High Bpdus (MRecords) sent 14204303, received 44682

Unanswered Question
Nov 13th, 2008

I am running MST01 on my network.all the GIG ports are getting connected to leaf switches like 3560 and 4948.when I do the command

"show spanning-tree mst 1 detail" I see that BPDU received on port 3/44 is very high than any other ports .Iam doign this command on the root bridge .

what could be cuasing these BPDU recieve to go high on the root bridge

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Giuseppe Larosa Thu, 11/13/2008 - 01:49

Hello Ajai,

it looks like out that port there is a device that doesn't agree on the root bridge id.

verify the MST region config on the device because if a parameter is mismatching both devices think to be in different regions

OR the device is root bridge for one MST instance

Hope to help

Giuseppe

athambi Thu, 11/13/2008 - 02:26

this is the config of MSt on root

spanning-tree mode mst

no spanning-tree optimize bpdu transmission

spanning-tree extend system-id

spanning-tree vlan 1-999 priority 12288

!

spanning-tree mst configuration

instance 1 vlan 1-999

!

spanning-tree mst 0-1 priority 8192

The below is the confg for the leaf switch

spanning-tree mode mst

no spanning-tree optimize bpdu transmission

spanning-tree extend system-id

spanning-tree vlan 1-999 priority 61440

!

spanning-tree mst configuration

instance 1 vlan 1-999

!

spanning-tree mst 0-1 priority 61440

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