Weird question but does anyone know if the MAC addresses on an ASA5505 is on the label on the box anywhere? I am pretty sure the serial number is there. I have an ISP that needs the MAC address and the device has already been shipped to non-techies.
I have a couple of ASA5505 units at home and they dont have any information of the MAC address and to be honest I am not sure if the MAC address can always be the same. The MAC address visible to the ISP will be the MAC address of the Vlan interface that is facing the ISP.
I would imagine that the ISP can see the MAC address of the unit when they have connected it to the local WAN connection even if it doesnt get an address.
You might also be able to connect to some network device that acts as a DHCP server and remotely check the DHCP server so you can find out the MAC address of the ASA unit.
I guess there is no "easy" way to get the MAC address then other than to have the people that got the device console into the device as John said. That is if they have a laptop with the proper port. Then they can just get Putty for example and console into the ASA. Should not really be hard for anyone.
Seems to me that my ASA for example uses the Internet-Data0/0 interfaces MAC address for all the Vlan interfaces and this will be the MAC address which shows to the ISP if it for example wants to bind your ASA MAC address to a IP address that the DHCP server will always allocate to this device only.
Some output from my ASA5505 for example (partial outputs)
ASA# sh ver
0: Int: Internal-Data0/0 : address is 0025.45f4.0aa2, irq 11
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
[toc:faq]Introduction:This document describes details on how NAT-T
works.Background:ESP encrypts all critical information, encapsulating
the entire inner TCP/UDP datagram within an ESP header. ESP is an IP
protocol in the same sense that TCP and UDP are I...