we have normally switch from 3Com or HP in our Environment. We used PXE imaging since 7 years now
and it works some time fast some time not so good but it works.
Now we tested imaging with Cisco switches 2950 and it is a pain.

If we have 15 PCs at a configuration

15PCs -->switch1(Cisco)--->swtich2(Cisco)-->server

Some PCs (HP 7800) are able to get the Linux kernel, some PCs not.

If we change this switches with HP all is working fine.

So we think that there must be some special configuration to the Cisco switches, that they also
will work fine.

Maybe some at the forum will know that and could give us a info