EVPN-Multi-homing-BUM-traffic-Handling

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Case-1: Traffic Egress from dual homed end-host 


1.It may land on DF or non-DF based on hashing algorithm

2. For traffic from end-host to EVPN core DF,non-DF will not play any role

3. in case BUM lands on Leaf-1 it should flood to all the VTEPs participating on that vlan(vlan-10 in this case)

4.It may use head-end replication or underlay multicast (PIM)

5.all other VTEPS receive the BUM traffic (including Leaf-2 in this case)

6.reason for Leaf-2 to receive this - there should be other hosts on the same vlan (host-2)

7.now leaf-2 apply split-horizon rule. check the source VTEP ip and get to know its part of same ESI. and it wont forward to ESI-10 interface

8.But it can still forward to Host-2


Case-2: Traffic Ingress for dual-home server



1.Host-3 sends BUM traffic

2.Either head-end replication or underlay multicast

3.only DF will forward to the ESI segment 




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