EVPN-VPWS Multihomed IOS-XR (Non-Bundle)
Load init.cfg
configure
load init.cfg
commit replace
y
Configure multi-homing without using bundle interfaces.
Configure two VPWS, one for VLAN 10 and one for VLAN 20.
Configure CE1 with 10.0.10.1/24 and 10.0.20.1/24. Configure CE2 with 10.0.10.2/24 and 10.0.20.2/24. Configure these only on Gi0/0/0/1 on each CE.
Answer
Explanation
This lab demostrates the use of multi-homed EVPN without bundle interfaces. This is possible by using standalone interfaces, but the only multi-homing mode available is single-active.
We can see this is true because the only load-balancing-mode available to us is single-flow-active, which is a variation of single-active. By default, single-active is used.
Note that we have the exact same challenges as we did in the previous lab when using single-active with a bundle. Both interfaces will be up from the CE’s perspective, but the standby PE will drop received traffic.
Since we are using even numbered EVIs, the PE with the lowest RID will be active (PE1 and PE3). We can control this the same way we did in the previous lab, using manual service carving. For example, this makes PE1 active for EVI 10 and PE2 active for EVI 20:
On the CE, we can just place the IPs on the physical interface that connects to the active PE. I’m not sure of a robust way to automatically failover between interfaces when using single-active mode.
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