From owner-freebsd-net  Fri Jun  1  7: 8:40 2001
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Date: Fri, 1 Jun 2001 10:07:37 -0400 (EDT)
From: Bernie Doehner <bdoehner@cabletron.com>
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Reply-To: <bad@uhf.wireless.net>
To: Jean-Christophe Varaillon <jcv@vbc.net>
Cc: <freebsd-net@freebsd.org>
Subject: Re: Expire value 
In-Reply-To: <Pine.BSF.4.10.10106011454070.9645-100000@brunel.uk1.vbc.net>
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Unless you have an usual setup, I think the reason the entry is aging
out of your arp table (not routing table) is that either one of the machines
or your hub or your cabling have an intermittent connection.

Whenever an entry ages out of your arp table, and if the machines decide to
talk again thereafter, an ARP request will be issued to resolve the MAC address
which will subsequently be cached in your ARP table and aged out over time.

The ARPs apparently aren't making it across..  Something to check, is are
both machines using the listening to the same broadcast address? Are you running
some kind of broadcast suppression on your LAN, any kind of firewall filtering?

Bernie


On Fri, 1 Jun 2001, Jean-Christophe Varaillon wrote:

> Date: Fri, 1 Jun 2001 14:56:35 +0100 (BST)
> From: Jean-Christophe Varaillon <jcv@vbc.net>
> To: Bernie Doehner <bdoehner@cabletron.com>
> Cc: freebsd-net@FreeBSD.ORG
> Subject: Re: Expire value
>
> On Fri, 1 Jun 2001, Bernie Doehner wrote:
>
> > How about the entry aging out due to no more traffic to/from this
> > MAC address?
> >
>
> The thing is that I am loosing connectivity between 2 machines on a same
> LAN !
>
> I suppose that traffic or not, the MAC address of machines in a same LAN
> should appears in their routing table, no ?
>
>
>
> > >
> > > Hi,
> > >
> > > By doing a netstat -nr I can see that:
> > > ----
> > > Destination        Gateway      Flags      Netif Expire
> > >
> > > x.x.x.x      0:50:73:28:70:40   UHLW       fxp0    914
> > > ----
> > >
> > > I  my case when the Expire value reach 0, it does not restart as it
> > > should.
> > >
> > > I would like to know what could stop the timer to restart?
> > >
> > >
> > > Thanks,
> > > Christophe.
> > >
> > >
> > > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > > with "unsubscribe freebsd-net" in the body of the message
> > >
> >
> >
> > To Unsubscribe: send mail to majordomo@FreeBSD.org
> > with "unsubscribe freebsd-net" in the body of the message
> >
>
>
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