On Mon, Apr 10, 2023 at 08:14:49AM -0700, Jillian Alana Bolton wrote:
> On Mon, Apr 10, 2023 at 09:17:01AM +0200, Otto Moerbeek wrote:
> > On Thu, Apr 06, 2023 at 12:13:50PM -0700, Jillian Alana Bolton wrote:
> >
> > >
> > > >Synopsis: dhcpd(8) does not offer fixed addresses
> > > >Category: user
> > > >Environment:
> > > System : OpenBSD 7.2
> > > Details : OpenBSD 7.2 (GENERIC) #728: Tue Sep 27 11:49:18 MDT 2022
> > >
> > > dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
> > >
> > > Architecture: OpenBSD.amd64
> > > Machine : amd64
> > > >Description:
> > > I want to offer fixed addresses to some clients in an otherwise
> > > dynamically assigned network. I tried Following the example at
> > > https://www.openbsd.org/faq/pf/example1.html#dhcp and the expected
> > > behavior is that the client with MAC address 52:54:00:84:7f:c9
> > > would receive a DHCPOFFER for address 191.168.101.21. Instead,
> > > the DHCPOFFER specifies 192.168.101.128.
> > >
> > > If I remove the 'range' declaration, the client received no
> > > DHCPOFFER.
> > > >How-To-Repeat:
> > > pwt01-gw1# cat /etc/dhcpd.conf # THIS IS THE SERVER
> > > subnet 192.168.101.0 netmask 255.255.255.0 {
> > > range 192.168.101.128 192.168.101.196;
> > > host pwt01-web01 {
> > > fixed-address 191.168.101.20;
> > > hardware ethernet 52:54:00:6b:b4:3e;
> > > }
> > > host pwt01-web02 {
> > > fixed-address 191.168.101.21;
> > > hardware ethernet 52:54:00:84:7f:c9;
> > > }
> > > }
> > >
> > > pwt01-web02# ifconfig vio0 # THIS IS THE CLIENT
> > > vio0: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,AUTOCONF4>
> > > mtu 1500
> > > lladdr 52:54:00:84:7f:c9
> > > index 1 priority 0 llprio 3
> > > groups: egress
> > > media: Ethernet autoselect
> > > status: active
> > > pwt01-web02# dhcpleasectl vio0
> > > .
> > > vio0 [Bound]
> > > inet 192.168.101.128 netmask 255.255.255.0
> > > lease 12 hours
> > > dhcp server 192.168.101.2
> > > pwt01-web02#
> > >
> > > >Fix:
> > > <how to correct or work around the problem, if known (multiple lines)>
> >
> > This is likely not a bug. You config looks OK and I have been using a
> > very similar config for years.
> >
> > Some questions:
> >
> > - Did you restart dhcpd?
> > - Show the logs of a lease request by pwt01-web02
> >
> > -Otto
>
> I found the cause late last night! I have an off-by-one
> error in the first octet of my fixed-address declarations.
>
> > > subnet 192.168.101.0 netmask 255.255.255.0 {
> > > range 192.168.101.128 192.168.101.196;
> > > host pwt01-web01 {
> > > fixed-address 191.168.101.20;
> ^^^
> > > hardware ethernet 52:54:00:6b:b4:3e;
> > > }
> > > host pwt01-web02 {
> > > fixed-address 191.168.101.21;
> ^^^
> > > hardware ethernet 52:54:00:84:7f:c9;
> > > }
> > > }
>
> I did restart dhcpd with: rcctl restart dhcpd
>
> If you still want the logs, do you mean from rsyslogd(8)
> or something like tcpdump(8)?
>
> Jillian
/var/log/daemon
-Otto
