[ltp] Problem connecting to ISP with TP600

[Robert Hajime Lanning]

An MTU of 8 is invalid.   MTU = Maximum Transmit Unit
An MTU of 8 is smaller than the IP header itself.

---- As written by Tod Harter:
> 
> 
> > >
> > > 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:13493 errors:0 dropped:0 overruns:0 frame:0
> > >           TX packets:13493 errors:0 dropped:0 overruns:0 carrier:0
> > >           collisions:0 txqueuelen:0
> > >           RX bytes:10459494 (9.9 Mb)  TX bytes:10459494 (9.9 Mb)
> >
> > I get about the same thing, except for the packets size which is only
> > 8
> 
> Well, your RX and TX packet counts and bytes will of course vary. The 'MTU' 
> value should probably not be different though, thats the size of the 
> "packets" that the interface supports. Since lo is a complete software 
> artifact the value is 16k bytes probably just for maximum efficiency. If you 
> have an MTU of 8 though I would think that highly unusual and indicative of a 
> problem somewhere.
> 
> >
> > > and you should also have an entry like
> > >
> > > 127.0.0.1               localhost.localdomain   localhost
> > >
> > > in /etc/hosts
> >
> > Yes, I did have that line.
> >
> > But, now, I am stuck more than ever, since I can no longer boot my
> > system. While booting, after the line :
> >
> > "bringing up interface lo:   OK
> >
> > it gets stuck on the next line, which says :
> >
> > "bringing up interface ppp3"
> >
> > I can't understand what it is about that new interface... I must have
> > done something wrong in the numerous trials that I have carried
> > tonight. I is now too late to go any further ; hopefully I will manage
> > to watch it to morrow.
> >
> ppp3 eh? hmmm. ppp can get used for a variety of purposes. Usually dial-up, 
> but some DSL setups also require ppp (and there are many other more arcane 
> uses for it). I suppose you could have stumbled into a config dialog in 
> whatever program you are using to config your machine and turned something on.
> 
> As a rough guide to how networking is set up on Linux boxes (at least in the 
> Red-hattish part of the Linux world), there is a script /etc/init.d/network 
> that is the master network startup script. That generally brings up your lo 
> interface and any other interfaces, like eth0 that can be initialized at 
> startup. The configuration of your network interfaces is garnered from the 
> /etc/sysconfig/network-scripts directory. Each interface has a script there, 
> which simply sets some environment variables like the IP number, interface 
> name, etc. /etc/init.d/network just calls 'ifup $DEVICE' for each one that is 
> marked with 'ONBOOT=yes' at startup. You can call ifup and ifdown yourself 
> with an interface name to accomplish the same thing. So you can no doubt get 
> rid of the rogue 'ppp3' by deleting 
> /etc/sysconfig/network-scripts/ifcfg-ppp3. However generally ppp interfaces 
> get started by /etc/sysconfig/network-scripts/ifup-ppp which works 
> differently. It is in fact way complicated... I don't even pretend to fully 
> understand it.
> 
> As for PPP configuration... 
> 
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> 


-- 
/* Robert Hajime Lanning                             lanning@lanning.cc
** Trade: Unix Systems Administrator (Senior level) (SAGE IV)
*/
#include <std_disclaimer.h>

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