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03-28-2014 01:16 PM
03-28-2014 01:16 PM
CST Root priority
When I do a show spanning-tree I get the following result. If the switch priority is 0 then why would the CST root priority have a different MAC address? Can I change the priority of the CST root
Multiple Spanning Tree (MST) Information
STP Enabled : Yes
Force Version : MSTP-operation
IST Mapped VLANs : 1-4094
Switch MAC Address : 8851fb-d08a00
Switch Priority : 12288
Max Age : 20
Max Hops : 20
Forward Delay : 15
Topology Change Count : 12,161
Time Since Last Change : 9 mins
CST Root MAC Address : 000e7f-50a2c0
CST Root Priority : 0
CST Root Path Cost : 240000
CST Root Port : B24
IST Regional Root MAC Address : 8851fb-d08a00
IST Regional Root Priority : 12288
IST Regional Root Path Cost : 0
IST Remaining Hops : 20
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04-02-2014 03:05 AM
04-02-2014 03:05 AM
Re: CST Root priority
I'm not sure I entirely understand the question: the switch you are logged onto has priority 12288; the CST root has priority 0. If you want to change the priority of the CST root switch, do it from there, if you're sure you want to change the root.