Firstly, QFX5100 series doesn’t support EVPN-VXLAN inter-VXLAN routing, so I practice all IRB related topics on vMX devices. vQFXs acts as a simple L2 EVPN gateways. This post continues the EVPN-VXLAN lab from the previous ones. Full vMX IRB interfaces configuration: alex@vMX1# show interfaces irb unit 100 { proxy-macip-advertisement; family inet { address 172.16.0.251/24 { virtual-gateway-address 172.16.0.254; } } …
For simplified Layer 3 gateway services, where Layer 3 routing protocols are not run on the MC-LAG peers, you simply configure the same Layer 3 gateway IP address on both MC-LAG peers and enable IRB MAC address synchronization. This IP address is used as the default gateway for the MC-LAG servers or hosts. For more advanced Layer 3 gateway services, where Layer 3 routing protocols and Layer 3 multicast operations are required on the MC-LAG peers, you configure unique IRB…
First note – QFX5100 series doesn’t support EVPN-VXLAN inter-VXLAN routing, and doesn’t support EVPN-MPLS at all. So all information in this post applicable only to MX devices. For EVPN-MPLS there is two types of IRB implementation: configuration of same MAC address on every IRB interface; default gateway MAC synchronization using EVPN default-gateway community. In EVPN-MPLS it is expected, that if IRB functionality necessary for this L2 domain, then IRB interfaces should be configured on every participating PE router. …