[ECOS] RE : [ECOS] RE : [ECOS] Duplicate ARP table entries

["Arnaud Chataignier" <achataignier at neotion dot com>]

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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