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[Xen-users] Re: 2 NIC HVM's not working properly.

To: Xen-users <Xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] Re: 2 NIC HVM's not working properly.
From: Martin Leben <martin2006@xxxxxxxx>
Date: Fri, 30 Nov 2007 00:59:09 +0100
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Sadique Puthen wrote:
David Todd wrote:
vif = [ 'type=ioemu, mac=00:16:3e:4c:69:28, bridge=xenbr0', 'type=ioemu, mac=01:16:3e:4c:69:28, bridge=xenbr1' ]

It's because the mac address for the second NIC is not from the reserved range for xen. Use a mac address from 00:16:3e:xx:xx:xx.



Sadique's advice to use 00:16:3e:xx:xx:xx is correct, but the reason that "01:16:3e:4c:69:28" doesn't work is because it is a broadcast address. Nothing else.

A broadcast address is specified by setting the least significant bit in the most significant byte is set to 1. See <http://en.wikipedia.org/wiki/MAC_address>.

(And by the way, you can pick any MAC address that begins with "x2", "x6", "xA" or "xE". They are so called "locally administered addresses" and their first byte is binary "xxxxxx10".)

Best regards,
/Martin Leben

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