Cisco Catalyst 2960-24TT-L Switch

[neilmehta42969453]

Hi everyone,

I have the above mentioned Cisco switch. I am interested in knowing the IP address or the assigned name of devices connected to its individual ports. I am not interested in changing any of the switch's or port's properties.

1Q) Can someone please tell me which Cisco application I can use for this?

2Q) Is there any specific port of it that I can or cannot connect to for this purpose?

Thank you and Happy Thanksgiving,

Neil

[Jaderson Pessoa]

@neilmehta42969453 , Hello!

There are some resources on your own switch that can help you.

Firstly enable this resources whether are disabled.

CDP: Cisco properties

LLDP: Standard Devices

sw(config)# cdp run

sw(config)# lldp enable

they will show to you directly device connected (hostname, ip address, platform and others).

command that can be used:

show cdp neighbors

show cdp neighbors detail

show lldp neihbors

show lldp neighbors detail

There are others commands, check it:

CDP: https://www.cisco.com/c/en/us/td/docs/optical/cpt/r9_3/command/reference/cpt93_cr/cpt93_cr_chapter_01101.html

LLDP: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12-2_37_ey/configuration/guide/scg/swlldp.pdf

Other resource that you can use is the entry arp. 

show arp will show to you information about mac and ip address learning on each interface.

[pieterh]

on the switch (L2 device) issue the command "show mac address-table"

-> capture the output to record what mac address is connected to what interface

on your router (L3 device) issue the command "show ip arp" (could be this same switch?)

-> capture the output to record the relation of MAC-addresses and  IP-addresses

in a spreadsheet sort both lists on mac address and match both lists 

-> result is a combined list "MAC - IP - port"

[julian.bendix]

Hi!

If that is something you want to or need to check more often,
maybe consider enabling DHCP Snooping (if you haven't already).

If you have - you will be able to find MAC Address and IP Address of all connected Clients which obtain their IP Address over DHCP.

Best regards
Julian

[neilmehta42969453]

Thank you so much for your reply. Which software do I need to issue these commands? GNS3 or Cisco Packet Tracker?