Setting the LSDB overload bit

By setting the overload bit in sent LSPs, a router informs other routers of failures that make it unable to select routes and forward packets.

When an IS-IS router cannot record the complete LSDB, for example, because of memory insufficiency, it will calculate wrong routes. To make troubleshooting easier, temporarily isolate the router from the IS-IS network by setting the overload bit.

To set the LSDB overload bit:

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter IS-IS view.

isis [ process-id ] [ vpn-instance vpn-instance-name ]

N/A

3. Set the overload bit.

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

By default, the overload bit is not set.