switch A and B wont talk to each other or cause a loop because you have switch B isolated. STP in your case is set for 3 instances : STP for Vlan 1, Vlan 7 and Vlan 8. A loop would be present if switch B were set for Vlan 7 on both links and STP did not block one of the ports.
pauldongso wrote: >Hi All, > >Please advise how STP participates in the following scenario and why STP >fails to stop the loop? > -------------------- > |switch A | > --------------------- > |(vlan 7) | (vlan 8) > | | > | | > |(vlan 1) |(vlan 1) > ------------------- > | switch B | > -------------------- > | | | > vlan 1 hosts > > >In short, switch A has two ports configured with vlan 7, vlan 8 >respectively. Swtich B all ports are at default vlan 1. >links between swA and swB are access mode. > >This scenario creates bridging loop. But just can't figure out why STP >fails to stop loop. > >Thanks in advance. > >Paul Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=58150&t=58099 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
