Cisco ASR 9000 Series Configuration Manual page 326

Controlling LSP Flooding for IS-IS
Command or Action
Step 4
lsp-check-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)#
lsp-check-interval 240
Step 5 lsp-gen-interval { [ initial-wait initial |
secondary-wait secondary | maximum-wait
maximum ] ... } [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)#
lsp-gen-interval maximum-wait 15 initial-wait
5
Step 6
lsp-mtu bytes [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)# lsp-mtu
1300
Step 7 max-lsp-lifetime seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis)#
max-lsp-lifetime 11000
Step 8 ignore-lsp-errors disable
Example:
RP/0/RSP0/CPU0:router(config-isis)#
ignore-lsp-errors disable
Step 9 interface type interface-path-id
Example:
RP/0/RSP0/CPU0:router(config-isis)# interface
GigabitEthernet 0/1/0/3
Step 10 lsp-interval milliseconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
lsp-interval 100
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
298
Purpose
(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.
(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.
(Optional) Sets the maximum transmission unit (MTU) size of
LSPs.
(Optional) Sets the initial lifetime given to an LSP originated by
the router.
• 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.
Enters interface configuration mode.
(Optional) Configures the amount of time between each LSP
sent on an interface.
Implementing IS-IS
OL-30423-03