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Re: ifup and arp problem [ was RE: Help debugging director problems afte

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: ifup and arp problem [ was RE: Help debugging director problems after a period of time]
From: Horms <horms@xxxxxxxxxxxx>
Date: Wed, 7 Apr 2004 17:12:45 +0900
On Wed, Apr 07, 2004 at 09:59:15AM +0200, Francois JEANMOUGIN wrote:
> 
> 
> Horms :
> > Sent: Wednesday, April 07, 2004 3:26 AM
> > Other than spurious replication of the default route, that looks pretty
> > normal, but doesn't really tell us much.  Have you tried using ping or
> > traceroute to see if you can route ICMP to (and from) other machines,
> > like for instance the name server?
> 
> I just tried to follow this discussion, and because no one really seems to 
> find the problem, I would add my own experience :
> 
> Nether use ifup to mount noarping interfaces! In the ifup script, you will 
> find an arping command (line 205 230 and 234 in my RHES). If this is the 
> first realserver you are configuring, this is not really a problem, but if 
> you try to add a realserver to an existing pool of servers, this will mess 
> all the LVS routing structure by sending arp announce.

Ahh, yes that would definately be a problem. 
It is possible to bring the interfaces up using ifconfig or ip
directly, rather than using ifup. Either that or some how
stop ifup from calling arping.

-- 
Horms
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