Server virtualization and coud computing are the driving forces behind the need to span a network's L2 domain. This is where TRILL comes into play. You get horizontal scale-out in a flattened network, with multiple L2 forwarding paths powered by TRILL.
The question I have is just how far across the data center does the L2 domain really need to span? Lets say this is a vmware environment. The latest version of vSphere allows up to 32 hosts per cluster. Furthermore, it is only within that 32-host cluster that a vmotion or DRS or FT action can take place. Theoretically, you can configure the vmware cluster to span the entire server farm, end-to-end. But in reality, how are vmware clusters configured? I would think that the hosts in a cluster are largely configured in adjacent cabinets, not across the entire data center. So, do you REALLY need to span the L2 domain across the entire data center server farm?
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that can be used to enable night service which make it a straightforward
solution. CUCM also rich of many options and features that we can be
used to achieve the night service in differe...
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