DHCP on VLAN
Tim Peiffer
peiffer at umn.edu
Sat Feb 24 17:07:31 UTC 2007
This is really a question for either Ted or ISC. When I was
experimenting, I created my 30 vlans and I ended up patching a few
things to make it work. Since then, I have had a number of 'upgrades'
to change out to GigE hardare, and reimplement DHCPD to account for the
current code and the limit on VLAN's hasn't shown up since. I remember
there was an error message shortly after startup that indicated that
there wasn't any room left on the stack for numbers of interfaces.
I would think that one limiting part of any multi-homed environment is
the amount of non-unicast traffic that the server sees. Every broadcast
packet creates an interrupt and has to be inspected.
Ted or ISC - do you know of any current limits on the number of
interfaces used for dhcpd?
Tim Peiffer
Networking and Telecommunications Services
University of Minnesota
> Secondary question of my own ...
>
> I've just set up a Debian Etch box doing VLAN trunking to a switch
> (for a multi-tennant gateway). DHCP appears to work fine on all the
> virtual interfaces, are there any 'gotchas' I should be aware of ?
>
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