I know that I'm getting a little ahead of technology but I'm working out an idea of using VMotion or VMWare HA to provide server redundancy between two datacenters. Unfortunately, one of the datacenters is offsite and connected over several L3 links.
Since my solution would require each VMWare server to access the same SAN space, I was thinking of using L2VPN extend a VLAN to the offsite data center and use FCoE to mirror the SAN space.
Since I am not much of a SAN guy, I was hoping that some of the more knowledgeable people here would let me know if this is possible.
Here is a GREAT presentation on FCoE by Dante Malagrino. I saw him give this presentation at EMC World 2008 and it answered a lot of my question.
I've gotten permission to post the other presentation on FCoE from EMC and will add it as an attachment to this posting. Feedback on these is desired/welcome and will be passed along.
I hope this helps to answer questions about FCoE.
Its true FCoE is meant to assist with data centre consolidation which means taking two switches (ethernet and FC) and putting the two protocol over one transport (with some extra features).
If you can have a l2vpn between sites and still ensure that the network is "lossless" ie: ensure that ethernet flow control is configured on the entire network it would prob work.
The whole distance limitation is basically a latency problem - applications don't like having to wait a second for each write to be ack'd - It will exist in any technology really.
The actual FCoE drafts are quite a good read, it would be worth reading up on it :)