Section 4.1 of draft-ietf-bess-evpn-inter-subnet-forwarding describes the mobility procedure when a host initiates an ARP request upon a move.
It says the following regarding the source NVE: <snip> Furthermore, it sends an ARP probe locally to ensure that the MAC is gone. If an ARP response is received, the source NVE updates its ARP entry for that <IP, MAC> and re-advertises an EVPN MAC/IP route for that <IP, MAC> along with MAC Mobility Extended Community with the sequence number incremented by one. The source NVE also exercises the MAC duplication detection procedure in section 15.1 of [RFC7432]. </snip> Here, the source NVE is trying to verify if the TS has actually moved back. However, initiating an ARP probe looks redundant here since the host would anyway initiate an ARP request upon a move (which is the assumption in that section). So, the source NVE will anyway detect that the host has moved back if it re-learns the MAC/IP locally through the ARP request, right? Regards, Muthu
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