Re: [lvs-users] Strange behavior of ipvsadm

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] Strange behavior of ipvsadm
From: "Grasmo, Johan" <johan@xxxxxxxxxxxxxxxxx>
Date: Fri, 30 Nov 2007 10:31:27 +0100
Hi again,

I've done some debugging and I still can't see that I've got any issues
with ARP. A tcpdump (tcpdump -i eth1 dst -vvv) on the
director when ipvsadm is "working" shows that the ARP-address is correct
(the director's mac-address).

When the lvs fails the tcpdump returns nothing. This happens after
around 10 minutes and I can't see why this is an ARP problem.

Please let me know if you want me to send more detailed information
about my setup.


> -----Original Message-----
> From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx [mailto:lvs-users-
> bounces@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Graeme Fowler
> Sent: 29. november 2007 14:45
> To: users mailing list.
> Subject: Re: [lvs-users] Strange behavior of ipvsadm
> On Thu, 2007-11-29 at 12:29 +0100, Grasmo, Johan wrote:
> > I'm using TUN and I've checked the "arp"-problem and everything
> > ok.
> If I were you, I'd run the system up, get it to the point where the
> director is reporting zero connections and then run tcpdump on the
> director's "external" interface (ie. that with the VIP).
> If you're seeing requests come in to the director from the clients,
> something is clearly wrong - but my money is on the requests somehow
> bypassing the director and going straight to one of the realservers.
> Let us know what you find.
> Graeme
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