Shibu Nair wrote: > > May find it very simple but could not find an accurate > answer... Did not > have a lab switch > to try it out... > > If i make a loopback (cross cable) connectivity between 2 ports > within the > switch. > And having the STP enabled on the switch, what would be the > status for the > ports... > > I thought it is "one will be blocking and one will be > forwarding". > > Is that a right statement ?
Yes. The switch ports will see the BPDUs from each other. One will have a lower Port ID so they can use that to make a decision. There's finally a use for the Port ID! :-) > > What if the bridge will act as root bridge (according to > theory, ports on > the root bridge > should be on forward mode) ? But then the loop would be there... This would be an exception. The port with the higher Port ID would defer to what it thinks is a better designated bridge on the other port. IEEE did actually think of this. (I think it's mentioned in the standard anyway. It is definitely mentioned in Radia Perlman's Interconnections book.) You don't need a cross-over cable to test it. You could use a hub and connect 2 of the hub ports to 2 ports on the switch and completely break the hierarchical design model!? Priscilla > > Your advice is appreciated. > Thank you > shibu > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=71403&t=71394 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
