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Re: LVS DR trouble reaching back the client

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: LVS DR trouble reaching back the client
From: Joseph Mack <mack.joseph@xxxxxxx>
Date: Wed, 16 Feb 2005 10:38:38 -0500
Harsha wrote:
> 
> Hi all
> 
> thanx in advance for helping(urgent help needed)

there's an entry for people who need urgent help here

http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.introduction.html#getting_technical_help

thanks for the complete description of your setup.

> Real server 1
> 
> eth0 192.168.1.145 (Real server on which the web server is running)
> eth1 192.168.3.145 (for the response to reach the client)
> 
> lo:0 192.168.3.146

let's do this one step at a time: remove eth1 and have both the 192.168.1.x and
192.168.3.x network all using the same set of wires.

then run the setup in the mini-HOWTO.
When that works return to this setup.

> IP forwarding is not needed on the Linux Director ???.

it's been a while but I think not, but it doesn't hurt.

> when a Request is sent from the client to the VIP.
> The error "Page cannot be displayed " is encountered

use the telnet client, it's simpler for debugging

client# telnet VIP 80
GET /

> we have PROBABLY hidded the lo:0 interfaces on both the real servers
> 
> we have actually created the config files for lo:0
> and then used the commands
> 
> echo "1" > /proc/sys/net/ipv4/conf/all/hidden
> echo "1" > /proc/sys/net/ipv4/conf/lo/hidden
> 
> which should have solved the problem.
> but we are not sure whether the arp patch is set up or not

if you didn't patch it yourself, probably not.
 
> Does the kernal i have is already patched with the noarp patch ????

noarp is a module, you don't need to patch the kernel
 
Joe

-- 
Joseph Mack PhD, High Performance Computing & Scientific Visualization
LMIT, Supporting the EPA Research Triangle Park, NC 919-541-0007
Federal Contact - John B. Smith 919-541-1087 - smith.johnb@xxxxxxx

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