Load balancing and server session

if i configure SLB what will happen if the server initiate connection back to client for example authentication or for a data transfer.
Will the server still use the virtual ip?
example below server3 initiating a session (example authentication) back to client. will it use the virtual ip?
client ------virtual----server1----server3---client

The server will use the VIP if you configure a source group as shown below. You must have a content rule with the same VIP and services.
owner myorganization
content serverfarm
add service server1
add service server2
vip address 172.16.36.58
active
group serverfarm
vip address 172.16.36.58
add service server1
add service server2
active

Similar Messages

Client side load balancing and server side load balancing

Hello Team,
I need to know how to set up client and server side load balancing in oracle rac. What all things to be implemented like creating a service, tnsnames.ora settings etc.
And also if i used SCAN ip instead of VIP. how the settings will change.
Regards,

Hi,
please find here an Whitepaper with the information
http://www.oracle.com/technetwork/database/features/availability/maa-wp-11gr2-client-failover-173305.pdf
kind regards

Load Balancing and WLS primary server offset

I've got a load balancer in front of my WLS cluster, and I'm trying to
          set up load balancing based on WLS clustering. What I need to know to
          do this is the offset within the cookie that's responsible for
          determining which machine within the cluster to direct to.
          Any idea how I can get this information?
          thanks,
          cfraser


Chris Fraser wrote:
          > The proxy/plug-in solution sounds pretty cool, but I've got a high speed
          > Alteon Load Balancer already set up. I would prefer to use that as the load
          > balancer to the WL cluster rather than pay to bring another WLS online to do
          > pretty much what the load balancer, that I already own, can do. I know that
          > going this route means that we're probably not going to be able to do things
          > like failover to the secondary when the primary dies, but we will be able to
          > load balance and also have the ability to dynamically add/delete servers
          > from the list of available servers as they are brought up/down.
          In Memory session replication doesn't work without our plugins. I will have to
          do little bit of investigation to figure out if other persistence mechanism's
          would work without our plugins if you are interested in them. I have to remind
          you though that other types of persistence mechanism's we support are slower
          compared to in memory session replication.
          > Are there any plans to work with an Alteon or a Foundry to have their Load
          > Balancers act as the front end to a WLS cluster?
          Currently none. We are taking steps to make the plugin's and cluster more
          robust, we currently don't have any plans to work with other 3rd party vendors.
          > For us it would be ideal, because we wouldn't have to support another piece of
          > software, we would just
          > have to support the hardware based Alteon, which can handle thousands of
          > transactions per second.
          > I understand that the primary and secondary server information is available
          > in the sessionID, I'm just not quite sure how to extract it.
          This information is saved in the cookie. But I wouldn't count that, as we
          have plans to change this. I cannot give your more details.
          > Is there a particular offset within the session ID where it can always be
          > found?
          I don't quite get what you mean here.
          Hope this helps.
          - Prasad
          > thanks for the help,
          > cfraser
          > ----------
          > C h r i s t o p h e r A . F r a s e r
          > Director, Technology
          > macroplay.com, Inc.
          > [email protected]
          >
          > Viresh Garg wrote:
          >
          > > You should be using
          > > -- NES +NSAPI Plugin
          > > -- IIS + ISAPI Plugin
          > > -- WEblogic server acting as proxy
          > > -- Apache +Apache Plugin ( only in Denali)
          > >
          > > front-ending your Weblogic cluster
          > >
          > > These proxies/plug-ins are smart to do a lot of things like:
          > >
          > > -- Load balancing in weblogic cluster
          > > -- Adding/deleting servers dynamically in cluster when the servers
          > > join/leave Weblogic cluster
          > > -- failover to secondary when primary dies.
          > >
          > > As far as the information about primary and secondary is concerned it is
          > > available in session ID.
          > >
          > > --Viresh Garg
          > >
          > > Chris Fraser wrote:
          > >
          > > > I've got a load balancer in front of my WLS cluster, and I'm trying to
          > > > set up load balancing based on WLS clustering. What I need to know to
          > > > do this is the offset within the cookie that's responsible for
          > > > determining which machine within the cluster to direct to.
          > > >
          > > > Any idea how I can get this information?
          > > >
          > > > thanks,
          > > > cfraser

Network Load balancing for Server 2003 and Server 2012

Our environment currently has 2 web servers running Windows Server 2003 with Network Load Balancing. We are looking to update the servers to Windows Server 2012. Is it possible to add Windows Server 2012 into the Windows Server 2003 Network Load
balancing cluster? This way we could bring up 2 new servers add them into the network load balancing and then take out the 2003 servers without disrupting our production.
Any thoughts or suggestions on how to make this work properly?

