Here is a upgrade of our status. The GS724Tv3 and GS716Tv2 still are failing. I possess the most cutting edge firmware (18.104.22.168) instituted on every one of the six (backbone) switches and the trunk slips up when regarding a week and a part. This intends no movement is living up to expectations and the entire network slips up to work.
The trunk is joined amidst 3 base areas in our raising:
Every T-spot have several 24p switches which are joined through T2 so the true config is similar to this:
The trunk comprises of four UTP Cat5e links of about 80 meters length among the shifting T-spots.
T1 === T2 === T3
T1a == T2a === T3a