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Re: arp cache issue

To: "Snyder, Ryan" <RSnyder@xxxxxxxxxxxxx>
Subject: Re: arp cache issue
From: Andi Kleen <ak@xxxxxx>
Date: Wed, 13 Jun 2001 03:40:22 +0200
Cc: "'netdev@xxxxxxxxxxx'" <netdev@xxxxxxxxxxx>
In-reply-to: <AA786FC0001CD51193D600600841E6600B0895@admin.nmt.edu>; from RSnyder@admin.nmt.edu on Tue, Jun 05, 2001 at 09:00:48PM +0200
References: <AA786FC0001CD51193D600600841E6600B0895@admin.nmt.edu>
Sender: owner-netdev@xxxxxxxxxxx
On Tue, Jun 05, 2001 at 09:00:48PM +0200, Snyder, Ryan wrote:
> Hello,
>   I was wondering if any one can help me, I received this email address from
> Alan Cox.
> 
>   I am running CheckPoint Firewall under Linux 2.2.19.  The Firewall is
> working fine,
> but on the interface that is connected to the Internet via a Cisco router
> has over 950
> entries in the arp cache.  I understand this is normal, but since there is
> only one
> route to the Internet, is there a way to not have Linux to an arp cache
> lookup, or even
> a setting to make the cache size much bigger?
> 
>   I have looked into running arpd, but I am kinda fuzzy about running daemon
> stuff in
> userspace; espically on a firewall.
> 
> Any help is greatly appreciated.

You can tune the ARP cache size using the appropiate sysctls. See
arp(7) for more information.


-Andi

-- 
Life would be so much easier if we could just look at the source code.

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