Administrator Guide

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 512 to 16000 for Non-Jumbo
mode and from 128 to 9195 for Jumbo mode. The default is 1497.
NOTE: The appropriate interface circuit is brought down and removed.
Defaults 1497 bytes.
Command Modes ROUTER ISIS
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S3148.
9.10(0.0) Introduced on the S6100–ON.
9.8(2.0) Introduced on the S3100 series.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.5(0.1) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.12.0 Introduced on the S4810.
8.3.11.1 Introduced on the Z9000.
7.5.1.0 Added support for LSP Throttling Enhancement.
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.
828 Intermediate System to Intermediate System (IS-IS)