set-overload

Use set-overload to set the overload bit.

Use undo set-overload to restore the default.

Syntax

set-overload [ on-startup [ [ start-from-nbr system-id [ timeout1 [ nbr-timeout ] ] ] | timeout2 | wait-for-bgp [ timeout3 ] ] ] [ allow { external | interlevel } * ]

undo set-overload

Default

The overload bit is not set.

Views

IS-IS view

Predefined user roles

network-admin

Parameters

on-startup: Sets the overload bit upon system startup.

start-from-nbr system-id [ timeout1 [ nbr-timeout ] ]: Starts the nbr-timeout timer when the router begins to establish the neighbor relationship with the neighbor after system startup. If the neighbor relationship is formed within the nbr-timeout interval, IS-IS keeps the overload bit set. If not, the bit is cleared. IS-IS keeps the overload bit set within the timeout1 interval after the neighbor relationship is formed within the nbr-timeout interval.

• system-id—Specifies the neighbor.

• timeout1—The timeout1 interval is in the range of 5 to 86400 seconds, and the default is 600 seconds.

• nbr-timeout—The timer has an interval from 5 to 86400 seconds. The default is 1200 seconds.

timeout2: Sets the overload bit within the timeout2 interval after system startup. The interval is in the range of 5 to 86400 seconds, and the default is 600 seconds.

wait-for-bgp [ timeout3 ]: Starts the timeout3 timer for BGP convergence after system startup. If BGP is not converged within the timeout3 interval, IS-IS clears the overload bit. The value range for the timeout3 argument is 5 to 86400 seconds, and the default is 600 seconds.

allow: Allows advertising address prefixes. By default, no address prefixes are allowed to be advertised when the overload bit is set.

external: Allows advertising IP address prefixes redistributed from other routing protocols with the allow keyword specified.

interlevel: Allows advertising IP address prefixes learned from different IS-IS levels with the allow keyword specified.

Usage guidelines

If the on-startup keyword is not specified, the command sets the overload bit immediately until the undo set-overload command is executed.

If the on-startup keyword is specified, IS-IS sets the overload bit upon system startup and keeps it set within the timeout2 interval.

Examples

# Set overload flag on the current router.

<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] set-overload