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arp-scan shows invalid ip with mac address

Posted on 2011-02-11
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Last Modified: 2012-06-21
I ran an arp-scan on my network today and noticed something weird along with our normal addresses:
192.168.1.0      88:43:e1:76:af:4f      (Unknown)
192.168.1.0      68:ef:bd:df:1c:78      (Unknown) (DUP: 2)

Anyone ever seen invalid or .0 addresses show up like this?

Thanks in advance!
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Question by:bbrunning
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Matt V earned 2000 total points
ID: 34875029
Both of those are Cisco MAC addresses, I would suspect you have interfaces with no IP address that bridge to addressed VLAN or Loopback interfaces.  
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by:bbrunning
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That was it!

Thanks
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