Wired Intelligent Edge

Hello,

What is the CLI command which will yield the IP address of the device connected to a particular switch port and IP addresses connected to all switch ports?

Thanks,

Scott

hi

ProCurve Switch 3500yl-24G-PoEP# sh arp

 IP ARP table

  IP Address       MAC Address       Type    Port
  ---------------  ----------------- ------- ----
  10.0.50.1        0017c5-b0c221     dynamic 24
  10.0.50.43       f0def1-e26019     dynamic 13

That will only work if the switch has actually contacted those hosts via IP, e.g. if it is acting as their router, or if you've pinged it from the switch on the same VLAN.  If routing is not turned on in the switch, the best approach is probably to use a tool like Linux nmap to ping all addresses in the VLAN, then review the MAC address table from the switch.

paulgear is correct. What you are asking for is not actually the job of a L3 switch. The IP/MAC/Port details are transient and will appear in and time out of the switch's cache as necessary (this is just how Ethernet works and how it dynamically converges in the event of topology changes). All you can do is use different tools to gather the info you need. For example:

• An IP scan followed by "show arp"
• show mac-address
• show lldp info remote (will tell you adjacent switches/phones/misc stuff)
• show cdp neighbours (similar to above)

PRW

Works perfectly for me with nmap and sh arp [port]

Export the nmap result to file and search for the mac of the port in the export file

hi

i need to know the cli command to check the ip address connected to port 10 of hp core switch. In port 10 of core switch its a fibre cable connected to a different switch.

how to find out the ip address of the port 10

is it possible to check the connectivity of port 10 which is connected to a switch with the ip address

Biju

Hello guys try this command

show lldp info remote command

this one works perfect

show lldp info remote-device

also theres local device

I know this is a super old post, but none of the answers really gave me what I wanted for an Aruba Switch.

This is the command that did the trick for me:

show cdp neighbors detail

This shows each port with IP Address, MAC Address and some additional info.

Let say the switch and device that connected has different subnet

SW: 192.168.0.1
DEVICE: 10.0.0.10

# show arp
# show cdp neighbors detail
can get arp of the device, but can't get ip or subnet of it

I can't see as well in
# debug all