I am trying to understand how to configure redundant switching to access a storage network. All devices are currently running on a single VLAN through 10G. Some are dual active-active (Xen hosts) while others have only one connection.
The change in question is over 7 years old, so I requested funds for a couple of replacements.
SANs are connected to the (current) switch through 2 lines: active and standby. I would like to put a line to each of the replacement switches and then duplicate all server network connections to each (new) switch.
What am I trying to plan for:
– switch failure (probable)
– SAN controller failure (also likely)
– server NIC failure (not as likely)
What I am not sure about is how to configure the server NICs. Does each one receive a separate IP or should I put them on LAG links (active-active or active on hold) with one of each pair on each switch?
It seems (to me) that this configuration will help if a switch fails, but not if a SAN storage controller fails.
Anyway, looking for a clue.