05-24-2019 11:58 PM
05-25-2019 12:34 AM - edited 05-25-2019 12:46 AM
Hello Ibrahim,
the overload bit was introduced in ISIS as a way for an ISIS speaking router to signal it should not be used as a transit router as it is or out of resources or it is stlll converging.
All the other bits you mention are related to OSPF.
An OSPF router can become not-transit if using the command max-metric router-lsa under router ospf.
However, other OSPF implementations may set "the overload bit for OSPF" also
see the following thread that mentions a command for Juniper routers
https://community.cisco.com/t5/routing/ospf-overload/td-p/631715
Edit:
Actually also the Juniper implementations increases the metric of links in routers LSA to 65535
see
>> A timer is started for the difference between the timeout and the time elapsed since the instance started. When the timer expires, overload mode is cleared. In overload mode, the router link-state advertisement (LSA) is originated with all the transit router links (except stub) set to a metric of 0xFFFF.
I would say that setting the overload bit in OSPF is actually the same as using the max-metric router-lsa command in Cisco Routers.
Hope to help
Giuseppe
05-25-2019 06:24 AM
thanks Giuseppe
01-26-2022 11:28 AM - edited 03-24-2022 10:38 AM
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