Cisco ASR 9000 Series Configuration Manual page 327

Implementing IS-IS
Command or Action
Step 11
csnp-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
csnp-interval 30 level 1
Step 12
retransmit-interval seconds [ level { 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
retransmit-interval 60
Step 13 retransmit-throttle-interval milliseconds
{ 1 | 2 }]
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
retransmit-throttle-interval 1000
Step 14
mesh-group { number | blocked }
Example:
RP/0/RSP0/CPU0:router(config-isis-if)#
mesh-group blocked
Step 15
commit
Step 16 show isis interface [ type interface-path-id | level
{ 1 | 2 }] [ brief ]
Example:
RP/0/RSP0/CPU0:router# show isis interface
GigabitEthernet 0/1/0/1 brief
Step 17 show isis [ instance instance-id ] database [ level
{ 1 | 2 }] [ detail | summary | verbose ] [ * |
lsp-id ]
Example:
RP/0/RSP0/CPU0:router# show isis database
level 1
Step 18
show isis [ instance instance-id ] lsp-log [ level
{ 1 | 2 }]
OL-30423-03
Purpose
(Optional) Configures the interval at which periodic CSNP
packets are sent on broadcast interfaces.
(Optional) Configures the amount of time that the sending router
waits for an acknowledgment before it considers that the LSP
was not received and subsequently resends.
RP/0/RSP0/CPU0:router(config-isis-if)#
retransmit-interval 60
[ level (Optional) Configures the amount of time between
retransmissions on each LSP on a point-to-point interface.
(Optional) Optimizes LSP flooding in NBMA networks with
highly meshed, point-to-point topologies.
(Optional) Displays information about the IS-IS interface.
(Optional) Displays the IS-IS LSP database.
(Optional) Displays LSP log information.
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
Controlling LSP Flooding for IS-IS
• Sending more frequent CSNPs means that adjacent routers
must work harder to receive them.
• Sending less frequent CSNP means that differences in the
adjacent routers may persist longer.
• This time is usually greater than or equal to the lsp-interval
command time because the reason for lost LSPs may be
that a neighboring router is busy. A longer interval gives
the neighbor more time to receive transmissions.
• This command is appropriate only for an NBMA network
with highly meshed, point-to-point topologies.
299