Cisco ASR 9000 Series Configuration Guide

PurposeCommand or Action
(Optional) Configures the time between periodic checks of the
entire database to validate the checksums of the LSPs in the
database.
lsp-check-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)#
lsp-check-interval 240
Step 4
•
This operation is costly in terms of CPU and so should be
configured to occur infrequently.
(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.
lsp-gen-interval { [ initial-wait initial |
secondary-wait secondary | maximum-wait
maximum ] ... } [ level { 1 | 2 }]
Step 5
Example:
RP/0/RSP0/CPU0:router(config-isis)#
•
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
lsp-gen-interval maximum-wait 15 initial-wait
5
causes increased traffic and can result in other routers
having to spend more time running route calculations.
(Optional) Sets the maximum transmission unit (MTU) size of
LSPs.
lsp-mtu bytes [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)# lsp-mtu
1300
Step 6
(Optional) Sets the initial lifetime given to an LSP originated by
the router.
max-lsp-lifetime seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)#
max-lsp-lifetime 11000
Step 7
•
This is the amount of time that the LSP persists in the
database of a neighbor unless the LSP is regenerated or
refreshed.
(Optional) Sets the router to purge LSPs received with checksum
errors.
ignore-lsp-errors disable
Example:
RP/0/RSP0/CPU0:router(config-isis)#
ignore-lsp-errors disable
Step 8
Enters interface configuration mode.
interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-isis)# interface
GigabitEthernet 0/1/0/3
Step 9
(Optional) Configures the amount of time between each LSP
sent on an interface.
lsp-interval milliseconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
lsp-interval 100
Step 10
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
298 OL-30423-03
Implementing IS-IS
Controlling LSP Flooding for IS-IS

Cisco ASR 9000 Series Specifications

General

Brand	Cisco
Model	ASR 9000 Series
Category	Network Router
Language	English