Guys
I have a question RE connecting a VXLAN fabric running eVPN to classical ethernet switches.
I have my fabric mapping vlan 123 to a vxlan - VTEPs are hosted on the 9ks – it is a network overlay only.
Hardware Nexus 93180 software - 7.0(3)I4(2)
I have a requirement to connect multiple classic vlan switches running STP via L2 trunks and to have connectivity to hosts in vlan 123.
The classic vlan switches are inter-connected.
The classic vlan switches are / will be up-linking to the same leaf switch.
I do not want to be running spanning tree on the fabric.
My fairly obvious concern therefore is that my fabric leaf switch becomes a broadcast bridge for my classic vlan to the other switches.
The 9k config guide helpfully tells me under the heading “Cisco Nexus 9000 as Hardware-Based VXLAN Gateway”
"This type of VXLAN-to-VLAN connectivity is enabled by using a VXLAN gateway.
A VXLAN gateway is a VTEP device that combines a VXLAN segment and a classic VLAN segment into one common Layer 2 domain".
BUT gives no indication as to how this is configured / tested / verified nor a description of forwarding behaviour.
Q1. How does a VXLAN configured switch treat bcast and L2 traffic from 802.1q trunks?
Q2. Are you mandated to run STP when connecting classic vlan domains to VXLANS?
Q3. How do you configure a VXLAN L2 domain to a classic vlan L2 domain as a (L2) VXLAN gateway.