Hello all,
For the IS-IS stability, we can set the Overload bit to improve it.
If an IS-IS device needs to be temporarily isolated, configure the overload state for it to prevent other devices from forwarding traffic to this IS-IS device and prevent blackhole routes.
If an IS (for example, an IS to be upgraded or maintained) needs to be temporarily isolated, configure the overload state for it so that no device will forward traffic to this IS.
IS-IS routes converge more quickly than BGP routes do. To prevent blackhole routes on a network where both IS-IS and BGP are configured, set an overload bit to instruct an IS to enter the overload state during its start or restart. After BGP convergence is complete, cancel the overload bit.
We can set the overload bit when the IS-IS startup, the configuration template is as below:
Table 1-1 IS-IS Overload Configuration
# isis 1 set-overload on-startup # commit # |
