cdp

[NIRAJJHA]

I am getting cisco switches while entering cdp neighbour command but i am not directly connected to those switches rather a HP switch is in betweenmy cisco switch and another  cisco switch how to solve this issue?

[Martin L]

You could run LLDP on HP switch and get some info if Cisco is set to run LLDP. otherwise, you will need access to Cisco device to see CDP.

There are some 3rd party software to manage, discover, and map network devices

Regards, ML
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[Sergiu.Daniluk]

Hi @NIRAJJHA 

Use LLDP for discovery and enable igmp snooping on HP switch (to stop the CDP packets to be flooded).

Cheers,

Sergiu

[paul driver]

Hello

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@NIRAJJHA wrote:

I am getting cisco switches while entering cdp neighbour command but i am not directly connected to those switches rather a HP switch is in betweenmy cisco switch and another  cisco switch how to solve this issue?

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Do you mean you can see each cisco switch in their cdp database even though they are both directly connected between a HP switch?

[Richard Burts]

I am somewhat puzzled about the original post. It indicates that there are cisco switches with a non cisco switch between them and that the cisco switches see each other in the output of show cdp neighbor. This is the expected behavior. cdp uses a mac address that other cisco devices will recognize and process. But non cisco devices do not recognize the mac address and just forward the frame.

So if you have 3 switches connected: sw1 to sw2 to sw3 and all are cisco switches then sw1 sends cdp frame and sw2 recognizes and processes it and does not forward to sw3. But if sw2 is not a cisco switch then sw1 sends cdp frame to sw2 which does layer 2 forwarding and the frame goes to sw3. So now sw1 and sw3 see each other as neighbors.

The original post seems to see this as an issue that needs to be solved. I do not understand what the issue is and would appreciate some clarification.