We are creating an L2 network extension using a pair of Cisco Catalyst 8000v devices (one on-premises, the other on cloud).
We have followed step by step the following documentation
https://www.cisco.com/c/en/us/td/docs/routers/C8000V/AWS/deploying-c8000v-on-amazon-web-services/configure-l2-extension-for-public-cloud.html
We have set up a management interface (with the IPSEC tunnel) and have 2 other NICS, each on the subnets to be extended.
The IPSEC tunnel between the 2 devices goes up correctly, but when we enable LISP routing, it dynamically learns a series of IP addresses (including those of the networks gateways of the subnets to be extended).
For these addresses the Catalyst starts responding to ARP requests even though we have configured the "no ip proxy-arp" option on the interfaces and causes disruption to the traffic to/from those subnets.
Any suggestions? Is L2 extension supported when the gateway of the networks to be extended is a third-party device? The actual third-party device does not support LISP so we could use it as a PETR, but I don't think it can be done if the EID is a subnet to be extended that Cisco sees as directly connected...
