We are streching vlans on our WAN Layer between 2 of our datacenters terminating on 6509 via DWDM. The reason why so we can have firewalls in HA pair, one per datacenter connected via the layer vlan streched between datacenters also loadbalancers and BGP Routers. The BGP routers are IGBP peers connected to streached vlans on the same subnet.
My big concern is spanning-tree loops can affect live services.
Is cisco LAM (LOCAL AREA MOBILITY) recommended instead of streaching vlans between datacenters WAN?
I'm having a very similar issue to yours, where we don't have load balancers and some servers in 2 datacenters require to be in the same subnet, and i don't like stretching layer 2 infrastructure as this is introducing a complicated layer 2 spanning tree structure.
LAM seems an idea, but i'd be interested as well if anyone else has different oppinions
By the way. There are some solutions which could work for your situation. The only problem with my situation is that the company doesn't agree with added complexity on the network. Even so , maybe it helps you:
1. If you have MPLS deployed in the backbone you can successfully use VPLS which basically extents layer 2 on top of layer 3 by using pseudo wires.
2. If you don't have MPLS , have a look into L2TPv3 which does the same thing but on top of an IP network
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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