Cisco Systems 78-11741-02 manual Setting the Retransmission Interval, IPC-281

Configuring Integrated IS-IS

IS-IS Interface Parameters Configuration Task List

Setting the Retransmission Interval

You can configure the number of seconds between retransmission of IS-IS link-state packets (LSPs) for point-to-point links. To set the retransmission level, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)#isis retransmit-interval	Configures the number of seconds between retransmission of IS-IS
seconds	LSPs for point-to-point links.

The value you specify should be an integer greater than the expected round-trip delay between any two routers on the attached network. The setting of this parameter should be conservative, or needless retransmission will result. The value should be larger for serial lines.

Setting the LSP Transmissions Interval

To configure the delay between successive IS-IS LSP transmissions, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)# isis lsp-interval	Configures the delay between successive IS-IS LSP transmissions.
milliseconds

Setting the Retransmission Throttle Interval

You can configure the maximum rate at which IS-IS LSPs will be re-sent on point-to-point links, in terms of the number of milliseconds between packets. This configuration is different from the retransmission interval, which is the amount of time between successive retransmissions of the same LSP.

The retransmission throttle interval is typically not necessary, except in cases of very large networks with high point-to-point neighbor counts. To set the retransmission throttle interval, use the following command in interface configuration mode:

Command	Purpose
Router(config-if)#isis retransmit-throttle-interval	Configures the IS-IS LSP retransmission throttle interval.
milliseconds

Cisco IOS IP Configuration Guide

IPC-281