rfc9721v2.txt   rfc9721.txt 
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sequence number for its parent MAC route and for its MAC-IP route sequence number for its parent MAC route and for its MAC-IP route
children. children.
5.3. Sequence Number Synchronization 5.3. Sequence Number Synchronization
To support mobility for multi-homed hosts, local MAC and MAC-IP To support mobility for multi-homed hosts, local MAC and MAC-IP
routes learned on a shared ES must be advertised with the same routes learned on a shared ES must be advertised with the same
sequence number by all PE devices to which the ES is multi-homed. sequence number by all PE devices to which the ES is multi-homed.
This applies to local MAC-only routes as well. MAC and MAC-IP routes This applies to local MAC-only routes as well. MAC and MAC-IP routes
for a host that is attached to a local ES may be learned via data for a host that is attached to a local ES may be learned via data
plane and ARP/NDP respectively, as well as via BGP EVPN from another plane and ARP/NDP, respectively, as well as via BGP EVPN from another
multi-homing PE to achieve local switching. MAC and MAC-IP routes multi-homing PE to achieve local switching. MAC and MAC-IP routes
learned via data plane and ARP/NDP are respectively referred to as learned via data plane and ARP/NDP are respectively referred to as
local MAC routes and local MAC-IP routes. BGP EVPN learned MAC and local MAC routes and local MAC-IP routes. BGP EVPN learned MAC and
MAC-IP routes for a host that is attached to a local ES are MAC-IP routes for a host that is attached to a local ES are
respectively referred to as Peer-Sync-Local MAC routes and Peer-Sync- respectively referred to as Peer-Sync-Local MAC routes and Peer-Sync-
Local MAC-IP routes as they are effectively local routes synchronized Local MAC-IP routes as they are effectively local routes synchronized
from a multi-homing peer. Local and Peer-Sync-Local route learning from a multi-homing peer. Local and Peer-Sync-Local route learning
can occur in any order. Local MAC-IP routes advertised by all multi- can occur in any order. Local MAC-IP routes advertised by all multi-
homing PE devices sharing the ES must carry the same sequence number, homing PE devices sharing the ES must carry the same sequence number,
independent of the order in which they are learned. This implies independent of the order in which they are learned. This implies
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