04-27-2021 12:39 AM
We have two Cisco 9k running as our cores. They run as a pair, if one goes down the other takes over. We have around 20 vlans all seeing as Cisco 9K SW1 as root. Can i add secondary root command to Cisco 9K SW2 baring in mind they are both seen as one whole switch. The root primary commands only appears on Cisco 9K SW1.
04-27-2021 01:37 AM
Cisco 9K ( is this catalyst 9K - what model ?) or Nexus 9K ?
is this stacked or stackwise virtual ? root in terms of Spanning treed ?
you can add higher value than in the Primary so other switch become secondary of the primary go down.
example :
Primary vlan priority 4K
Secondary vlan priority 8K
04-27-2021 01:42 AM
Thanks for the quick response. The switches a stackwise virtual. We have mirrored vpcs running on each. OK so from what your saying i can add the Cisco 9K sw2 as secondary root.
04-27-2021 02:46 AM
You still not confirmed the Model of the Devices ?
The switches a stackwise virtual. - If this stack wise virtual ( Physically 2, but logically 1 only ) - You do not need to configure spanning tree seconday (not you get option to change anything on the passive device)
We have mirrored vpcs running on each.
this confusiing to me ( is this nexus ?)
04-27-2021 03:50 AM - edited 04-27-2021 03:50 AM
The deice is a Nexus C93180YC-EX. The device is stacked and not stackwise virtual.
04-27-2021 04:26 AM - edited 04-27-2021 06:23 AM
Nexus C93180YC-EX.
Nexus work in different way (nor it stacked or SWV) - they work as vPC in teh domain
You can make priorties as suggested for spanning tree ( if required) - most case you do not need.)
04-27-2021 06:12 AM
Hello
if they are logically stacked - vss-vpc-stackwise then the stp root priority should be the same
What stp mode are you running?
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