Re: [load balancing] Cascading switches off of a Foundry switch

From: KJ & JC Salchow (salchowIZZATfrontiernet.net)
Date: Fri Feb 16 2001 - 01:29:53 EST

  • Next message: KJ & JC Salchow: "Re: [load balancing] Cascading switches off of a Foundry switch"

    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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