Solved: Catalyst 9500 Rapid pvst cost

Srin_G · ‎11-22-2022

Hi,

I have connected 2 pairs of Cisco 9500 in a L2 etherchannel. The STP cost to the root pair 9500 is showing 1000? Is this right?

I am testing this in the lab at the moment. Any ideas why the cost is showing high? The optics are 10Gbps.

Regards

MHM Cisco World · ‎11-23-2022

friend there are two mode of cost
short (OLD)
and long
as I see you use long cost mode.
for more info. check link below
https://packetlife.net/blog/2008/sep/5/spanning-tree-port-costs/

MHM Cisco World · ‎11-23-2022

friend there are two mode of cost
short (OLD)
and long
as I see you use long cost mode.
for more info. check link below
https://packetlife.net/blog/2008/sep/5/spanning-tree-port-costs/

Srin_G · ‎11-23-2022

Thank you, I checked and the default path cost method for cat9500 is long indeed!

MHM Cisco World · ‎11-23-2022

You are so so welcome