MST Topology Changes

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oldsk00l
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Posts: 3
Joined: 08 Jun 2016 07:23

MST Topology Changes

Post by oldsk00l »

Hi,

we have an Cisco2960s, 3750x and OS6450 mixed L2 network here. All switches are running mstp with same mstp config.
we often see STP Topology Changes on "show log swlog":

STP info Topology changed on VLAN/STP id 0

We would like to know the interface where the TC was received to find the root cause. (Like "show spanning-tree detail" on cisco)

Is there any command to identify the Port?
Or should we enable any advanced debug to see it in swlog?

THX!

silvio
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Location: Germany

Re: MST Topology Changes

Post by silvio »

in the newest releases (since ca. 1 year) you can see the source of the last tc-port with the command "show spantree cist". Before it was only possible with debug commands.
regards
Silvio

oldsk00l
Member
Posts: 3
Joined: 08 Jun 2016 07:23

Re: MST Topology Changes

Post by oldsk00l »

YES!

Topology Changes : 566,
Topology age : 02:08:08,
Last TC Rcvd Port : Slot 1 Interface 50,

thank you!

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