[SOLVED] Network unreachable: cannot ping router

[imranka]

problem:

Trying to ping router 192.168.1.1, saying network unreachable (or not reachable, forgot exact word).

doing

dmesg | grep eth | less

Returning at the last a line like: no ipv6 router present.

Doing

lspci -vv | grep -i eth

Returning the Intel ethernet card that I have.

Doing

/sbin/ifconfig -a

doesn't return any inet , bcast, mask addresses.

Now, first I thought the ethernet cable was not working, so I took my router and the cable and connected in other person's machine, but there the router page opened properly. Now, he told me, that the lancard may got fried. Another person told me to check the etherent port.

Now, I am very confused, how to troubleshoot this? Biggest problem is that, I don't have internet by my side to check immediately this forums or anything.

Any suggestion please....

[RobinVossen]

Request DHCP?
Or set IP by hand.
Also try mii-tool if you think the Eth-card /cable is broken

[imranka]

After many forum hopping I understood this can be because of configuration related issues also. So, I followed one solution, and checked my /etc/network/interfaces file and saw many garbage line was sitting there, cleaning the file and kept only

auto lo
iface lo inet loopback

solved the problem.

This is a new learning, a problem which seems like hardware issue is just a config problem.