what is the recommended temperature ideally for a cisco switch placed in a data center or hubroom? How much is the required gap (in terms of U in rack)  between 2 switches mounted on a rack?

Gi1/0/34 auto Pair A 38 +/- 1 meters Pair B OpenPair B 40 +/- 0 meters Pair A NormalPair C 39 +/- 1 meters Pair C ShortPair D 39 +/- 1 meters Pair D Short This is the above output for tdtr, it shows that there is short in pair c and pair d. Can anyon...

If there is a new cisco switch, other than referring the datasheet of the switch how do i know the speed capacity for the sfp port switch before connecting the sfp transceiver module? From the cli how to check it ?Is there any command for it?

If I connect a cable between 2 ports on the same switch loop will come, if so how to avoid the loop even if it is done by mistake?Any particular commands to avoid this issue for future?

I have a tested a tdr cable diagnostic with changing 2 lan cables for a pc  from the same interface itself.Below are the ouputInterface Speed Local pair Pair length Remote pair Pair status--------- ----- ---------- ------------------ ----------- ----...