Exam JN0-683 topic 3 question 22 discussion

A. using anycast gateway addresses configured on the leaf devices In a bridged overlay architecture: Leaf switches act as the first-hop gateways for hosts in different virtual networks The same IP address (anycast gateway) is configured on multiple leaf switches Hosts in each virtual network use their local leaf's anycast gateway as their default gateway Inter-VLAN traffic is routed at the leaf layer where the traffic enters the fabric This distributed gateway approach eliminates the need for traffic tromboning to spine devices or external routers, providing optimal east-west communication between virtual networks. The other options don't apply to a bridged overlay architecture: Option B relates to EVPN-VXLAN routing Option C would create inefficient traffic patterns Option D isn't typical as spine devices don't usually provide gateway functionality

In a bridged overlay, the focus is on providing Layer 2 connectivity between VNIs, rather than relying heavily on Layer 3 routing within the fabric. Spine devices typically don't act as gateways, but rather provide connectivity between leaf devices. Leaf devices often terminate the VXLAN tunnels and may use external devices for routing between VNIs. If inter-VLAN routing is required for a bridged overlay, you can use an MX Series router or SRX Series security device that is external to the EVPN/VXLAN fabric. https://www.juniper.net/documentation/us/en/software/nce/sg-005-data-center-fabric/topics/task/bridged-overlay-cloud-dc-configuring.html#:~:text=A%20bridged%20overlay%20provides%20Ethernet,%2Dto%2Dleaf%20VXLAN%20tunnels.