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Version Description
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
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). After 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
Set the maximum transmission unit (MTU) of IS-IS link-state packets (LSPs). This command only limits the size of LSPs this
router generates.
Syntax
lsp-mtu size
To return to the default values, use the no lsp-mtu command.
Parameters
size The maximum LSP size, in bytes. The range is from 128 to 1497 for Non-Jumbo
mode and from 128 to 9195 for Jumbo mode. The default is 1497.
Defaults 1497 bytes.
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Command
History
Version Description
9.9(0.0) Introduced on the FN IOM.
9.2(0.0) Introduced on the MXL 10/40GbE Switch IO Module.
Usage
Information
The link MTU and the LSP MTU size must be the same.
Because each device can generate a maximum of 255 LSPs, consider carefully whether you use the
lsp-mtu command.
lsp-refresh-interval
Set the link state PDU (LSP) refresh interval. LSPs must be refreshed before they expire. When the LSPs are not refreshed
after a refresh interval, they are kept in a database until their max-lsp-lifetime reaches zero and then LSPs is purged.
Syntax
lsp-refresh-interval seconds
To restore the default refresh interval, use the no lsp-refresh-interval command.
Parameters
seconds The LSP refresh interval, in seconds. This value has to be less than the seconds
value specified with the max-lsp-lifetime command. The range is from 1 to
65535 seconds. The default is 900.
Defaults 900 seconds
Command Modes ROUTER ISIS
Supported Modes Full–Switch
Intermediate System to Intermediate System (IS-IS) 703