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Damian Gardner

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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!
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Svet Chinkov

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Damian Gardner

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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?
I was able to find it.  thank you Svet!
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
You are welcome! I am glad I was able to help you with your question

Thanks