Silent Host upon a Move to the Target PE
This case assumes the host moves but it stays silent after the move. The steps are illustrated in Figure 1.
Host-1 moves from PE1 to PE2 but remains silent.
Eventually M1 ages out in PE1’s FDB and the RT2s for M1 are withdrawn. This update on M1 triggers PE1 to issue an ARP request for 10.1.
The flood-garp-and-unknown-req is configured. The ARP request makes it to PE2 and Host-1.
Host-1 sends an ARP reply that is consumed by PE2. FDB and ARP tables are updated.
The FDB and ARP updates trigger RT2s with M1-only and with 10.1-M1. Because an arp-nd dynamic host route is also created in the route-table, an RT5 with 10.1/32 is triggered.
Upon receiving the routes, PE1 updates FDB and ARP tables. The update on the ARP table from dynamic to evpn removes the host route from the route-table and withdraws the RT5 route.
