Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

How to find core switch


Can anyone help me to find out that connected switch is core switch. Is there any command or trick to find it.

There are 7 switches connected but unable to find which is core one .

VIP Purple



The core switch is usually your most powerful switch and depending on the design its the one with routing on it and connected to your firewall , there is no command which will tell you what the core switch is , it will be based on the topology and design of the network , are the switches all layer 2 whats there default-gateway where they are sending traffic too and if there routing where is the routing pointing to that may give you another indication as traffic is usually processed through teh core switch , run a trace from a local pc and see where the traffic path is going whats the last switch it hits before breaking out of the network that's usually your core switch 2 as path goes up through access/distribution layers and hits core and break out to internet or ISP network

New Member

hi Mark,

hi Mark,

Thanks.. It will be really helpful

Cisco Employee

In addition to this if your

In addition to this if your not clear how the switches are all connected check out the 'show cdp neighbors' command. It will show you what switches are connected on each port. Most of the time your core will be the one where either all the switches are connected to or most of them at least. That can be different though depending on what the structured cabling in the building is like.