I'm usually against tagging a VLAN across a router, as to not incur issues with spanning tree.
My company is asking the following
PLC --Vlan72-- SwitchA --RouterA---CoreRouter---RouterB---DataCenterSwitch--Vlan72--FailoverServer
I'm asking to add an IP to this vlan and have it defined at RouterA, and use a different Vlan and subnet for the failover server in the datacenter. However, these PLC's don't have a mechanic for failover, and they want to Re-IP the failover server incase the primary goes down, which is located on SwitchA.
as a tidbit, i'm using ospf on my routers.
Is there something else I can provide to help them reach a solution? I don't want to stonewall them with not tagging a vlan across our cores.