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




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