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Webcast-Catalyst9k
New Member

Portcost value changes after reboot on Cat OS

here is the command on my switch

set spantree portcost 3/1-48 3019

after reboot have noticed many times.. the value changes to someother random value..

Can any one explain whats the reason behind this..

Thanks.

Mahesh.

2 REPLIES
Cisco Employee

Re: Portcost value changes after reboot on Cat OS

Hi Mahesh,

Howdy!!

Can you please confirm that after reboot there is a change in path cost of port cost. As you have manually configured the port cost is should not change for that switchport but yes path cost may change after reboot as switch may found some other best path to reach the root bridge. All depends on topology and your network design.

Just want to confirm when the switch is rebooted does the value you have configured in the command changes in your config or you are checking this with a "sh spantree" command?

Regards,

Ankur

New Member

Re: Portcost value changes after reboot on Cat OS

Hello Ankur,

Its portcost for port 3/42 which is been changed.. earlier its was 3018 and now its been changed to 3019.

Currently not able to find the configs. this was noticed by Nikhil..will check and get back with the configs.

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