If you enable unicast RPF strict and MPLS on a LER router, does the router first perform a the RPF lookup on the inbound packet? Or would the LER router push matching packets into a MPLS tunnel before the uRPF lookup?
While I have not read this in any normative document, to me, the logic dictates that the uRPF shall be performed first, and only if the packet passes the check, it should be processed further. If the uRPF check fails, the packet shall be dropped, which means there is no point in pushing any labels to it or forwarding it further just because there is an MPLS LSP onto which the packet can be forwarded.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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