AW: Problems with destination IP of DHCP Offer Packages

[Remzi AKYÜZ]

Hello,

Can you look at;
"Multiple interfaces match the same subnet"

whan can say "ifconfig -a "



 Martin Krellmann wrote:
> Hi.
>
> I am starting the server manually for debugging purposes:
> /usr/sbin/dhcpd -d -cf /etc/dhcpd.conf -lf /var/lib/dhcp/db/dhcpd.leases -tf
> /var/log/dhcpd.trace.log ipsec0
>
> It generate the following output:
>
> Internet Systems Consortium DHCP Server 4.1.0
> Copyright 2004-2008 Internet Systems Consortium.
> All rights reserved.
> For info, please visit http://www.isc.org/sw/dhcp/
> WARNING: Overwriting trace file "/var/log/dhcpd.trace.log"
>
> Wrote 0 class decls to leases file.
> Wrote 0 leases to leases file.
> Multiple interfaces match the same subnet: eth0 eth2
> Multiple interfaces match the same shared network: eth0 eth2
> Multiple interfaces match the same subnet: eth0 eth1
> Multiple interfaces match the same shared network: eth0 eth1
> Multiple interfaces match the same subnet: eth0 ipsec0
> Multiple interfaces match the same shared network: eth0 ipsec0
> Listening on LPF/ipsec0/00:0a:e6:26:28:f8/0.0.0.0/0
> Sending on   LPF/ipsec0/00:0a:e6:26:28:f8/0.0.0.0/0
> Sending on   Socket/fallback/fallback-net
> omapi_set_value (state, 1)
>  ==> invalid argument
>
> With tcpdump on ipsec0 I can see the incoming dhcp request and the outgoing
> offer to the destination ip that should be assigned.
>
> Greets,
> Martin.
>
> -----Ursprüngliche Nachricht-----
> Von: dhcp-users-bounces at lists.isc.org
> [mailto:dhcp-users-bounces at lists.isc.org] Im Auftrag von Glenn Satchell
> Gesendet: Samstag, 11. Juli 2009 19:27
> An: dhcp-users at lists.isc.org
> Betreff: Re: Problems with destination IP of DHCP Offer Packages
>
>
>   
>> Date: Sat, 11 Jul 2009 17:59:41 +0200
>> From: "Martin Krellmann" <martin2002 at web.de>
>>
>> Hi.
>>
>>  
>>
>> I am running dhcp server 4.1.0. It is listening directly on interface
>> "ipsec0" which is the interface of an ipsec tunnel. I need to send DHCP
>> offers out over this interface.
>>
>> I am not using an relay agent because openswan, relay agent and dhcp
>>     
> server
>   
>> are then running on the same host and I could not get the internal routing
>> from the relay agent to the server working.
>>
>>  
>>
>> Let's say remote clients should get an ip address out of the subnet
>> "10.0.1.0/24". The ipsec server adds an route to the destination
>> 255.255.255.255 on interface "ipsec0" so broadcast packages should be
>> transmitted over the tunnel. The problem is that the dhcp server does not
>> broadcast the offers but sends them to the IP that should be assigned to
>>     
> the
>   
>> client. So the package will never be routed over the ipsec tunnel and the
>> client gets no ip address.
>>
>> Is this a configuration problem or is this a default behavior?
>>
>>  
>>
>> Greets,
>>
>> Martin.
>>     
>
> when dhcpd start up it there a line indicating that it is listening on
> interface ipsec0? Something like one of these (this is on Solaris, but
> most of the line should be close to yours) :
>
> Listening on DLPI/hme0/08:00:20:b0:eb:e3/192.168.14.0/24
> Sending on   DLPI/hme0/08:00:20:b0:eb:e3/192.168.14.0/24
> Sending on   Socket/fallback/fallback-net
>
> regards,
> -glenn
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>
>
>
> _______________________________________________
> dhcp-users mailing list
> dhcp-users at lists.isc.org
> https://lists.isc.org/mailman/listinfo/dhcp-users
>   

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/dhcp-users/attachments/20090712/1c53378b/attachment.html>