[Openib-windows] IPoIB GUID to MAC conversion

William Jordan bjordan.ics at gmail.com
Thu May 26 07:40:29 PDT 2005


On 5/25/05, Fab Tillier <ftillier at silverstorm.com> wrote:
> I meant the Ethernet MAC address reported to the OS.  Method 2 can and
> method 4 will generate different MAC addresses when an instance is
> re-enabled.  On the wire, any packets (like ARP) that include the MAC
> include the 20-byte IPoIB MAC, not the generated 6-byte Ethernet MAC.
> Perhaps the network stack doesn't care about a MAC address changing every
> time the device is enabled.  I don't know.

You would know better than I would, Fab, but I thought Windows tracked
ethernet devices by MAC address, and it would keep generating new
devices if you reported different local hardware addresses everytime
you enable the device.

-- 
Bill Jordan
SilverStorm Technologies



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