Re: [lwip-users] UDP packets with incorrect MAC addresses.

[christiaan . simons]

address@hidden wrote on 15-11-2004
17:02:25:

> We have received reports that, in some cases, our device (using
> lwip) sends UDP packets to a gateway with incorrect MAC address (all
> FF).

All FFs souds like the ehternet broadcast address.
Are they really sure the target is a unicast address?
(maybe they mistake a subnet broadcast for a unicast?)

> Also, no ARPs are sent by our device. We cannot reproduce the
> problem here. The network in question has Cisco routers in a dual
> router configuration.

The ARP won't pass an IP router. Nothing to worry about.
Recently I did encounter another ARP problem in an old
lwip version we've used. It produced an ARP network flood.

> Any ideas? We are currently using an old version of lwip (I believe
> 0.6.1). Will updating fix this problem?

I can highly recommend an update.
Many serious issues were solved since 0.6.1.

See also the changelog file.

Bye,

Christiaan Simons

Software Engineer
Axon Digital Design

+31 (0)13 511 66 66
+31 (0)13 511 41 51

address@hidden
http://www.axon.tv

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