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RE : RE : Duplicate ARP table entries
- From: "Arnaud Chataignier" <achataignier at neotion dot com>
- To: "'Gary Thomas'" <gary at mlbassoc dot com>
- Cc: "'Jeff Duncan'" <Jeffd at Magtek dot com>,<ecos-discuss at sources dot redhat dot com>
- Date: Wed, 10 Nov 2004 08:47:36 +0100
- Subject: [ECOS] RE : [ECOS] RE : [ECOS] Duplicate ARP table entries
No Gary, I'm sure I'm using the same MAC address for both Redboot and
the application. If it comes from a configuration mistake, it isn't this
one at least.
-----Message d'origine-----
De : ecos-discuss-owner@ecos.sourceware.org
[mailto:ecos-discuss-owner@ecos.sourceware.org] De la part de Gary
Thomas
Envoyé : mardi 9 novembre 2004 20:09
À : Arnaud Chataignier
Cc : 'Jeff Duncan'; ecos-discuss@sources.redhat.com
Objet : Re: [ECOS] RE : [ECOS] Duplicate ARP table entries
On Tue, 2004-11-09 at 10:14, Arnaud Chataignier wrote:
> I confirm the bug. I see it also frequently, but unfortunately I
> hadn't had time to dig into the problem yet.
>
> What I do as a temporary patch for the moment is to set the ARP entry
> manually on host side, so that it doesn't generate an ARP request. May
> be it can help you for a while...
>
> But for sure this bug needs to be fixed for a use in a real product. I
> woudl appreciate receiving the patch if you find the solution before I
> do.
This can happen if your eCos application uses a different ESA (ethernet
hardware address) than what RedBoot does. I have seen this - it happens
when the 'fconfig' data isn't set up quite correctly.
>
> Regards,
> Arnaud.
>
> -----Message d'origine-----
> De : ecos-discuss-owner@ecos.sourceware.org
> [mailto:ecos-discuss-owner@ecos.sourceware.org] De la part de Jeff
> Duncan Envoyé : mardi 9 novembre 2004 17:49
> À : ecos-discuss@sources.redhat.com
> Objet : [ECOS] Duplicate ARP table entries
>
>
> I'm looking for some insight into a problems I am seeing. Using the
> latest eCos with FreeBSD stack on an Arm9 connecting directly to a PC,
> I sometimes get into a situation where communication (such as ping)
> fails. Looking into it further I have found that there seem to be
> duplicate entries in the Arp table. The ethernet output resolves to
> one entry that has expired triggering an Arp send. When the Arp
> response is received, a different Arp table entry is updated with the
> new Arp timeout. So what I end up with is a ping request from the
> host, a response being generated from ICMP, and a new Arp request
> coming out of the device.
>
> Sometimes I can fix the problem by clearing the route table and
> initializing the connection again.
>
> Any ideas?
>
> Thanks,
> Jeff
>
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--
Gary Thomas <gary@mlbassoc.com>
MLB Associates
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