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Re: about ARP communication

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: about ARP communication
From: Joseph Mack NA3T <jmack@xxxxxxxx>
Date: Thu, 23 Mar 2006 21:09:53 -0800 (PST)
On Thu, 23 Mar 2006, Monty Ree wrote:

Hello,all.

I have set the LVS using DR and kernel patched at realserver.
and I have executed like below "tcpdump -e arp"
But I have some questions about arp. like below, what's the meaning of the 0:0:0:0:0:0 and 0:0:0:0:0:1?
Is this a virtual MAC?

regretably no-one seems to have a clue. You would appear to be the world-expert on the matter (this happens here more often that you might expect for a mailing list of LVS experts). If you find out more about what's going on in your area of expertise, could you let us know?

Thanks Joe


eth0 < 0:d0:b7:89:1b:68 0:0:0:0:0:1 ip 60: CLIENT.2002 > VIP.domain: F 32:32(0) ack 324 win 17197 (DF) eth0 > 0:0:0:0:0:0 0:d0:b7:88:eb:5c ip 54: VIP.domain > CLIENT.2002: F 324:324(0) ack 33 win 5840 (DF)

1. like above, what's the meaning of the 0:0:0:0:0:0 and 0:0:0:0:0:1?
Is this a virtual MAC?

2. above, 0:d0:b7:89:1b:68 is not a CLIENT or router mac but LVS Director's mac.
0:d0:b7:88:eb:5c is not a CLIENT or router mac but  RealServer's mac.

As I know, destination of the mac must be a gateway or router at the reply packet, right?
But like above, dst mac is realserver itself.
I can't understand..


Thanks in advance and sorry poor english.





3.

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Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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