90% packet loss to router?

OatBran · 11-15-2001, 09:50 AM

Okay, I gave up on dhcp and have my linux box getting an ip of 192.168.1.150 from the router. Whenever I ping the router (192.168.1.1) I lose about 90% of the packets. Same loss when I ping an ip outside my network (207.69.188.186).

I'm sure the wire works fine, I moved it directly from my working win98 machine to the linux box. My DNS isn't working right yet, but I'll worry about that later.

Can anyone give me anything to check before I assume it's a hardware problem with my 3com nic?

fenriswolf · 11-15-2001, 01:52 PM

what kernel version are you using? I switched from 2.2.19 to 2.4.12 or something like that and my 3com card started dropping packets like a mofo.....this was with both Debain and Slakware...so it seems to be distro inspecific......

maybe you have the same issue....

3com 905b

Teller_30 · 11-15-2001, 02:21 PM

Have you tried pinging localhost to see what happens? If you still get packet loss then you know it isn't your cabling, router, hub, etc...

My bet would be your network card is either gone bad or you have changed something in the kernel or modules that have wacked things out, but I would still take at look at cable ends for problems.

fenriswolf · 11-15-2001, 02:53 PM

The card is a possibility, but like I said, I changed to 2.4, didnt change any perameters...and the card slowed way down....when I revert to 2.2, it works fine........it may not be a hardware issue...try a diffferent driver or kernel....or try it in a different OS before you say the card is wasted.

OatBran · 11-16-2001, 01:53 PM

How do I know what kernel I'm using? It's just a normal install of RedHat 7.0 off of the CDs. I have no problem pinging the localhost.

I'll definitely throw the nic in one of my other machines before I scrap it though.

Teller_30 · 11-16-2001, 03:49 PM

uname -r from a console prompt will tell you what kernel you are using.

RH7.0 should have a 2.2.x kernel..

If you can ping your localhost just fine, then check your cable if that is fine and you are sure your hub/router is fine, then go ahead and try the NIC in a computer you know is working. Other than that you could recompile your kernel and make sure you have support for your NIC compiled in.

Ript · 11-16-2001, 05:56 PM

uname -r

jkendall · 11-19-2001, 02:54 AM

a BIG pita I have run into...
ltsa cable modems/routers/stuff
are set for half-duplex
(and some auto-negotiate the speed)
and croak if your network is the
wrong duplex....you are half, it is full or vice-versa.
Jim