Re: [lwip-users] Ping Error

[Gisle Vanem]

"Philippe VENAULT" <address@hidden> wrote:

> I have a local network with a PC, my equipment and a switch.
> IP Addr switch : 192.168.0.1
> IP Addr PC : 192.168.0.2
> IP Addr Equipment : 192.168.0.3
>
> Ping from PC to equipment
>
> first request : ARP => the PC searchs who is 192.168.0.3 ?
> Reply : ARP => Equipment replys 192.168.0.3 is at 00:0a:35...(MAC ADDR)
>
> Second request ICMP => Echo (Ping) Request from 192.168.0.2 to 192.168.0.3
> reply : ICMP => Echo (Ping) Reply from 128.232.0.3 to 192.168.0.2

Let me see if I understood the problem. You're pinging from 192.168.0.2 to
192.168.0.3 and get a reply from 128.232.0.3? You conclude that from a
Wireshark trace? What's the MAC-src of the reply from 128.232.0.3? If it's
the MAC-src of the switch it cannot be from 128.232.0.3 since that's on 
another LAN-segment. Right? Assuming your netmasks are correct.

So either you're misreading the trace incorrectly or a legit ICMP-echo-reply 
from 128.232.0.3 just confused you, or an endian issue, or something else.

Did you use a display-filter (on MAC-address) in WireShark?

--gv