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List: loadbalancing-l
Subject: Re: [load balancing] [BIGIP] LeastConn with Source IP persistence
From: lijian97 () netscape ! net
Date: 2006-08-09 14:09:39
Message-ID: 8C889D4961C702C-A08-20921 () mblkn-m03 ! sysops ! aol ! com
[Download RAW message or body]
Hi,
Thanks for help !
In our case, the client IP are not proxied or N:1 NATing, but sometimes nodes are \
flapped. However, I think after a while BIGIP should be evenly balance traffic again \
after node coming back. In our case, it doesn't. It is quite strange.
When we used Alteon, we don't have this problem.
Thanks !
Jian
-----Original Message-----
From: Claret Carvalho <claretc@comcast.net>
To: lb-l@vegan.net
Sent: Sat, 29 Jul 2006 08:39:54 -0500
Subject: RE: [load balancing] [BIGIP] LeastConn with Source IP persistence
I know we have seen this unequal distribution only because a certain set of nodes \
were flapping at random periods of the day. I take it you have ruled out the \
mega-proxy issue (all clients masked behind a proxy). Not sure how the F5 algorithm \
for Least Conn is calculated, but it could be your connections are coming in/dropping \
out at a burst, thus landing on one or 2 nodes.
From: owner-lb-l@vegan.net [mailto:owner-lb-l@vegan.net] On Behalf Of \
lijian97@netscape.net
Sent: Saturday, July 29, 2006 2:35 AM
To: lb-l@vegan.net
Subject: [load balancing] [BIGIP] LeastConn with Source IP persistence
Hello, all
We are using BIGIP 3400 v9.1.1 to balance HTTP traffic. When using LeastConn, the \
connections are distributed to each pool member evenly. However, after adding \
source-IP persistence, the connections (and load) are not balanced. Usually one or \
two pool members carry 2 times of connection(load) than others. Anybody encounter \
same problem ? Any suggestion to solve it.
BTW, the number of client IP is more than 3000 IP,and client IPs are consecutive. \
Persistence is obligatory for our product.
Thanks !
Jian
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<DIV>Hi,</DIV>
<DIV> </DIV>
<DIV>Thanks for help !</DIV>
<DIV> </DIV>
<DIV>In our case, the client IP are not proxied or N:1 NATing, but sometimes nodes \
are flapped. However, I think after a while BIGIP should be evenly balance traffic \
again after node coming back. In our case, it doesn't. It is quite strange.</DIV> \
<DIV> </DIV> <DIV>When we used Alteon, we don't have this problem.</DIV>
<DIV> </DIV>
<DIV>Thanks !</DIV>
<DIV>Jian</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><BR>-----Original Message-----<BR>From: Claret Carvalho \
<claretc@comcast.net><BR>To: lb-l@vegan.net<BR>Sent: Sat, 29 Jul 2006 08:39:54 \
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<DIV class=Section1>
<DIV class=MsoNormal><FONT face=Arial color=navy size=2><SPAN style="FONT-SIZE: 10pt; \
COLOR: navy; FONT-FAMILY: Arial">I know we have seen this unequal distribution only \
because a certain set of nodes were flapping at random periods of the day. I take it \
you have ruled out the mega-proxy issue (all clients masked behind a proxy). Not sure \
how the F5 algorithm for Least Conn is calculated, but it could be your connections \
are coming in/dropping out at a burst, thus landing on one or 2 nodes. \
<o:p></o:p></SPAN></FONT></DIV> <DIV class=MsoNormal><FONT face=Arial color=navy \
size=2><SPAN style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: \
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<DIV class=MsoNormal><B><FONT face=Tahoma size=2><SPAN style="FONT-WEIGHT: bold; \
FONT-SIZE: 10pt; FONT-FAMILY: Tahoma">From:</SPAN></FONT></B><FONT face=Tahoma \
size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Tahoma"> owner-lb-l@vegan.net \
[mailto:owner-lb-l@vegan.net] <B><SPAN style="FONT-WEIGHT: bold">On Behalf Of \
</SPAN></B>lijian97@netscape.net<BR><B><SPAN style="FONT-WEIGHT: \
bold">Sent:</SPAN></B> Saturday, <?xml:namespace prefix = st1 ns = \
"urn:schemas-microsoft-com:office:smarttags" /><st1:date Year="2006" Day="29" \
Month="7" ls="trans" w:st="on">July 29, 2006</st1:date> <st1:time w:st="on" \
Minute="35" Hour="2">2:35 AM</st1:time><BR><B><SPAN style="FONT-WEIGHT: \
bold">To:</SPAN></B> lb-l@vegan.net<BR><B><SPAN style="FONT-WEIGHT: \
bold">Subject:</SPAN></B> [load balancing] [BIGIP] LeastConn with Source IP \
persistence</SPAN></FONT><o:p></o:p></DIV></DIV> <DIV class=MsoNormal><FONT \
face="Times New Roman" size=3><SPAN style="FONT-SIZE: \
12pt"><o:p> </o:p></SPAN></FONT></DIV> <DIV>
<DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana">Hello, all<o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana"> <o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana">We are using BIGIP 3400 v9.1.1 to balance HTTP traffic. When \
using LeastConn, the connections are distributed to each pool member \
evenly. However, after adding source-IP persistence, the connections (and \
load) are not balanced. Usually one or two pool members carry 2 times \
of connection(load) than others. Anybody encounter same problem ? Any suggestion \
to solve it.<o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana"> <o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana">BTW, the number of client IP is more than 3000 IP,and \
client IPs are consecutive. Persistence is obligatory for our \
product.<o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana"> <o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana">Thanks !<o:p></o:p></SPAN></FONT></DIV></DIV> <DIV>
<DIV class=MsoNormal><FONT face=Verdana size=2><SPAN style="FONT-SIZE: 10pt; \
FONT-FAMILY: Verdana">Jian<o:p></o:p></SPAN></FONT></DIV></DIV></DIV></DIV></DIV></DIV><!-- \
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