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Implementing IS-IS on Cisco IOS XR Software

How to Implement IS-IS on Cisco IOS XR Software

RC-200

Cisco IOS XR Routing Configuration Guide

Tuning Adjacencies for IS-IS

This task explains how to enable logging of adjacency state changes, alter the timers for IS-IS adjacency

packets, and display various aspects of adjacency state. Tuning your IS-IS adjacencies increases network

stability when links are congested. This task is optional.

For point-to-point links, IS-IS sends only a single hello for Level 1 and Level 2, which means that the

level modifiers are meaningless on point-to-point links. To modify hello parameters for a point-to-point

interface, omit the specification of the level options.

The options configurable in the interface submode apply only to that interface. By default, the values are

applied to both Level 1 and Level 2.

The hello-password command can be used to prevent adjacency formation with unauthorized or

undesired routers. This ability is particularly useful on a LAN, where connections to routers with which

you have no desire to establish adjacencies are commonly found.

SUMMARY STEPS

1. configure

2. router isis instance-id

3. log adjacency changes

4. interface type number

5. hello-padding {disable | sometimes} [level {1 | 2}]

6. hello-interval seconds [level {1 | 2}]

7. hello-multiplier multiplier [level {1 | 2}]

8. hello-password {hmac-md5 | text} {clear | encrypted} password [level {1 | 2}] [send-only]

9. end

commit

10. show isis [instance instance-id] adjacency [interface-type interface-instance] [detail] [systemid

system-id]

11. show isis adjacency-log

12. show isis [instance instance-id] interface [type instance] [brief | detail] [level {1 | 2}]

13. show isis [instance instance-id] neighbors [interface-type interface-instance] [summary] [detail]

[systemid system-id]

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Cisco Router IOS XR Specifiche Pagina 214