Metro-E Spanning tree

Unanswered Question
Mar 12th, 2008

We got one cloud of metro Ethernet consist of 2 unit of 7613 as NPE. Both have serve 5 customers and each of customers are connected via UPEs in separate ring to the both NPE. The issue is both NPE are running MSTP.

For instance 0 = all vlans

instance 1 = vlan 100

instance 2 = vlan 200

All UPEs except 1 ring of customers are using PVST.

That 1 ring customer are using MSTP same like both NPEs.

It happens that trunk between the NPE_A & NPE_B are disconnected.

All customers UPE that running PVST are experience port status "BLK" at the each ring .

Except the one UPE that running MSTP, all UPE in the ring are forwarding.

Why this issue happen in customer that tunning PVST?

Any interoperability issue between PVST & MSTP?

I have this problem too.
0 votes
  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
mchin345 Tue, 03/18/2008 - 14:53

May be mismatch in STP version BPDU packets please check that one or any misconfiguration in your device.

noxkrugger Tue, 03/18/2008 - 21:07

can you explain a little bit detail on how to verify the misconfiguration in our device?

What is the cause of BPDU packets mismatch in STP version?


This Discussion