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Re: LVS-DR, arp problem...

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: LVS-DR, arp problem...
From: Joseph Mack <mack.joseph@xxxxxxx>
Date: Mon, 19 Nov 2001 13:12:15 -0500
Christian Joelly wrote:
> 
> Hello!
> 
> now i have drawn my setup for easier understanding, i hope someone can
> view "png" on his system :o)

how did you do the image? I'm looking for some way to do the same thing.

> director: kernel 2.4.10 with ip_vs-0.9.6 patch

> IP Virtual Server version 0.9.6 (size=4096)
> Prot LocalAddress:Port Scheduler Flags
>   -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
> TCP  edvlvs1.knapp.intern:www wlc
>   -> 192.168.100.2:www            Route   1      0          1

most likely packets are not getting back from the realservers to the client.

can you see packets for the VIP arriving on the realservers and none leaving
(with tcpdump)?

the 2 NIC realserver seems to be setup correctly. I haven't done it this way
for years, so I may have forgotten all the pitfalls. Maybe you could try it with
1 NIC on the realservers first.


> mac address on the VIP device. i have read the examples that comes with
> configure-lvs.pl, and there the client uses 2 NICs. in an real production
> environment, does the client have to be changed to an router connecting
> the 2 networks together?

no the arrangment I use is just so I can change easily between a 1-NIC and a 
2_NIC director.


> befor i make the first connection to the VIP?

yes. This also includes before the first arp request.

Joe

-- 
Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin
contractor to the National Environmental Supercomputer Center, 
mailto:mack.joseph@xxxxxxx ph# 919-541-0007, RTP, NC, USA


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