Date: Tue, 02 Jan 2001 09:47:00 -0700 From: Wes Peters <wes@softweyr.com> To: =?iso-8859-1?Q?F=E9lix=2DAntoine?= Paradis <reel@sympatico.ca> Cc: hackers@freebsd.org Subject: Re: ARP question. Message-ID: <3A520604.39F63679@softweyr.com> References: <5.0.2.1.0.20010102023010.00a101f0@pop6.sympatico.ca>
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Félix-Antoine Paradis wrote:
>
> Hi,
> When we do a "dmesg" on a 4.2-STABLE box, we get:
>
> arp: 200.42.126.18 moved from 00:e0:7d:7b:53:f0 to 00:c0:df:f4:ac:05 on ed0
This means exactly what is says: IP address 200.42.126.18 was originally
associated with ethernet MAC address ...:53:f0, but has moved to ...:ac:05.
>
> and, in ifconfig, it says:
>
> ed0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> inet 200.42.126.20 netmask 0xffffff00 broadcast 200.42.126.255
> inet6 fe80::2e0:7dff:fe7b:548a%ed0 prefixlen 64 scopeid 0x1
> ether 00:e0:7d:7b:54:8a
>
> ed0 is connected to a switch. we want to know what the "arp: " message
> means. on the linux box, we have:
>
> eth0 Link encap:Ethernet HWaddr 00:C0:DF:F4:AC:05
> inet addr:200.42.126.18 Bcast:200.42.126.23 Mask:255.255.255.248
Yes, this interface is now showing what ARP reported above.
> eth1 Link encap:Ethernet HWaddr 00:E0:7D:7B:53:F0
> inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
And this one is not.
> Both eth0 and eth1 are connected to that same switch.
Did the Linux box reboot when you got the ARP message? If so, the Linux
box has reversed the order of the ethernet interfaces. If not, the Linux
box is routing packets over the wrong interface, which can happen when you
have two networks mingled together like this. What kind of switch is this?
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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