[Baylisa] DSR load balancer oddities with Ubuntu?

[Ray Wong]

Well, it sort of has to with DSR, right? :) the traffic hits the BigIP,
forwards to the server, and the server replies directly out the router. I'm
probably being thickheaded from a long week, do you mean some other sort of
pathing?


On Fri, May 10, 2013 at 12:08 PM, Ulf Zimmermann <ulf at alameda.net> wrote:

> Check if you are running into return path issue. I.e. traffic comes in one
> path tries to leave another.
>
> Ulf Zimmermann | OPENLANE, Inc.
> 2200 Bridge Parkway, Suite 202
> Redwood City, CA 94065, USA
> Tel +1-650-412-4042 | ulf at Openlane.com
>
>
> On May 10, 2013, at 11:57, Ray Wong <rayw at rayw.net> wrote:
>
> > Hey, I know the list has been quiet on tech discussions lately, but I'm
> > hoping someone can help as my google-fu is not strong on this, it seems.
> >
> > We've been trying to migrate some of our old Fedora Core machines to
> Ubuntu
> > (12.04LTS), and have run into an annoying difference in network behavior,
> > which I'm hoping someone else has encountered and figured out a fix.
> >
> > We split our CIDR allocation, and backhaul our office bandwidth through
> the
> > colo a couple blocks away. The load balanced network and the office are
> > routed and separate blocks/masks/vlans, but for some reason office
> traffic
> > can't seem to talk to Ubuntu servers using DSR behind an F5 BigIP. The FC
> > machines work fine, it's only Ubuntu that doesn't seem able to do this,
> and
> > it works from anywhere outside. I'm using the dummy interface for the
> VIPs
> > with the arp_ignore set to 1 and arp_announce set to 2, which seems to
> have
> > everything working except for this one strange issue.
> >
> > Anyone else doing this successfully?
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>