Unsuccessful gateway. Too may arp coversations.

From: Sanal Kisi (sanalkisi_at_yahoo.com)
Date: 03/28/05 

Date: Mon, 28 Mar 2005 15:22:03 +0300

Hi,

I am having problems with my new RHAS3 Linux which I have setup as the
gateway for our LAN to internet.

When setting the system up I have used 5-10 local workstations to see
and configure the routing and NAT. Everything was working perfectly. I
also installed squid and saw the benefit of it too.

But now when I configure more 50-100 or above clients to use this
gateway, it works only during the first 10-30 minutes. then the system
stops acting as a gateway.

Both the public and private NIC's do respond to ping, but does not
forward traffic.

I have installed Ethereal on a local workstation and found out that
within 2 minutes, over 300,000 conversations are recorded, and of
99.35% of these are ARP broadcasts. There are over 15 machines each
owning 10,000-35,000 of these conversations.

Can this be the cause ? If yes, how can I fix it ?

Regards.

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