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Date: Mon, 26 May 2003 10:06:27 +0200
From: Attila Nagy <bra@fsn.hu>
Organization: Free Software Network Foundation - http://www.fsn.hu/
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To: "Eric W.Bates" <ericx@vineyard.net>
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cc: net@freebsd.org
Subject: Re: A problem with too many network interfaces
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Eric W.Bates wrote:
> I'm trying to build a router/filter on FreeBSD 4.8 with 4 real NIC and
> 32 vlan interfaces.
> Starting dhcpd generates an error after 15 interfaces:
> "[interface] not found"
> My C skills are lacking so while I'm grovelling thru dhcpd source to
> find the problem; I was wondering if anyone knows of a kernel limit I
> need to increase?
It has nothing to do with FreeBSD.
Take a look at common/discover.c to find the following code snippet:

void discover_interfaces (state)
         int state;
{
         struct interface_info *tmp, *ip;
         struct interface_info *last, *next;
         char buf [2048];
                   ^^^^
Increase the size of buf for example to 32768 and it will work.

-- 
Attila Nagy                                   e-mail: Attila.Nagy@fsn.hu
Free Software Network (FSN.HU)           phone @work: +361 210 1415/127
ISOs: http://www.fsn.hu/?f=download            cell.: +3630 306 6758