Hi,
I've just racked up four N3048 Switches in preparation for the relocation of our EQL iSCSI SAN/Hosts (the actual relocation is not really relevant to this query).
Given the number of ports required and the HA requirements, we've deployed the first two switches as a 'switch' in a stack of 2 with the stacking cables correctly installed. The second 'switch' is identically cabled as a stack of two units.
The stack will give me two 'switches' with 96 ports each - one in rack A and one in rack B. This gives me the desired capacity and provides for redundancy (power and physical port). I don't want to create a 4 switch stack as I would have to reboot all 4 during a firmware upgrade etc.
Given we can now 'pretend' I have two switches (of 96 ports each), I need to address how to connect the LAG cables. We're using 10G SFP cables with the rear-mounted dual port SFP cards.
My specific query is on which port on which switch should go to the corresponding other side. In other words, should I connect the first SFP port on the topmost unit in rack A to the exact same port in rack B, then continue as second port on topmost switch in rack A to same port in rack B? [Option 1]
Or, should I be following the same methodology as the stack ports and connect first port topmost in rack A to bottom, last port in rack B so I'm essentially crossing all the switches over? [Option 2]
Or, third option, Split the connections so first switch, first port goes to same port but lower switch in rack B and same for 2nd port? [Option 3]
Any ideas/experience welcome. Oh, and if there is a TR on this scenario, I'd love the URL.
Cheers.