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TOPIC: Can you find the switch IP address

Can you find the switch IP address 11 years 8 months ago #7651

  • swardl100
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HI,

Does anyone know how to find out the Cisco switch IP address thats attached to another Cisco switch?

I have a new network with no documentation and no way of chasing the fibres through walls.

Cheers.
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I found it 11 years 8 months ago #7652

  • swardl100
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Typical, I just found it......

"Show cdp neighbors", what would you use if cdp wasn't running?
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Re: Can you find the switch IP address 11 years 8 months ago #7773

  • apit
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shall u share with us?
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Re: Can you find the switch IP address 11 years 8 months ago #7775

  • tiamat
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he already gave us the info. the command is 'show cdp neighbors detail'. his new question is, how would you find that info out if cdp wasn't running on one of the switches?
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Re: Can you find the switch IP address 11 years 8 months ago #7777

  • LooseCannon
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Well if you knew what port the remote switch was plugged into on the local switch you could do a 'sh port <port #>' in CatOS or a ' sh int fa# status' in IOS and that will show you the MAC address of the remote switch. From there you would have to go into the router and look at the ARP table with a 'sh ip arp' or you might be able to do a 'sh ip arp <MAC address>' and that will display the IP to MAC address mapping for you.

Other than that I don't know of any other way because normal layer 2 switches don't have ARP tables, thus they don't have any IP->MAC address mappings so there is no way to find out a neighbouring switch's IP without looking at a router in charge of the segment.
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Re: Can you find the switch IP address 11 years 8 months ago #7906

  • Shocker
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Is it possible to use Arp or tracert to detect the IP Address of the switch?
Senior Product Support Specialist
Linksys A Division of Cisco

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