Good morning, so a year or so ago I setup a remote site using 2 Aruba 1960 24 Port switches because I liked the idea having the portal to manage them. During setup I installed 2 fiber cables from each switch, stacking them and adding link aggregation. Recently the company needed some expansion so I sent them a third 1960 and this is where the trouble began.
Original setup: SW1 Port 27 → Sw2 Port 27, SW1 Port 28 → SW2 Port 28. On the new setup I had them install the switch and wire as follows, SW1 Port 27 → SW3 Port 28, SW1 Port 28 → SW2 Port 27, SW2 Port 28 → SW3 Port 27. I added the new device to the inventory and this is where issues arise, as the new switch was installing its software for the first time, it dropped offline during the install but never came back. I ended up having a staff person connect a LAN cable from any port on the 3rd switch to switch one, the 3rd switch then came back online, but removing that LAN cable would male the switch go offline. From there its been a pain, and have had terrible support from Aruba for nearly 3 weeks now trying to resolve the issue. 2 weeks ago I had a tech on site and had him swap around the new 10G transceivers to see if maybe a transceiver was bad, upon rebooting, switch 2 went offline and switch 3 came online, I ended the troubleshooting having the tech install the original modules into SW1 and SW2 and get my stack back working. I sent the aruba transceivers back and ordered 3 DAC cables and this past week, I had them install the DAC cables and SW2 went offline and SW3 came online. Sorry for such a long explanation just to get to my question, one thing I missed is I never deleted the Link Aggregation during all this troubleshooting and with Aruba wanting to RMA switch 2 I don’t think its a hardware issue but a configuration issue, I am thinking the LA is causing the problem most likely. I’m not running any redundant cabling like I was on the 2 switch stack . What do you think? This is a production environment so I’m trying to be careful to keep the company functioning so hesitant to make drastic moves.