Re: DSL dies - eth1 dies?

["Harry Butler" <butler usq edu au>]

cweiss stickyc com said:
> I'm using Red Hat 6.1 to do IP routing using IPchains. One eth1 is
> plugged into an Alcatel DSL modem and eth0 goes to a hub that serves 6
> or so Winboxes. If I temporarily lose the DSL connection (for
> isntance, by power cycling the modem or by some mysterious upstream
> error), the connection is never restored from linux. I'm unable to
> ping the gateway that's upstream.

> eth0 is a Netgear 100base-T card. eth1 is an Intel 10/100.

> I can ping the other machines connected to eth0 and I can ping eth1
> itself. Pinging the gateway via ip (or any other sites) upstream of
> eth1 results in a "destination host unreachable" error. Bringing down
> eth1 and bringing it back up again (ifconfig eth1 down)does not
> re-establish the connection. Soft-rebooting (ctrl-alt-delete) does not
> restore the connection. I'm forced to power cycle the machine and the
> modem to restore the connection. The PC is an Abit motherboard with
> first a Pentium 200mmx, then with an AMD 233. 

This sounds like the problem me and a friend are having over ppp. The 
connection establishes for awhile and than locks the connection. We can ping 
and nslookup the host at the other end of the network. However we can't 
telnet, netscape etc. If I kill and restart pppd everything is fine again.  I 
haven't tried ping my home box to see if that works when it freezes as I can't 
get out to do it... However we are setting up another box at work that I 
should be able to try this on.

I was wondering whether it could be a network service that is causing the 
problem. What network services do  you have running. I have the following:

ftp 
telnet
shell
login
talk 
ntalk
finger
auth
nfs
qmail
routed
netfs
sshd
lpd
linuxconf

It might be some conflict between two of these that is causing the problem.


Cheers
Harry








-- 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Harry James Butler, 
smail:Dept of Mathematics and Computing,
Faculty of Sciences, USQ, Toowoomba, Qld, 4350 
email: butler usq edu au
Phone: +61 7 4631 1857 Fax: +61 7 4631 1775 Room: L408  
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A woman was in love with fourteen soldiers.  It was clearly platoonic.