Re: [load balancing] Re: ALteon FWLB/SLB/WCR Question?

From: Wei Keong (chooweikeongIZZATpacific.net.sg)
Date: Wed Jun 11 2003 - 05:18:35 EDT

  • Next message: Wei Keong: "Re: [load balancing] Alteon L7 config"

    Hi Tino,

    How do you test the cache hit? Do you use the following?

    telnet Y.Y.Y.Y 80
    GET http://www.abc.com HTTP/1.0

    Which version of WebOS is your Alteon running?

    This is what I got from Peter Degrassi <degrassiIZZATnortelnetworks.com> last
    time...

    > Hi Wei,
    >
    > What you are seeing is working as designed...
    >
    > Hashing (on redir filter)
    > =========================
    > If "fwlb ena"
    > hash on SIP&DIP
    > else
    > if ("dport 80" | "dport 21")
    > hash on DIP
    > elseif ("sport 80" | "sport 21")
    > hash on SIP
    > else
    > hash on SIP&DIP
    > endif
    > endif
    >
    > Peter

    Rgds,
    Wei Keong

    On Wed, 11 Jun 2003, Tino wrote:

    > We use an Alteon to redirect traffic to 2 Cache Appliances. Refer to the redirection filter (below) where
    >
    > fwlb=dis,
    > group 2 is where the 2 Cache devices are defined,
    > and metric is hash.
    >
    > /cfg/slb/filt XXX
    > ena
    > actio redir
    > sip any
    > smask 0.0.0.0
    > dip Y.Y.Y.Y
    > dmask Z.Z.Z.Z
    > proto tcp
    > sport any
    > dport http
    > group 2
    > rport 80
    >
    > With the above config, we only get hit on one Cache device. If I do fwlb=en, then I get hits on both which is what we want.
    > I want to maximize the Cache hits on both Cache devices and wondering what is the best metric to use. Thanks.
    >
    > ____________________________________________________________________
    > Reply from Henry
    >
    > FWLB and WCR normally use redirection filters to forward traffic. By default the
    > switch will assume you are configuring a WCR filter when you specify
    > a filter with proto TCP, dport of http or dport ftp. In this case the
    > switch will select a real server based on the DIP.
    >
    > In 10.0 you can configure redirection filters to use the following:
    > 1) SIP
    > 2) DIP
    > 3) BOTH
    > 4) SIP and SPORT
    >
    > This is done via the thash command under /cfg/slb/filt xxx/adv
    >
    > Prior to and including 10.0 you can configure the switch to use both SIP and DIP
    > via the FWLB option under /cfg/slb/filt xxx/adv.
    >
    >
    > Basic SLB will use CIP to select a real server when hash is used as the group
    > metric.
    >
    > Henry
    > -------------------------------------------------------------------------------------------------------------------------------
    > ----- Original Message -----
    > From: Tino
    > To: Nortel Alteon Forum
    > Sent: Thursday, June 05, 2003 10:15 AM
    > Subject: ALteon FWLB/SLB/WCR Question?
    >
    >
    > Hi all,
    >
    > Just wondering which part of the configuration on the Alteon determines whether
    > it is FWLB,SLB or WCR since the Alteon hashing method varies depends on the type of Load Balancing.
    >
    > Regards - Tino
    >

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