eth0 Networking Problem

[Linuturk]

Well, I was quite mistaken in my last diagnosis. It seems the issue was a little deeper than I thought.

I have removed several packages:

sudo aptitude purge libnss-mdns avahi-autoipd avahi-daemon avahi-utils telepathy-salut

and that has sped up my boot time and networking changes significantly. This has allowed me to properly diagnose the problem.

It seems that if I don't periodically ping my firewall (192.168.1.1) I can't get any information past that device. My default gateway (192.168.1.2) is a switching router with this ip route defined:

ip route 0.0.0.0 0.0.0.0 192.168.1.1

Please note:
There are about a hundred other workstations on this same network that work fine using 192.168.1.2 as the default route.
This was a non-issue using Fedora 13 last week.

Why is my connectivity dropping unless I ping my firewall at 192.168.1.1?

I have a temporary solution in place of running:

ping -i 30 192.168.1.1

but this is not ideal.

[Linuturk]

$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     1      0        0 eth0
10.3.1.0        *               255.255.255.0   U     2      0        0 wlan0
default         192.168.1.2     0.0.0.0         UG    0      0        0 eth0

[Sergius14]

You should run further or deeper diagnosis.

Run a Wireshark to see what is happening when you lost conectivity.

I'll speceally check ARP requests/responses.

Can be the OS with something wrong, but first you need to figure out the exact cause.


Install Wireshark, wait to "loose" conectivity and check what's happening. Then update your post.

[Linuturk]

I'm not noticing anything obvious, except for the expected TCP retransmission requests.

[Linuturk]

I am ashamed to say that there was a duplicate IP on the network. I should have checked for it.

[Sergius14]

Glad to know that you can find and solved your issue.