Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Stacking issues -> STP

Hi guyz, i'm wondering about the stp issues for stacking. i got 2 switch and they are stacked, and i also pull a UTP cable to connect this 2 swtich as a uplink trunk port.

1)Am i goin to face STP looping issues in this scenario?

2)theoretically, STACKING is logically combines 2 switches to form a logical switch. So ther should'n have looping issue in the scenario, am i rite ?

Thanks in millions

William

3 REPLIES
Super Bronze

Re: Stacking issues -> STP

Hi

It depends a lot on what stacking technology you are using...

If you have 3750s with the stackwise connectors, then you effectively have a single switch... You also wouldn't need the extra UTP cable as the stackwise connectors form a redundant ring topology...

Regards

Aaron

Please rate helpful posts...

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
Community Member

Re: Stacking issues -> STP

but what if customer accidentally connect a a extra UTP cable ?

Super Bronze

Re: Stacking issues -> STP

Hi

In that case the switch will see the BPDUs (it's own BPDUs actually) and will then put the port into spanning-tree blocked state to break the loop.

Regards

Aaron

Please rate helpful posts...

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
162
Views
0
Helpful
3
Replies
CreatePlease to create content