Cisco NCS 5500 Series

15. commit
16. show isis interface [ type interface-path-id | level { 1 | 2 }] [ brief ]
17. show isis [ instance instance-id ] database [ level { 1 | 2 }] [ detail | summary | verbose ] [ *
| lsp-id ]
18. show isis [ instance instance-id ] lsp-log [ level { 1 | 2 }]
19. show isis database-log [ level { 1 | 2 }]
DETAILED STEPS
Step 1 configure
Step 2 router isis instance-id
Example:
RP/0/RP0/CPU0:router(config)# router isis isp
Enables IS-IS routing for the specified routing instance, and places the router in router configuration mode.
• You can change the level of routing to be performed by a particular routing instance by using the is-type router
configuration command.
Step 3 lsp-refresh-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RP0/CPU0:router(config-isis)# lsp-refresh-interval 10800
(Optional) Sets the time between regeneration of LSPs that contain different sequence numbers
• The refresh interval should always be set lower than the max-lsp-lifetime command.
Step 4 lsp-check-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RP0/CPU0:router(config-isis)# lsp-check-interval 240
(Optional) Configures the time between periodic checks of the entire database to validate the checksums of the LSPs
in the database.
• This operation is costly in terms of CPU and so should be configured to occur infrequently.
Step 5 lsp-gen-interval { [ initial-wait initial | secondary-wait secondary | maximum-wait maximum ] ... }
[ level { 1 | 2 }]
Example:
RP/0/RP0/CPU0:router(config-isis)# lsp-gen-interval maximum-wait 15 initial-wait 5
(Optional) Reduces the rate of LSP generation during periods of instability in the network. Helps reduce the CPU load
on the router and number of LSP transmissions to its IS-IS neighbors.
• During prolonged periods of network instability, repeated recalculation of LSPs can cause an increased CPU load
on the local router. Further, the flooding of these recalculated LSPs to the other Intermediate Systems in the network
causes increased traffic and can result in other routers having to spend more time running route calculations.
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
20
Implementing IS-IS
Control LSP Flooding for IS-IS