Since you touched the Linux box it would be the first suspect.
Can you verify that there was no configuration change? - even by accident?
If there was a change, can you roll it back to original?
Are there other computers or printers connected to the hub?
Is the hub single speed or dual speed? (10/100)
(Thinking about speed/duplex mismatches.)
How does the Linux box configure the default route? Does it point to its own
E0 interface or to the remote GW? (Thinking about filling its ARP cache)
> -----Original Message-----
> From: Paul Borghese [mailto:[EMAIL PROTECTED]]
> Sent: Saturday, June 02, 2001 7:42 PM
> To: [EMAIL PROTECTED]
> Subject: Problem with home network [7:6922]
>
>
> I have a cable modem connected to a linux box that is
> performing NAT from my
> invalid home network of 172.16.1.0/24 to my valid IP address
> 209.160.20.67.
> The 172.16.1.0 network is going into a small inexpensive hub.
> This setup
> has worked for about a year.
>
> A few days ago, I needed to do some things on the linux box.
> When I hooked
> everything back up my internet access was horrid. Found the
> following:
>
> If I ping from 172.16.1.98 (my PC) to the following addresses:
>
> 172.16.1.1 (PC's Default GW, E1 interface on Linux box)
> 0% Packet Loss
> 209.160.20.67 (E0 Linux IP address and address PC is being
> NATed to) 0%
> Packet loss
> 209.160.20.1 (GW of Linux Box)
> 70% Packet Loss
>
> If I ping from the Linux box I see no packet loss to 172.16.1.98 or
> 209.160.20.1. So I can now deduce the connection between the
> Linux box and
> the default GW is clean.
>
> But something is occuring with the NAT translations that
> causes 70% packet
> loss through the box.
>
>
> Ok, so here is the puzzling thing. If I remove the hub and
> use a crossover
> cable between the PC and Linux box the address which is problamatic
> 209.168.20.1 receives no packet loss when pinging from the PC
> - hence fixing
> the problem.
>
> So in other words, removing the hub on the 172.16.1.0 network
> fixes the
> connection at 209.168.20.1 ?!?
>
> Any ideas?
>
>
> Paul Borghese
> Report misconduct
> and Nondisclosure violations to [EMAIL PROTECTED]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=6924&t=6922
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