How do I find the MAC address of an IP address associated with our ASA firewall?

Hello - we have Microsoft troubleshooting a DHCP-related case for us, and they're seeing traffic coming from an IP address that is tied to our ASA gateway firewall. There are 2 subnets going thru our network, so there are 2 IP gateway IP's associated with our firewall - 192.168.1.254 and 192.168.5.254. They're asking for the MAC address of the 192.168.5.254 IP. How do I find this? I'm trying Experts Exchange to see if its faster than asking Cisco. I've Googled it for 15 minutes and am not finding the answer so far.

thanks!

Hardware FirewallsCiscoNetworking

Last Comment

Svet Chinkov

8/22/2022 - Mon

ASKER CERTIFIED SOLUTION

Svet Chinkov

11/2/2017

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Damian Gardner

11/2/2017

ASKER

hello Svet - thanks for your reply. how do I first identify which interface is tied to which IP address? or do I just show ALL and look for it?

Damian Gardner

11/2/2017

ASKER

I was able to find it. thank you Svet!

Svet Chinkov

11/2/2017

Hi,

When you issue the command show ip interface gi0/0 for exaple you will see the IP address and MAC address associated with that interface. Please let me know if that works.

Thanks

Your help has saved me hundreds of hours of internet surfing.

fblack61

Svet Chinkov

11/2/2017

You are welcome! I am glad I was able to help you with your question

Thanks