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IS-IS Overload Bit Deployment

Latest reply: Dec 27, 2018 12:26:42 1362 4 11 0 1

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

#


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YOO
Created Dec 25, 2018 01:49:59

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. Can you share more details?
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gecomsa
Created Dec 25, 2018 02:03:26

very good
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3li
Created Dec 25, 2018 13:48:37

Good
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user_2915719
Created Dec 27, 2018 12:26:42

This overload function is very useful for maintenance and troubleshooting. IS-IS Overload Bit Deployment-2835221-1
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