Hi, RFC9135 describes some scenarios where a PE withdraws a MAC/IP route with only the MAC address if it had advertised such a route before. Here is one such scenario: <snip> On the source NVE, an age-out timer (for the silent host that has moved) is used to trigger an ARP probe. This age-out timer can be either an ARP timer or a MAC age-out timer, and this is an implementation choice. The ARP request gets sent both locally to all the attached TSs on that subnet as well as to all the remote NVEs (including the target NVE) participating in that subnet.
*The source NVE also withdraws the EVPN MAC/IP Advertisement route with only the MAC address (if it has previously advertised such a route).* </snip> Have some questions: 1) If the source NVE had allocated MPLS Label1 on a per MAC basis, is the source NVE expected to retain Label1 even after withdrawing the MAC/IP route with only the MAC address? Otherwise, it would invalidate the MAC/IP route with both the MAC and IP addresses since Label1 is mandatory and expected to be valid in that route, right? 2) If the source NVE re-advertises the MAC/IP route with both the MAC and IP addresses after withdrawing the MAC/IP route with only the MAC address, say because of a route refresh request, should the re-advertised route carry only the IP VRF Route Target? 3) Can the user assign the same route target for both the IP and MAC VRFs and use it to match against both? RFC9135 does not explicitly prohibit, but that may cause problems, for e.g. in #2 above, right? Comments/clarifications would be helpful.. Regards, Muthu
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