Reference Guide

Intermediate System to Intermediate System (IS-IS) | 929
Defaults
Defaults as above
Command Modes
ROUTER ISIS
Command
History
Usage
Information
LSP throttling slows down the frequency at which LSPs are generated during network instability. Even
though throttling LSP generations slows down network convergence, no throttling can result in a
network not functioning as expected. If network topology is unstable, throttling slows down the
scheduling of LSP generations until the topology regains its stability.
The first generation is controlled by the initial wait interval and the second generation is controlled by
the second wait interval. Each subsequent wait interval is twice as long as the previous one until the
wait interval reaches the maximum wait time specified (interval seconds). Once the network calms
down and there are no triggers for two times the maximum interval, fast behavior is restored (the initial
wait time).
lsp-mtu
e
Set the maximum transmission unit (MTU) of IS-IS link-state packets (LSPs). This command only
limits the size of LSPs generated by this router.
Syntax
lsp-mtu size
To return to the default values, enter no lsp-mtu.
Parameters
Defaults
1497 bytes
Command Modes
ROUTER ISIS
Command
History
initial_wait_interval
seconds
(OPTIONAL) Enter the initial wait time, in seconds, before running the first
LSP generation.
Range: 0 to 120 seconds
Default: 1 second
second_wait_interval
seconds
(OPTIONAL) Enter the wait interval, in seconds, between the first and
second LSP generation.
Range: 0 to 120 seconds
Default: 5 seconds
Version 8.3.19.0 Introduced on S4820T
Version 8.3.12.0 Introduced on S4810
Version 7.5.1.0 Expanded to support LSP Throttling Enhancement
size
The maximum LSP size, in bytes.
Range: 128 to 1497 for non-jumbo mode; 128 to 9195 for jumbo mode.
Default: 1497
Version 8.3.19.0 Introduced on S4820T
Version 8.3.12.0 Introduced on S4810
Version 7.5.1.0 Expanded to support LSP Throttling Enhancement