DNS Anycast in Arista environment

[#1]

Has anyone configured Anycast on Arista with MLAG? This is our 1st Anycast deployment and will be going in our new Arista environment which uses MLAG configurations. We would be looking to use BGP vs OSPF. We also need to account for the VM potentially moving between different Hosts which are all dual connected to multiple Server Leafs. Looking for any gotchas from folks that may have done this configuration and any issues with multiple concurrent BGP peers? Woudl this be problematic? Also, is the LAN2 actually required for AnyCast? I see it mentioned in some Anycast related docs but not others. If using LAN2 do the Fowarders go away? We use Forwarders to point to out Caching Teir for external resolution.

[#2]

I have implemented same , use eBGP  

and we are using VM

it easier in arista compare to nexus switch 

[#3]

Sorry I didnt read your complete question

Has anyone configured Anycast on Arista with MLAG? yes

This is our 1st Anycast deployment and will be going in our new Arista environment which uses MLAG configurations. We would be looking to use BGP vs OSPF  //----yes BGP is best Option.

I did in 160+ Virtual/Cloud/Hardware type appliance

We also need to account for the VM potentially moving between different Hosts which are all dual connected to multiple Server Leafs. Looking for any gotchas from folks that may have done this configuration and any issues with multiple concurrent BGP peers? //----yes this is much easier 

make sure you are getting ARP in both Gateway Leaf Switch , need to create L3 VLAN in both Gateway Leaf Switch  ,keep  all ports  channel, VM VLAN and MLAG Peer VLAN   in default vrf and enable routing under state

Woudl this be problematic? No

Also, is the LAN2 actually required for AnyCast? I see it mentioned in some Anycast related docs but not others. If using LAN2 do the Fowarders go away? We use Forwarders to point to out Caching Teir for external resolution. ///LAN 2 interface is useless just like letter "p" in "psychology" , continue with LAN1 and IPMI for LOM

[#4]

Hello rkhan22,

We are still struggling with this a bit and hoping you may be able to provide more on your config. We build 2 vlans and 1 vlan conisted of 1 anycast member and a pair of server switches. I'll call them 01A&B. The 2nd flan consisted of the 2nd anycast membr and another pair of server switches. I'll call them 02A&B. When we configured the anycast members w/bgp and then bgp on Arista to set up the neighbor relationships, the LAN inteface stoped working becuase the vlan virtual address seemd to go away after BGP was created. Any idea why or how to fix that? The anycast addressing came out of another network space reserved for the /32 addresses. Hope that made sense?