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RE: Advanced checking for listen

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: Advanced checking for listen
From: "Chris" <Chris@xxxxxxxxxxxxxx>
Date: Thu, 21 Aug 2003 14:28:31 +0100
Joe,

I have resolved the issue with the routing and now everything is working fine. 
I am just thinking 
in future, if there are any problems with routing in a cluster using lvs/tun, 
the director would 
not isolate the affected server. This would result in a percentage of all new 
requests being ignored.
It think lvs/nat would not be affected but the same problem could occur with 
lvs/dr. 

Chris


-----Original Message-----
From: Joseph Mack [mailto:mack.joseph@xxxxxxx]
Sent: 21 August 2003 13:25
To: LinuxVirtualServer.org users mailing list.
Subject: Re: Advanced checking for listen


Chris wrote:
> 
> Hello,
> 
> I am running a simple configuration of 1 director and 3 real servers running 
> Windows 2000. 
> Requests are forwarded to the real servers using lvs/tun (ip tunnelling).

can you turn line wrap on? your paragraphs are all one line and run off the end 
of the page.

> Everything is working well but the other day I encountered a problem where 
> routing 
> and remote access was not running on one of the servers. As far as the 
> director is 
> concerned, the server is working correctly as it responds and returns the 
> correct debug 
> page. However, if a request was sent to that server, the response would not 
> be routed to the client.

You first need to find out where the routing is blocked. Run tcpdump on the 
director, the realserver
(if you don't have tcpdump for windows, do it on the machine which is the 
realserver's default gw).

Joe

-- 
Joseph Mack PhD, High Performance Computing & Scientific Visualization
SAIC, 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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