ipxe/wds pxeboot.n12 client responding to icmp

[muzz]

Hi There,

bits 1 & 2 of the first octet of a mac address define unicast/multicast and hardware/locally administrered.
http://en.wikipedia.org/wiki/MAC_address...ss_details

this problem only occurs when ipxe has chainloaded wdsnbp.com and bootmgr is downloading a .wim image to boot. In my case where I absolutely need to fail back and boot a host via wds I have a menu option for this:
chain tftp://${wdsserver}/boot%5Cx86%5Cwdsnbp.com

during this time, any packets with the multicast bit set that hit the interface of the client are responded to - so the client is responding to an icmp packet where the destintion address isnt its own.

wimboot does not exhibit this behaviour. Oddly enough, native wds clients in the process of downloading an image do not respond to icmp requests either - it is just the combination of ipxe/wds.

(2013-09-01 15:26)robinsmidsrod Wrote:  Not familiar with NLB and multicast MAC addresses. Would you care to point to some docs or give a brief explanation?

Does the same thing happen if you use wimboot to load the .wim file?