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Old 08-27-2010, 08:19 AM   #1
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Registered: Dec 2008
Posts: 27

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use tcpdump command .

[root@ad ~]# tcpdump -c 20 'ether dst ff:ff:ff:ff:ff:ff' -vv
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
21:10:59.798644 arp who-has (Broadcast) tell
21:11:01.874895 arp who-has (Broadcast) tell

my network setting.
[root@ad ~]# ip addr list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 100
link/ether 00:0c:f1:a7:40:fb brd ff:ff:ff:ff:ff:ff
inet brd scope global eth1
inet6 fe80::20c:f1ff:fea7:40fb/64 scope link
valid_lft forever preferred_lft forever
3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:f1:a7:40:fc brd ff:ff:ff:ff:ff:ff
inet brd scope global eth0
inet brd scope global eth0:1
inet6 fe80::20c:f1ff:fea7:40fc/64 scope link
valid_lft forever preferred_lft forever
4: sit0: <NOARP> mtu 1480 qdisc noop
link/sit brd
what has found itself ?


Last edited by pswen; 08-28-2010 at 10:31 PM.
Old 08-27-2010, 08:32 AM   #2
Registered: Nov 2005
Distribution: Fedora, Redhat
Posts: 372

Rep: Reputation: 101Reputation: 101
I'm not certain what your question is. I'm assuming is not the IP address of the system you are running the tcpdump on and you are questioning why is asking everyone in earshot to respond if they have that IP address.

This is something that Microsoft, not normally known for innovation, actually implemented a long time ago. That system is probably just initializing its IP stack and is looking to see if someone is already using the IP address it would like to use.

Linux now does that too, I believe.

If that's not your question then this is not your answer, so restate. Thanks.

Last edited by tommylovell; 08-27-2010 at 08:35 AM.


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