Huawei Quidway NetEngine80E Configuration Manual page 715

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
[RouterA-isis-1] quit
# Configure Router B.
[RouterB] isis 1
[RouterB-isis-1] flash-flood
[RouterB-isis-1] timer spf 1 20 100
[RouterB-isis-1] timer lsp-generation 1 1 120
[RouterB-isis-1] quit
Step 5 Verify the configuration.
# Run the shutdown command on GE 1/0/0 of Router B to simulate the link in the Down state.
[RouterB] interface gigabitethernet 1/0/0
[RouterB-GigabitEthernet1/0/0] shutdown
# View the information about neighbors of Router A.
<RouterA> display isis peer
Information about neighbors of Router A does not exist.
When BFD detects that the link goes Down, it notifies the route management (RM) module
immediately. IS-IS then deletes neighbors immediately and triggers the route calculation. This
results in the fast convergence of the network.
----End
Configuration Files
l
Issue 02 (2014-09-30)
NOTE
l In IS-IS, if LSDB changes, routes are calculated and then a new LSP is generated to report this change.
Frequent route calculations consume lots of system resources and degrade the system performance.
Delaying SPF calculation, generating a new LSP time, and LSP fast flooding improves the efficiency
in route calculation and reduces the consumption of system resources.
l Using the flash-flood command, you can enable LSP fast flooding to speed up the convergence of an
IS-IS network.
l Run the timer spf command to set the interval of the SPF calculation. By default, the interval is 5
seconds.
l Run the timer lsp-generation command to set the delay for generating an LSP. By default, the delay
is 2 seconds.
Configuration file of Router A
#
sysname RouterA
#
bfd
#
isis 1
is-level level-2
timer lsp-generation 1 1 120 level-1
timer lsp-generation 1 1 120 level-2
flash-flood level-1
flash-flood level-2
network-entity 10.0000.0000.0001.00
timer spf 1 20 100
#
interface GigabitEthernet1/0/0
ip address 10.1.1.1 255.255.255.0
isis enable 1
isis bfd static
#
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7 IS-IS Configuration
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