[c-nsp] Broadcast forwarding on an FWSM

[John Neiberger]

On 7/19/06, Asbjorn Hojmark - Lists <lists at hojmark.org> wrote:
> > Is it possible to do broadcast forwarding (for DHCP and PXE)
> > through an FWSM? I'm looking for something similar to IP helper
> > addresses and directed broadcasting.
>
> If you have a router in front of the FWSM, it'll work fine. The
> FWSM won't know that the unicast is in fact ip helpered traffic
> or a directed broadcast.
>
> You can also configure dhcp relay on the FWSM itself (look up
> 'dhcprelay' in the docs).
>
> I don't believe, however, that the FWSM will send a directed
> broadcast as a link-level broadcast to one of it's own subnets.

DHCP relay might work for the DHCP stuff, but I don't know if it's
going to work for the PXE stuff. I'll have to check into that.

Thanks!
John