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Usage guidelines
If a change occurs in the LSDB, IS-IS advertises the changed LSP to neighbors. You can specify the
minimum interval for sending these LSPs.
Configure a proper LSP retransmission interval to avoid unnecessary retransmissions.
Examples
# Configure the interval as 500 milliseconds for sending LSPs on interface VLAN-interface 10.
<Sysname> system-view
[Sysname] interface vlan-interface 10
[Sysname-Vlan-interface10] isis timer lsp 500
Related commands
isis timer retransmit
ispf enable
Use ispf enable to enable IS-IS incremental SPF (ISPF).
Use undo ispf enable to disable IS-IS ISPF.
Syntax
ispf enable
undo ispf enable
Default
IS-IS ISPF is enabled.
Views
OSPF view
Predefined user roles
network-admin
Usage guidelines
When a network topology is changed, ISPF recomputes only the affected part of the SPT, instead of the
entire SPT.
Examples
# Enable IS-IS ISPF.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] ispf enable
is-level
Use is-level to specify the IS level.
Use undo is-level to restore the default.
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