anyone who saw this arp traffic?

["Monty Ree" <chulmin2 () hotmail com>]

Hello, all.

When I capture network traffic at server farm,I can see lots of arp 
broadcast like below.
But there is no server which use 172.16.x.x ip address.
and curiously, 

1. source ip and destination ip is same 
2. more curiously, same traffic(source mac:0:10:dc:f1:f7:64 , source 
ip:172.16.97.157) is seen at my office. 
3. I can also see this traffic(source mac:0:10:dc:f1:f7:64 , source 
ip:172.16.97.157 ) at other IDC.

Have you ever seen this traffic?

Thanks in advance.


10:15:26.759069 0:10:dc:f1:f7:64 Broadcast arp 60: arp who-has 
172.16.97.157 (Broadcast) tell 172.16.97.157
10:15:26.803792 0:c:76:4e:4:c8 Broadcast arp 60: arp who-has 172.16.100.103 
(Broadcast) tell 172.16.100.103
10:15:26.955878 0:c:76:4e:4:c8 Broadcast arp 60: arp who-has 172.16.100.103 
(Broadcast) tell 172.16.100.103
10:15:26.967737 0:10:dc:f1:f7:64 Broadcast arp 60: arp who-has 
172.16.97.157 (Broadcast) tell 172.16.97.157

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