Networks·41,468 discussions

Tracing Ip address to a port on cisco switch ?

Locked

Tracing Ip address to a port on cisco switch.

Topic

Clarifications

In reply to Tracing Ip address to a port on cisco switch ?

Clarifications

Try this

In reply to Tracing Ip address to a port on cisco switch ?

form a workstation, ping the ip address. Then open a command prompt and run “arp -a”.
Look for the ip address in the output and write down the corresponding mac address.
convert the mac address to this format xxxx.xxxx.xxxx so that this:
00-15-17-63-cf-dc
becomes
0015.1763.cfdc
Then telnet to the switch and run:
sh mac-address-table | include 0015.1763.cfdc
That should return something like this:
* 10 0015.1763.cfdc dynamic Yes — Gi2/1
where Gi2/1 is the port.

RE: Tracing Ip address to a port on cisco switch

In reply to Tracing Ip address to a port on cisco switch ?

Assuming you have the IP address and the node is online, go to EXEC mode and ping the ip address;
ping xxx.xxx.xxx.xxx
Once the ping is successful you can type: show IP arp.

This will bring up the ARP table, you can find the IP address and locate the mac address next to it. Once you have that you can type:
Show mac-address address {address of MAC in xxxx.xxxx.xxxx format).

Once you issue that command it will give you information about that MAC including the switchport it is connected to.

Get Cisco Network Assitant

In reply to Tracing Ip address to a port on cisco switch ?

Go to the Cisco web site and download the Cisco Network Assitant, its free. It will give you a direct interface, sort of like HP Open, to view your switch and it will tell you what IP address is on which port.

http://www.cisco.com/en/US/products/ps5931/index.html

[Author]

Replies