Multicast setup

[Cody Holland]

So this config should work properly as long as the ip helper-address or
dhcp relay address is forwarding the requests appropriatly and using the
ip helper-address as the address it is requesting from?

Cody Holland
Network Analyst
Redmoon Inc.
972-599-3926
cholland at redmoonbroadband.com
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> -----Original Message-----
> From: dhcp-users-bounce at isc.org 
> [mailto:dhcp-users-bounce at isc.org] On Behalf Of Chuck Anderson
> Sent: Friday, November 03, 2006 10:39 AM
> To: dhcp-users at isc.org
> Subject: Re: Multicast setup
> 
> On Fri, Nov 03, 2006 at 09:29:54AM -0600, Cody Holland wrote:
> > assigned to the local dhcp server network card. For some reason the 
> > dhcp server is trying to assign IP's out of the subnet for 
> the local 
> > interface and getting errors that there are no free leases. The 
> > following is the dhcp config that I am currently using, any help on 
> > this would greatly be appreciated.
> 
> The server matches subnets based on the giaddr value in the 
> incoming DISCOVER packets.  If the giaddr is 0.0.0.0, then 
> the server will assign an IP out of the local interface subnet.
> 
> > # Server IP Network
> > subnet 172.17.101.0 netmask 255.255.255.224 {
> >         option routers 172.17.101.1;
> >         authoritative;
> >         # DHCP Server
> >         host DHCPServer {
> >                 hardware ethernet 00:30:48:78:5b:c8;
> >                 fixed-address 172.17.101.5;
> >                 }
> >         }
> 
> host { } statements are always global semantically, even if 
> they are put into other scopes syntactically.  To avoid 
> confusion, it would be best to put all host { } statements 
> outside of all other subnets, pools, etc.
> 
> > # Mesh INF
> > subnet 172.16.0.0 netmask 255.255.252.0 {
> 
> I would run tcpdump or ethereal (wireshark now) to check the 
> incoming packets to be sure the "ip helper" is acting as a 
> proper DHCP Relay Agent and is setting giaddr correctly to 
> the router's subnet interfaces on the client networks.
> 
>