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[ts-7000] Re: Still having problems with dhcp on TS7400

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Subject: [ts-7000] Re: Still having problems with dhcp on TS7400
From: "Peter Santangeli" <>
Date: Thu, 24 Jan 2008 21:42:44 -0000
It is indeed a wifi box, but I have unplugged the wireless adapter. 

I can easily get the network adapter (Actually, both network adapters
- wired and wireless) up using static IP:

eth0      Link encap:Ethernet  HWaddr 00:D0:69:40:E8:E5              
          
          inet addr:10.72.0.211  Bcast:10.255.255.255  Mask:255.0.0.0
          
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1         
          
          RX packets:4750 errors:0 dropped:0 overruns:0 frame:0      
          
          TX packets:2087 errors:0 dropped:0 overruns:0 carrier:0    
          
          collisions:0 txqueuelen:1000                               
          
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)                     
          
          Interrupt:39                                               
          
                                                                     
          
lo        Link encap:Local Loopback                                  
          
          inet addr:127.0.0.1  Mask:255.0.0.0                        
          
          UP LOOPBACK RUNNING  MTU:16436  Metric:1                   
          
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0         
          
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0       
          
          collisions:0 txqueuelen:0                                  
          
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)           

But not for dhcp.

My current theory is that it is an ipv6 problem, so I am attempting to
disable ipv6 in the kernel.

Unfortunately, modprobe -a crashes! This isn't filling me with
confidence. Remember that this is essentially a fresh debian install
off a Technologic supplied SD card.

Pete

--- In  "charliem_1216" <> wrote:
>
> --- In  "Peter Santangeli" <peter@> wrote:
> >
> > 
> > Unfortunately, no joy. Here's the output I get when I run ifup
> > --verbose eth0
> > 
> > Configuring interface eth0=eth0 (inet)                               
> >           
> > run-parts --verbose /etc/network/if-pre-up.d                         
> >           
> > run-parts: executing /etc/network/if-pre-up.d/bridge                 
> >           
> > run-parts: executing /etc/network/if-pre-up.d/wireless-tools         
> >           
> > run-parts: executing /etc/network/if-pre-up.d/wpasupplicant          
> >           
> 
> Hi Peter -
> 
> Is this a wireless interface you are trying to bring up?  I see other
> posts you refer to a wifi box, and wireless stuff is running above.
> 
> What does /sbin/ifconfig say?
> 
> Do you have backup ifcfg-eth0 files?  I found out the hard way that
> they are parsed _after_ the one you modified.  (ie, ifcfg-eth0 is
> parsed, then ifcfg-eth0.bak is parsed, undoing your changes)  I seem
> to have more hard-to-find config problems with debian, but then I'm
> used to Fedora.
> 
> (You've shown dhcp not working, but not really given the details that
> will help people help you troubleshoot).
> 
> Last resort I guess would be logging the exchange between dhcp client
> & server, using wireshark.
> 
> regards, ....... Charlie
>                                                            
> >           
> > dhclient3 -pf /var/run/dhclient.eth0.pid -lf
> > /var/run/dhclient.eth0.leases eth0 
> > Internet Systems Consortium DHCP Client V3.0.4                       
> >           
> > Copyright 2004-2006 Internet Systems Consortium.                     
> >           
> > All rights reserved.                                                 
> >           
> > For info, please visit http://www.isc.org/sw/dhcp/                   
> >           
> >                                                                      
> >           
> > Listening on LPF/eth0/00:d0:69:40:e8:e5                              
> >           
> > Sending on   LPF/eth0/00:d0:69:40:e8:e5                              
> >           
> > Sending on   Socket/fallback                                         
> >           
> > receive_packet failed on eth0: Network is down                       
> >           
> > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 5           
> >           
> > send_packet: Message too long   
> > 
> > 
> > --- In  "charliem_1216" <charliem_1216@>
wrote:
> > >
> > > --- In  "Peter Santangeli" <peter@> 
> > > wrote:
> > > >
> > > > I asked this a few months ago, and never really got a response. 
> > > I'm
> > > > having a heck of a time getting dhcp running on a ts7400. I'm 
> > > running
> > > > from the SD card, and pump seems to be failing with:
> > > > 
> > > > DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
> > > > send_packet: Message too long
> > > > 
> > > > I've tried using pump, dhcpcd, dhcp3-client, all fail the same 
> > > way,
> > > > like it is a driver problem.
> > > > 
> > > > Does anyone have dhcp running on a ts board running debian?
> > > > 
> > > > Pete
> > > >
> > > 
> > > Hi Pete --
> > > 
> > > This is usually because your MTU is set too low.  What 
> > > does 'ifconfig eth0' say?  MTU=64 is a common but bad value, and 
> > > gives the 'Message too long' message.  Try 'ifconfig eth0 MTU 1400'.
> > > 
> > > Set your dhcp client config to ignore the MTU returned by the 
> > > (presumably crappy) dhcp server.  (ie for dhcp3-client, remove 
> > > the 'interface-mtu' from /etc/dhcp3/dhclient.conf).  
> > > 
> > > Or if you can control the MTU value the dhcp server hands out, set 
> > > it to something reasonable.
> > > 
> > > Regards, ....... Charlie
> > >
> >
>




 
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