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duplicate MAC addresses on Fa0 and VLAN1 - Why?

Gerard Roy
Level 2
Level 2

‎10-06-2008 01:13 PM - edited ‎03-11-2019 06:53 AM

Can anyone explain why I have duplicate MAC addresses? It is a 1711 router with NAT and should VLAN1 adopt the mac of the LAN switch interface it is plugged into?

Internet 67.234.10.95 - 0016.c791.73de ARPA FastEthernet0

Internet 192.168.1.1 - 0016.c791.73de ARPA Vlan1

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2 Replies 2

abinjola
Cisco Employee
Cisco Employee

‎10-06-2008 09:55 PM

whos burnt in MAC is this ?

0016.c791.73de

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Gerard Roy
Level 2
Level 2
In response to abinjola

‎10-07-2008 08:50 AM

That is Cisco own Mac address:

http://www.coffer.com/mac_find/?string=0016.c791.73de

Any other Ideas?

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