Hi,
You can upgrade an existing Network Load Balancing (NLB) cluster to Windows Server 2008, Windows Server 2008 R2, or Windows Server 2012 by taking the entire cluster offline
and upgrading all the hosts, or you can leave the NLB cluster online and perform a rolling upgrade. A rolling upgrade entails taking individual cluster hosts offline one at a time, upgrading each host, and returning the host to the cluster. You continue upgrading
individual cluster hosts until the entire cluster is upgraded. A rolling upgrade allows the cluster to continue running during the upgrade.
The related KB:
Upgrading an Existing Network Load Balancing Cluster
http://technet.microsoft.com/en-us/library/cc731691(v=ws.10).aspx
Hope this helps.
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

For a true load balancing and high-availability OHS, OPMN, and mod_oc4j

i have read this link of Enabling Clustering on oc4j9.0.4 standalone app server
http://www.oracle.com/technology/docs/tech/java/oc4j/htdocs/getstart.htm#1015479
To test the clustering, start up the load balancer by executing "java -jar loadbalancer.jar".
C:\OC4J_EXTENDED\j2ee\home>java -jar loadbalancer.jar
In a future release of Oracle Application Server, loadbalancer.jar will be
desupported. Because of this, we strongly suggest that you discontinue your use
of loadbalancer.jar in this release. Under high loads, loadbalancer.jar may not
function properly. For a true load balancing and high-availability solution,
please move to use OHS, OPMN, and mod_OC4J. For more information, please see
http://otn.oracle.com/products/ias/ohs/content.html
Balancer initialized...
what load balancer should i use for web clustering
<frontend host="balancer-host" port="balancer-port" />
balancer-host=localhost
balancer-port=80
for all nodes i mentioned same host and port in http-web-site.xml.Is it correct?
i completed all the steps and run http://localhost:6666/session/SessionServlet
i hit 3 times
in the different browser http://localhost:7777/session/SessionServlet
instead of coming 4 it starting from 1 only.

can i use this loadbalancer.jar or not?
how to mod_oc4j in standalone app server

Load balancing and High Availability topology

Our Forms 6i client-server application currently runs on Citrix farm of 20 Windows 2000 boxes (IBM Blade Servers 2 CPU and 2 Gig Memory).
Application supports 2000 users.
We are moving to AS 10g r2, forms 10g and the goal is to use same hardware, 20 Windows boxes (or less), for intranet web deployment.
What will be our best choices for application Load balancing and High Availability?
Hardware load balancer, Web Cache, mod-oc4j? Combinations?
Any suggestions, best practices, your experience?

Gerd, I understand, that you are running 10g web forms through the browser, but using Citrix for deployment. This means that in addition to Application Server and Forms runtime sessions, it will be separate browser session opened for each user. What the advantage of this configuration?
Michael, we are aware, that Citrix is not supported by Oracle as a deployment platform. That only means that prior contacting Oracle Support we have to reproduce the problem in standard environment. It was never been a problem to reproduce problem :) We were using Citrix as a deployment platform for Forms 6i client/server for 4 years, but now we are forced to upgrade to 10g.
We are familiar with various Load balancing options available. The question is which option is the most "workable" in our case.

TES6.1 Load Balancing and DSP

Haven't gotten much response to my other posts, hoping I get some about this.
For those using load balancing, do you name your DSP the same on both servers? I was trying to see if there were pros and cons to naming them different or the same (or if you can't name them the same).
We have them named different, one is TesDevCM1 and the other is TesDevCM2. This makes it easier to troubleshoot and know where someone is connected BUT I realize that this is not good when you are trying to truly utilize loadbalancing for example for Transporter and TESCmmandline as this forces you to bound these apps to a specific CM.
Just wanted to see if there were opinions out there. (Made my post shorter, hopefully someone will respond ^_^)

Hi Jesse,
Actually it works after you asked me to go through the web cache documentation which i posted question on how to do the load balancing and failover. Thanks for you help. I just want to double confirm whether i did correctly. Since i have problem in passing the session variables. Which the server switch between the two servers for load balacing, it can't bring the session variables from server 1 to server 2. It will give error on the pages. I want to ask whether anyway to bring the session variables from server1 to server2??
Besides, can you please tell me if i just wanted to have failover but not load balancing, can this be done???
Thanks
Regards,
Ming Jade

