IS-IS default metric 10 will be configured with the new default value.
Integrated IS-IS Protocol Shutdown Support Maintaining Configuration Parameters
This feature allows you to disable the Integrated IS-IS protocol at the interface level or at the global IS-IS process level without removing the IS-IS configuration parameters.
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
12.3(2)T
IS-IS Incremental SPF
Integrated IS-IS can be configured to use an incremental SPF algorithm for calculating the shortest path first routes. Incremental SPF is more efficient than the full SPF algorithm, thereby allowing IS-IS to converge faster on a new routing topology in reaction to a network event.
IS-IS Mechanisms to Exclude Connected IP Prefixes from LSP Advertisements
Beginning with Cisco IOS Release 12.3(2)T, IS-IS caches routes that are redistributed from other routing protocols or from another IS-IS level into a local redistribution cache that is maintained by IS-IS. Caching occurs automatically and requires no configuration. The caching of redistributed routes improves IS-IS convergence time when routes are being redistributed into IS-IS. IS-IS caching of redistributed routes increases the performance of LSP generation, significantly improving network scalability.
IS-IS Support for Route Tags
The IS-IS Support for Route Tags feature provides the capability to tag IS-IS route prefixes and use those tags in a route map to control IS-IS route redistribution or route leaking.
12.2(15)T
Integrated IS-IS Nonstop Forwarding (NSF) Awareness
The Integrated IS-IS Nonstop Forwarding (NSF) Awareness feature allows customer premises equipment (CPE) routers that are NSF-aware to help NSF-capable routers perform nonstop forwarding of packets. This feature is part of the software code and requires no configuration.
12.2(13)T
IS-IS HMAC-MD5 Authentication and Enhanced Clear Text Authentication
The IS-IS HMAC-MD5 authentication feature adds an HMAC-MD5 digest to each IS-IS protocol data unit (PDU). The digest allows authentication at the IS-IS routing protocol level, which prevents unauthorized routing message from being injected into the network routing domain. IS-IS clear text (plain text) authentication is enhanced so that passwords are encrypted when the software configuration is displayed and passwords are easier to manage and change.
12.2(8)T
Integrated IS-IS Point-to-Point Adjacency over Broadcast Media
When a network consists of only two networking devices connected to broadcast media and uses the integrated IS-IS protocol, it is better for the system to handle the link as a point-to-point link instead of as a broadcast link. This feature introduces a new command to make IS-IS behave as a point-to-point link between the networking devices.
This feature improves the network convergence times of the customer's network because it saves the system from electing a designated router (DR), prevents flooding from using CSNPs for database synchronization, and simplifies shortest path first (SPF) computations.
15.0(1)M
IS-IS Support for an IS-IS Instance per VRF for IP
The IS-IS Support for an IS-IS Instance per VRF for IP feature provides multiple VPN routing and forwarding (VRF)-aware Intermediate System-to-Intermediate System (IS-IS) instances. The VRF functionality allows Internet service providers (ISPs) to separate routing protocol information and propagate it to the appropriate routing table and network neighbors. Using one router with VRF functionality is more cost-effective than using separate routers to separate and forward the routing information.
Cisco IOS XE 3.1.0SG
Integrated ISIS Point to Point Adjacency over Broadcast Media
When a network consists of only two networking devices connected to broadcast media and uses the integrated IS-IS protocol, it is better for the system to handle the link as a point-to-point link instead of as a broadcast link. This feature introduces a new command to make IS-IS behave as a point-to-point link between the networking devices.
Cisco IOS XE 3.1.0SG
IS-IS Caching of Redistributed Routes
The IS-IS Caching of Redistributed Routes feature improves IS-IS convergence time when routes are being redistributed into IS-IS. This feature introduces new commands for monitoring and maintaining IS-IS redistributed routes.
Cisco IOS XE 3.1.0SG
IS-IS HMAC-MD5 Authentication
The IS-IS HMAC-MD5 authentication feature adds an HMAC-MD5 digest to each IS-IS protocol data unit (PDU). The digest allows authentication at the IS-IS routing protocol level, which prevents unauthorized routing message from being injected into the network routing domain. IS-IS clear text (plain text) authentication is enhanced so that passwords are encrypted when the software configuration is displayed and passwords are easier to manage and change.
Cisco IOS XE 3.1.0SG
IS-IS Incremental SPF
Integrated IS-IS can be configured to use an incremental SPF algorithm for calculating the shortest path first routes. Incremental SPF is more efficient than the full SPF algorithm, thereby allowing IS-IS to converge faster on a new routing topology in reaction to a network event.
Cisco IOS XE 3.1.0SG
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
Cisco IOS XE 3.1.0SG
IS-IS Mechanism to Exclude Connected IP Prefixes from LSP Advertisements
Beginning with Cisco IOS Release 12.0(22)S, IS-IS caches routes that are redistributed from other routing protocols or from another IS-IS level into a local redistribution cache that is maintained by IS-IS. Caching occurs automatically and requires no configuration. The caching of redistributed routes improves IS-IS convergence time when routes are being redistributed into IS-IS. IS-IS caching of redistributed routes increases the performance of LSP generation, significantly improving network scalability.
Cisco IOS XE 3.1.0SG
IS-IS Limit on Number of Redistributed Routes
The IS-IS Limit on Number of Redistributed Routes feature provides for a user-defined maximum number of prefixes that are allowed to be redistributed into IS-IS from other protocols or other IS-IS processes. Such a limit could help prevent the router from being flooded by too many redistributed routes.
Cisco IOS XE 3.1.0SG
IS-IS Support for IP Route Tags
The IS-IS Support for Route Tags feature provides the capability to tag IS-IS route prefixes and use those tags in a route map to control IS-IS route redistribution or route leaking.
Cisco IOS XE 3.1.0SG
IS-IS Support for Priority-Driven IP Prefix RIB Installation
The IS-IS Support for Priority-Driven IP Prefix RIB Installation feature allows customers to designate a subset of IP prefixes advertised by Integrated IS-IS for faster processing and installation in the global routing table as one way to achieve faster convergence. For example, Voice over IP (VoIP) gateway addresses may need to be processed first to help VoIP traffic get updated faster than other types of packets.
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