05-06-2016 12:02 AM - edited 03-08-2019 05:38 AM
hi,
after configuring MST
one of the switches I am not sure why it was showing this when I inserted command "show spann vlan 10"
Fa0/19 Mstr FWD 200000 128.21 P2p Bound(PVST)
however MST was configured on this switch. when I shut the port down and bring it up, it changed to:
Fa0/19 Root FWD 200000 128.21 P2p Pre-STD-Rx
what is the port role Mstr? and why when I restarted the port it changed to work normally as root.
also the type shows P2p Pre-STD-Rx while other switches are just P2p
Solved! Go to Solution.
05-06-2016 02:06 AM
Hi
Is this just a LAB as Pre-STD-Rx means your running mst/rstp that's very old incompatible between switches , it will still work but they should be upgraded to newer IOS versions, You could use this command either under the interface spanning-tree mst pre-standard to force it
The mstr FWD is the master port for the uplink root port usually for the CIST in a multi-region MST operation
05-06-2016 02:06 AM
Hi
Is this just a LAB as Pre-STD-Rx means your running mst/rstp that's very old incompatible between switches , it will still work but they should be upgraded to newer IOS versions, You could use this command either under the interface spanning-tree mst pre-standard to force it
The mstr FWD is the master port for the uplink root port usually for the CIST in a multi-region MST operation
05-06-2016 03:03 AM
thanks Mark,
07-26-2017 04:28 AM
I've had that issue when on the same region I had wrong vlan mappings on the same instances in different switches.
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