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TOPIC: Switch Trouble shooting problem

Switch Trouble shooting problem 14 years 1 month ago #6779

Can you please any one help me out from this problem
In the cisco switch ,How to see which switch port is connected to which {it should display switch port f0/1 is connected to IP address etc. (IP address of that particular end device )}
please tell me the command to monitor on the switch .

Re: Switch Trouble shooting problem 14 years 1 month ago #6780

You can use this command.

show ip interface brief

or show ip route .

Re: Switch Trouble shooting problem 14 years 1 month ago #6783

Thanks for your answer but it's not giving my desired output
this command is giving static entry ip address of the particular port i want a device which is connected to this ports.
I want which ip address device (hosts or routers ..) is connected to which switch port.
PC's are connected to switch ports , i want one command to see which ip address (Host)is connected to which ports
Like this

IP is connected to switchport f0/1
Ip is connected to switchport f0/2 so somethin like this.

Re: Switch Trouble shooting problem 14 years 1 month ago #6788

Erm... hmm *scratches head*

You should be able to pull that information out of the device using SNMP pretty easily.
Sahir Hidayatullah. Staff - Associate Editor & Security Advisor

Re: Switch Trouble shooting problem 14 years 1 month ago #6789

  • Chris
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I'm not sure if there is a command that will provide the output you require, but you can use:

'show ip arp'

which will provide you the following output:

Cat3550-ITDept2#sh ip arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 61 000b.4668.c080 ARPA Vlan1
Internet 142 000b.4668.c080 ARPA Vlan1
Internet 140 000b.4668.c080 ARPA Vlan1
Internet - 000f.f7b5.e280 ARPA Vlan1
Internet 43 000b.4668.c080 ARPA Vlan1
Internet 3 000b.4668.c080 ARPA Vlan1

And then type 'show cdp neig details' to get a full list of other cisco equipment and their IP addresses.

There are a variety of subcommands under 'Show IP arp' , give them a try and see if they do the job for you.

Chris Partsenidis.
Founder & Editor-in-Chief
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