RE: Same Wire Different Vlans

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Without the shared-network statement the dhcpd will not bind to any of the 
subnets since it has an ip on fxp0 of 198.182.X.X 255.255.255.0
unless anyone has any ideas here is the error starting up and here is the 
conf file
as of now

xxxx# dhcpd -t
Internet Software Consortium DHCP Server V3.0pl2
Copyright 1995-2003 Internet Software Consortium.
All rights reserved.
For info, please visit http://www.isc.org/products/DHCP
xxxx# dhcpd
Internet Software Consortium DHCP Server V3.0pl2
Copyright 1995-2003 Internet Software Consortium.
All rights reserved.
For info, please visit http://www.isc.org/products/DHCP
Wrote 23 leases to leases file.

No subnet declaration for fxp0 (198.182.157.37).
** Ignoring requests on fxp0.  If this is not what
    you want, please write a subnet declaration
    in your dhcpd.conf file for the network segment
    to which interface fxp0 is attached. **


Not configured to listen on any interfaces!

If you did not get this software from ftp.isc.org, please
get the latest from ftp.isc.org and install that before
requesting help.

If you did get this software from ftp.isc.org and have not
yet read the README, please read it before requesting help.
If you intend to request help from the dhcp-server@xxxxxxx
mailing list, please read the section on the README about
submitting bug reports and requests for help.

Please do not under any circumstances send requests for
help directly to the authors of this software - please
send them to the appropriate mailing list as described in
the README file.

exiting.

default-lease-time              86400;
max-lease-time                  86400;
option domain-name              "calarts.edu";
option domain-name-servers      198.182.157.34, 198.182.157.25;
ddns-update-style               none;

#Vlan 19 - Administration
subnet 172.19.0.0 netmask 255.255.0.0 {
         range 172.19.0.10 172.19.0.254;
         option routers 172.19.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 20 - Art School
subnet 172.20.0.0 netmask 255.255.0.0 {
         range 172.20.0.10 172.20.0.254;
         option routers 172.20.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 21 - Butler Buildings
subnet 172.21.0.0 netmask 255.255.0.0 {
         range 172.21.0.10 172.21.0.254;
         option routers 172.21.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 22 - Film/Video Labs
subnet 172.22.0.0 netmask 255.255.0.0 {
         range 172.22.0.10 172.22.0.254;
         option routers 172.22.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 23 - Housing Office
subnet 172.23.0.0 netmask 255.255.0.0 {
         range 172.23.0.10 172.23.0.254;
         option routers 172.23.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 24 - Library Labs
subnet 172.24.0.0 netmask 255.255.0.0 {
         range 172.24.0.10 172.24.0.254;
         option routers 172.24.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 25 - Music School
subnet 172.25.0.0 netmask 255.255.0.0 {
         range 172.25.0.10 172.25.0.254;
         option routers 172.25.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 26 - Other/Misc.
subnet 172.26.0.0 netmask 255.255.0.0 {
         range 172.26.0.10 172.26.0.254;
         option routers 172.26.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 27 - Theater School
subnet 172.27.0.0 netmask 255.255.0.0 {
         range 172.27.0.10 172.27.0.254;
         option routers 172.27.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 28 - Galleries
subnet 172.28.0.0 netmask 255.255.0.0 {
         range 172.28.0.10 172.28.0.254;
         option routers 172.28.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 29 - Dorms/Ahmanson
subnet 172.29.0.0 netmask 255.255.0.0 {
         range 172.29.0.10 172.29.0.254;
         option routers 172.29.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 30 - Dorms/Chouinard
subnet 172.30.0.0 netmask 255.255.0.0 {
         range 172.30.0.10 172.30.0.254;
         option routers 172.30.255.254;
         option subnet-mask 255.255.0.0;
}
#Vlan 31 - Studios
subnet 172.31.0.0 netmask 255.255.0.0 {
         range 172.31.32.10 172.31.32.250;
         option routers 172.31.255.254;
         option subnet-mask 255.255.0.0;
}






