Message in log Monowall.

From:	"RoboK" <mono at centrum dot sk>
To:	<m0n0wall at lists dot m0n0 dot ch>
Subject:	Message in log Monowall.
Date:	Tue, 12 Dec 2006 09:01:02 +0100

Hi, 
can anybody help me, what does mean this message in the log of the monowall:
"/kernel: arp: 192.168.2.2 moved from 00:06:4f:0b:ed:3e to 00:30:05:21:4e:89 on xl0"
Thanks.
RoboK.