I have been reading up on UDLD and one of the primary use cases of using this protocol is to prevent L2 loops if a link becomes unidirectional. Does UDLD have any advantages on a routed ports or should this used on L2 ports only?
UDLD on L2 port, More information can be found here :
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Thanks for the reply.
I have checked our switches and UDLD is enabled on our L3 ports with full bidirectional neighbor states so it does seems that IOS-XE allows UDLD on routed ports. Are you saying that there is no benefit to this and the benefit is on L2 ports only?
UDLD is a layer 2 protocol to detect physical faults (layer-1). So, I don't see why it can't be used for both l2 and l3 links..
Does UDLD have any advantages on a routed ports or should this used on L2 ports only?
Is UDLD auto-recovery going to be enabled?
IF it is, don't enable UDLD: Auto-recovery simply defeats the purpose of UDLD plus, on a routed port(s), may cause high CPU (if the port goes up/down very, very often) which will ultimately lead to a crash.