How do you handle persistent connections?
Ken
----- Original Message -----
From: "Nimesh Vakharia" <nvakhariIZZAThotjobs.com>
To: <lb-lIZZATvegan.net>
Sent: Thursday, February 15, 2001 4:54 PM
Subject: Re: [load balancing] Cascading switches off of a Foundry switch
>
> Why don't you try impelmenting DSR(direct server return)? You will have to
> make some modifications on your web/mail servers (add loopbacks) but then
> you don't have to worry about the traffic flow. You should find some docs
> on foundry's website.
> We use it for smtp/www/ftp/https LB. Once setup you don't have to
> look at it.
>
> Nimesh.
>
> On Thu, 15 Feb 2001, tony
> bourke wrote:
>
> > Hi Gary,
> >
> > Not necessarly true... the only thing that needs to happen is that
> > L2 traffic flows through the load balancer at some point between the
> > Internet and the servers. This gives the load balancer the chance to
> > re-write the packets on the way in and on the way out.
> >
> > Source NATs aren't necessary if everything is on the same subnet.
> >
> > Tony
> >
> >
> > On Thu, 15 Feb 2001, Gary E. Miller wrote:
> >
> > > Yo Ryan!
> > >
> > > Unless the virt hosts are DIRECTLY connected to the ServerIron this is
not
> > > sufficient. You also need something like this:
> > >
> > > server source-ip [ip] [mask] [gw]
> > >
> > > server real ...
> > > source-nat
> > >
> > > RGDS
> > > GARY
> >
> --------------------------------------------------------------------------
-
> > > Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701
> > > gemIZZATrellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676
> > >
> > > On Thu, 15 Feb 2001, Ryan Tucker wrote:
> > >
> > > > Date: Thu, 15 Feb 2001 16:39:34 -0500
> > > > From: Ryan Tucker <rtuckerIZZATnetacc.net>
> > > > Reply-To: lb-lIZZATvegan.net
> > > > To: lb-lIZZATvegan.net
> > > > Subject: Re: [load balancing] Cascading switches off of a Foundry
switch
> > > >
> > > > We do have server real/server virts in there, but I clipped most of
them
> > > > out for security reasons. I just realized that the example I *did*
> > > > paste was from a few months ago, when I last tried to get this to
work,
> > > > and naturally it's incorrect ;-) The pattern is pretty much the
same.
> > > >
> > > > server real foo1 ip
> > > > port smtp
> > > > port pop3
> > > > port imap4
> > > >
> > > > server real foo2
> > > > port smtp
> > > > port pop3
> > > > port imap4
> > > >
> > > > server virtual foo
> > > > port smtp
> > > > port pop3 sticky
> > > > port imap4 sticky
> > > > bind smtp foo1 smtp foo2 smtp
> > > > bind pop3 foo1 pop3 foo2 pop3
> > > > bind imap4 foo1 imap4 foo2 imap4
> > > >
> > > > The one problem I run into with Foundry's documentation is
translating
> > > > what I want into what the manual calls it. :-) I'm going to rescan
> > > > today, tho, based off of stuff I've learned over the last few weeks
> > > > (this list is a very useful resource for seeing how other people are
> > > > doing stuff :-). -rt
> > > >
> > > > On Thu, 15 Feb 2001 12:46:18 -0800 (PST), "Gary E. Miller"
<gemIZZATrellim.com> wrote:
> > > > > Yo Ryan!
> > > > >
> > > > > I have been playing with serveral of these for the last few
months.
> > > > >
> > > > > >From what I understand, ServerIrons can load balance at the
> > > > > Layer 4 level (http, httpd, etc.), but not on the the Layer 2
level (MAC).
> > > > >
> > > > > You have no Layer 4 balancing commands at all in your config.
> > > > > They start with "server real .." and "server virtual ...".
> > > > >
> > > > > At the Layer 2 (MAC or switch layer) it just does spanning tree.
> > > > > Spanning tree does not do any balancing. Instead it prevents
> > > > > loops by disabling (BLOCKING) interfaces that would cause loops.
> > > > >
> > > > > The Foundry docs are online at www.foundrynet.com. They are a
> > > > > bit verbose, but they accurately lead you to working configs.
> > > > >
> > > > > RGDS
> > > > > GARY
> > > >
> --------------------------------------------------------------------------
-
> > > > > Gary E. Miller Rellim 20340 Empire Ave, Suite E-3, Bend, OR 97701
> > > > > gemIZZATrellim.com Tel:+1(541)382-8588 Fax: +1(541)382-8676
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Ryan Tucker [mailto:rtuckerIZZATnetacc.net]
> > > > > > Sent: Thursday, February 15, 2001 2:29 PM
> > > > > > To: lb-lIZZATvegan.net
> > > > > > Subject: [load balancing] Cascading switches off of a Foundry
switch
> > > > > >
> > > > > >
> > > > > > Greetings...
> > > > > >
> > > > > > We have a Foundry ServerIron XL with 8 ports on it... it's wired
into
> > > > > > the rest of our network with a spanning-tree configuration on
ports 1
> > > > > > and 8... logically, it's off of a HP ProCurve 4000M, which also
has
> > > > > > another ProCurve off of it, and there's a couple other switches
off of
> > > > > > there, etc.
> > > > > >
> > > > > > Basically, what we need to do is be able to have the Foundry
> > > > > > load-balance traffic to servers that are not directly plugged
into it...
> > > > > > we've tried the obvious thing (Just Doing It), and it recognizes
that
> > > > > > the destination is up, but it doesn't let connections switch
over.
> > > > > >
> > > > > > Is there a config option I'm missing? :-)
> > > > >
> > > >
> > > > --
> > > > Ryan Tucker <rtuckerIZZATnetacc.net> Network Operations
Manager
> > > > NetAccess, Inc. Phone: +1 716
419-8200
> > > > 1159 Pittsford-Victor Road, Pittsford NY 14534
http://www.netacc.net/
> > > > "Wouldn't you rather help make history than watch it on TV?" - Jello
Biafra
> > > >
> > >
> >
> > -------------- -- ---- ---- --- - - - - - -- - - - - - -
> > Tony Bourke tonyIZZATvegan.net
> >
> >
>
>
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