At 09:38 AM 1/27/2003 -0800, you wrote:
>    *** From dhcp-server -- To unsubscribe, see the end of this message. ***
>
>
>
>
>Just out of curiosity our Microsoft NT 4 server is running ms-dns, is not
>trunked, has the "ip helper-address" added to the msfc vlan interfaces just
>like the FreeBSD isc-bind box and it responds to all querys on diffrent
>vlans.  How is this possible?
>
>We are going to trunk the FreeBSD port like you said so it will hear
>everything and just have a straight conf file no "shared-network".  Can you
>explain to me with what shared-network is really used for?  I'm confused I
>thought it was for giving addresses out on networks not addressed to the
>physical adapter.
>
>Thanks
>
>At 11:15 PM 1/26/2003 +0200, you wrote:
> >    *** From dhcp-server -- To unsubscribe, see the end of this message. ***
> >
> >
> >The thing is, if you're running proper VLANS, as you seem to be with a Cisco
> >6000 switch + MSFC, then the subnets are *not* all on the same wire. If you
> >don't have a ISL or 802.1q trunk connection from your DHCP server to the
> >switch then the server is (most likely) in one subnet. If you where running
> >a trunk connection you would have a multitude of logical interfaces for the
> >VLANs.
> >
> >In the context of the ISC-DHCP server a "shared network" is where two or
> >more subnets are configured on the same interface, logical or physical. They
> >are declared "shared" so that the DHCP server knows it can hand out leases
> >from either subnet to booting hosts connected to that interface. VLANs do
> >not infer shared networks, so, you shouldn't be declaring your remote
> >subnets - beyond the router (MFSC) - as being shared along with the subnet
> >local to your server, they are, obviously, not on the same interface.
> >
> >To summarize, get rid of the "shared network" declaration until you know for
> >sure you need it.
> >
> >Regards Mike D.
> >
> >-----Original Message-----
> >From: dhcp-server-bounce@xxxxxxx [mailto:dhcp-server-bounce@xxxxxxx]On
> >Behalf Of Patrick Nixon
> >Sent: Saturday, January 25, 2003 1:38 AM
> >To: dhcp-server@xxxxxxx
> >Subject: Re: Same Wire Different Vlans
> >
> >
> >    *** From dhcp-server -- To unsubscribe, see the end of this message. ***
> >
> >
> >Have you configured your 'ip helper-address on the MSFC?
> >
> >Each interface vlan## needs one pointing to the DHCP Server's IP.
> >
> >--Pat
> >
> >On Fri, 2003-01-24 at 14:21, Sean Murphy wrote:
> > >    *** From dhcp-server -- To unsubscribe, see the end of this message.
> >***
> > >
> > >
> > > I believe it is operating on the ethernet adapter.  here is the start up
> >of
> > > what it is currently doing it is similar but it is not using the same 
> conf
> > > file so at least it will give out address to the 31 vlan.
> > >
> > > I get this same message but it has the shared-network name on it and fxp0
> > > is the network card on it.
> > >
> > > if you need the exact one I will have to change it during lunch
> > >
> > > thanks for your help
> > >
> > >
> > >
> > > thebe# dhcpd
> > > Internet Software Consortium DHCP Server V3.0pl2
> > > Copyright 1995-2003 Internet Software Consortium.
> > > All rights reserved.
> > > For info, please visit http://www.isc.org/products/DHCP
> > > Wrote 11 leases to leases file.
> > > Listening on BPF/fxp0/00:d0:b7:9d:90:79/172.31.0/16
> > > Sending on   BPF/fxp0/00:d0:b7:9d:90:79/172.31.0/16
> > > Sending on   Socket/fallback/fallback-net
> > >
> > >
> > > At 06:09 PM 1/24/2003 +0000, you wrote:
> > > >    *** From dhcp-server -- To unsubscribe, see the end of this message.
> >***
> > > >
> > > >
> > > >
> > > ><snip>
> > > >
> > > > > the first subnet it answers on and the server has the ip on that
> >networ=
> > > >k.
> > > > > =
> > > >
> > > > > the second it does not answer on.
> > > > > =
> > > >
> > > > > I think I need something in the conf file but I don't know what.
> > > >
> > > >I don't think so; I'm fairly sure that the problem is that the
> > > >DHCP daemon "thinks" that the interface is *not* an Ethernet
> > > >interface; the ordinary interface for the "native" VLAN is
> > > >Ethernet but the interfaces for the VLANs that appear on the
> > > >wire with VLAN tags are not Ethernets. I suspect the problem
> > > >is either FreeBSD or perhaps generic *BSD specific.
> > > >
> > > >-- =
> > > >
> > > >         David Pick
> > > >
> > > >
> > > >-----------------------------------------------------------------------
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> > >
> > > Sean Murphy
> > > Network Technician
> > > California Institute of the Arts
> > > Voice           661.253.7732
> > > Fax             661.254-4561
> > >                  smurphy@xxxxxxxxxxx
> > >
> > >
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>Sean Murphy
>Network Technician
>California Institute of the Arts
>Voice           661.253.7732
>Fax             661.254-4561
>                  smurphy@xxxxxxxxxxx
>
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Sean Murphy
Network Technician
California Institute of the Arts
Voice           661.253.7732
Fax             661.254-4561
                 smurphy@xxxxxxxxxxx 


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