The question: is it possible to use ports from two separate switches in a daisy-chained configuration to create a LAG? Second switch in daisy chain: port 25 is the other half of the LAG to building 2, ports 26 and 27 LAG to building 3, and port 28 connects to the second redundant network. That is a total of eight SFP ports, but, in order to use fiber for all connections, one of the LAGs would have to be split across ports in the daisy-chained pairs:įirst switch in daisy chain: ports 25 and 26 LAG to building 1, port 27 connects to second switch in the daisy chain, port 28 is one-half of a LAG to building 2.

Here's the problem: To use fiber for all inter-switch connections, I'd need one SFP from each switch to daisy chain to its partner, one SFP to connect the daisy-chained pairs between redundant networks, and 2 each to LAG to the other 3 areas on campus. I had planned to use 2 linked SFPs to connect from the main switches to the other locations, and fiber to daisy chain one switch to the other on each network. We plan to use fiber to connect to additional SG350-28 switches (not daisy chained, FWIW) at three separate points on campus. Since we don't have stacking switches, we plan to daisy-chain two switches together for each network (we need to connect to more ports than one switch would allow). We have two redundant networks set up, called A and B.

We have four Cisco SG350-28 port switches.

Software lag switch safe