network will not connect directly through the modem

Inxsible · 2010-12-04 11:10:06

I have a weird issue in which one of my computers will not get assigned an IP address, if I connect it directly to the cable modem. However, if I use a router between the modem and the computer, everything works well.This happens only on one of my machines. My other laptop connects both ways. I am talking about the ethernet connection on both machines. No wireless or anything. The only difference between the machines is that the one that does not work uses netcfg and the one that works uses regular "network"

I just can't seem to understand why it will not be assigned an IP address even when I keep restarting net-profiles or even after a reboot.

Can someone direct me to the right path?

fu9ar · 2010-12-04 12:22:17

I would just try: (assuming you haven't already)

First su or sudo to root

ifconfig eth0 up
dhcpcd
ifconfig

Last edited by fu9ar (2010-12-04 12:22:42)

tpolich · 2010-12-04 16:38:03

if that doesn't work have you reset your cable modem? If you were using a different computer with it before they often save MAC address and will not issue an IP address to a different MAC address. Just hold the reset button in the back for a good 30 sec and it should work after it resyncs.

Inxsible · 2010-12-04 21:29:11

yup ...tried resetting the modem by pulling the plug on it for over 5 mins as well. and trying ifconfig eth0 up doesn't change anything either

Like I said, this is an issue with only one of the machines.

fu9ar · 2010-12-04 22:12:25

When you run

ifconfig eth0

What's the output?

Inxsible · 2010-12-04 22:27:53

eth0      Link encap:Ethernet  HWaddr 5C:AF:04:82:2D:3A  
          inet6 addr: fe80::5eaf:4ff:fe82:2d3a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12126 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7487 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11150781 (10.6 Mb)  TX bytes:1005897 (982.3 Kb)
          Interrupt:21 Memory:febe0000-fec00000

Arch Linux

#1 2010-12-04 11:10:06

network will not connect directly through the modem

#2 2010-12-04 12:22:17

Re: network will not connect directly through the modem

#3 2010-12-04 16:38:03

Re: network will not connect directly through the modem

#4 2010-12-04 21:29:11

Re: network will not connect directly through the modem

#5 2010-12-04 22:12:25

Re: network will not connect directly through the modem

#6 2010-12-04 22:27:53

Re: network will not connect directly through the modem

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