Cisco MWR 2941 Installation Manual Page 391

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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Command Reference, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter Cisco MWR 2941 Router Command Reference, Release 15.1(3)MR
router isis
router isis
To enable the Intermediate System-to-Intermediate System (IS-IS) routing protocol and to specify an
IS-IS process, use the router isis command in global configuration mode. To disable IS-IS routing, use
the no form of this command.
router isis area-tag
no router isis area-tag
Syntax Description
Defaults This command is disabled by default.
Command Modes Global configuration
Command History
Usage Guidelines This command is used to enable routing for an area. An appropriate network entity title (NET) must be
configured to specify the area address of the area and system ID of the router. Routing must be enabled
on one or more interfaces before adjacencies may be established and dynamic routing is possible.
If you have IS-IS running and at least one International Standards Organization Interior Gateway
Routing Protocol (ISO-IGRP) process, the IS-IS process and the ISO-IGRP process cannot both be
configured without an area tag. The null tag can be used by only one process. If you run ISO-IGRP and
IS-IS, a null tag can be used for IS-IS, but not for ISO-IGRP at the same time. However, each area in an
IS-IS multiarea configuration should have a nonnull area tag to facilitate identification of the area.
area-tag Meaningful name for a routing process. If it is not specified, a null
tag is assumed and the process is referenced with a null tag. This
name must be unique among all IP or Connectionless Network
Service (CLNS) router processes for a given router.
Required for multiarea IS-IS configuration. Optional for
conventional IS-IS configuration.
Release Modification
10.0 This command was introduced.
12.0(5)T Multiarea functionality was added, changing the way the tag argument (now
area-tag) is used.
12.2(28)SB This command was integrated into Cisco IOS Release 12.2(28)SB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
12.2SX This command is supported in the Cisco IOS Release 12.2SX train. Support
in a specific 12.2SX release of this train depends on your feature set,
platform, and platform hardware.
12.4(20)MR This command was integrated into Cisco IOS Release 12.4(20)MR.
12.2(33)MRA This command was integrated into Cisco IOS Release 12.2(33)MRA.
15.0(1)MR This command was integrated into Cisco IOS Release 15.0(1)MR.
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