Not sure if you are asking a question on this but this is a common practice on Cisco Hardware. Like a 6500 for example uses the same MAC among all the interfaces. This is supported by all Cisco hardware.
Regards, Tyson Scott - CCIE #13513 R&S, Security, and SP Managing Partner / Sr. Instructor - IPexpert, Inc. Mailto: <mailto:[email protected]> [email protected] Telephone: +1.810.326.1444, ext. 208 Live Assistance, Please visit: <http://www.ipexpert.com/chat> www.ipexpert.com/chat eFax: +1.810.454.0130 IPexpert is a premier provider of Self-Study Workbooks, Video on Demand, Audio Tools, Online Hardware Rental and Classroom Training for the Cisco CCIE (R&S, Voice, Security & Service Provider) certification(s) with training locations throughout the United States, Europe, South Asia and Australia. Be sure to visit our online communities at <http://www.ipexpert.com/communities> www.ipexpert.com/communities and our public website at <http://www.ipexpert.com/> www.ipexpert.com From: [email protected] [mailto:[email protected]] On Behalf Of Kingsley Charles Sent: Friday, August 13, 2010 7:20 AM To: [email protected] Subject: [OSL | CCIE_Security] MAC addresses in transparent mode Hi all In both Routed mode and Transparent mode, I see the logical interfaces uses the same MAC address of the physical interface. As per the below statement, the addresses are not unique. VLAN MAC Addresses In routed firewall mode, all VLAN interfaces share a MAC address. Ensure that any connected switches can support this scenario. If the connected switches require unique MAC addresses, you can manually assign MAC addresses. In transparent firewall mode, each VLAN has a unique MAC address. You can override the generated MAC addresses if desired by manually assigning MAC addresses. http://www.cisco.com/en/US/docs/security/asa/asa80/configuration/guide/int55 05.html With regards Kings
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