WLS6.1sp1 stateful EJB problem = load-balancing and fail over

          I have three problem
          1. I have 2 clustered server. my weblogic-ejb-jar.xml is here
          <?xml version="1.0"?>
          <!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
          'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
          <weblogic-ejb-jar>
          <weblogic-enterprise-bean>
               <ejb-name>DBStatefulEJB</ejb-name>
               <stateful-session-descriptor>
               <stateful-session-cache>
                    <max-beans-in-cache>100</max-beans-in-cache>
                    <idle-timeout-seconds>120</idle-timeout-seconds>
               </stateful-session-cache>
               <stateful-session-clustering>
                    <home-is-clusterable>true</home-is-clusterable>
                    <home-load-algorithm>RoundRobin</home-load-algorithm>
                    <home-call-router-class-name>common.QARouter</home-call-router-class-name>
                    <replication-type>InMemory</replication-type>
               </stateful-session-clustering>
               </stateful-session-descriptor>
               <jndi-name>com.daou.EJBS.solutions.DBStatefulBean</jndi-name>
          </weblogic-enterprise-bean>
          </weblogic-ejb-jar>
          when i use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
          and deploy this ejb, exception cause
          <Warning> <Dispatcher> <RuntimeException thrown b
          y rmi server: 'weblogic.rmi.cluster.ReplicaAwareServerRef@9 - jvmid: '2903098842
          594628659S:203.231.15.167:[5001,5001,5002,5002,5001,5002,-1]:mydomain:cluster1',
          oid: '9', implementation: 'weblogic.jndi.internal.RootNamingNode@5f39bc''
          java.lang.IllegalArgumentException: Failed to instantiate weblogic.rmi.cluster.B
          asicReplicaHandler due to java.lang.reflect.InvocationTargetException
          at weblogic.rmi.cluster.ReplicaAwareInfo.instantiate(ReplicaAwareInfo.ja
          va:185)
          at weblogic.rmi.cluster.ReplicaAwareInfo.getReplicaHandler(ReplicaAwareI
          nfo.java:105)
          at weblogic.rmi.cluster.ReplicaAwareRemoteRef.initialize(ReplicaAwareRem
          oteRef.java:79)
          at weblogic.rmi.cluster.ClusterableRemoteRef.initialize(ClusterableRemot
          eRef.java:28)
          at weblogic.rmi.cluster.ClusterableRemoteObject.initializeRef(Clusterabl
          eRemoteObject.java:255)
          at weblogic.rmi.cluster.ClusterableRemoteObject.onBind(ClusterableRemote
          Object.java:149)
          at weblogic.jndi.internal.BasicNamingNode.rebindHere(BasicNamingNode.jav
          a:392)
          at weblogic.jndi.internal.ServerNamingNode.rebindHere(ServerNamingNode.j
          ava:142)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          2)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
          at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)
          So do i must use it or not???
          2. When i don't use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
          , there's no exception
          but load balancing does not happen. According to the document , there's must load
          balancing when i call home.create() method.
          my client program goes here
               DBStateful the_ejb1 = (DBStateful) PortableRemoteObject.narrow(home.create(),
          DBStateful.class);
               DBStateful the_ejb2 = (DBStateful) PortableRemoteObject.narrow(home.create(3),
          DBStateful.class);
          the result is like that
               the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@4695a6)/397
               the_ejb2 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@acf6e)/398
               or
               the_ejb1 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@252fdf)/380
               the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@6a0252)/381
               I think the result should be like under one... isn't it??
               the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@4695a6)/397
               the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@6a0252)/381
          In this case i think the_ejb1 and the_ejb2 must have instance in different cluster
          server
          but they go to one server .
          3. If i don't use      "<home-call-router-class-name>common.QARouter</home-call-router-class-name>",
          "<replication-type>InMemory</replication-type>" then load balancing happen but
          there's no fail-over
          So how can i get load-balancing and fail over together??


          I have three problem
          1. I have 2 clustered server. my weblogic-ejb-jar.xml is here
          <?xml version="1.0"?>
          <!DOCTYPE weblogic-ejb-jar PUBLIC '-//BEA Systems, Inc.//DTD WebLogic 6.0.0 EJB//EN'
          'http://www.bea.com/servers/wls600/dtd/weblogic-ejb-jar.dtd'>
          <weblogic-ejb-jar>
          <weblogic-enterprise-bean>
               <ejb-name>DBStatefulEJB</ejb-name>
               <stateful-session-descriptor>
               <stateful-session-cache>
                    <max-beans-in-cache>100</max-beans-in-cache>
                    <idle-timeout-seconds>120</idle-timeout-seconds>
               </stateful-session-cache>
               <stateful-session-clustering>
                    <home-is-clusterable>true</home-is-clusterable>
                    <home-load-algorithm>RoundRobin</home-load-algorithm>
                    <home-call-router-class-name>common.QARouter</home-call-router-class-name>
                    <replication-type>InMemory</replication-type>
               </stateful-session-clustering>
               </stateful-session-descriptor>
               <jndi-name>com.daou.EJBS.solutions.DBStatefulBean</jndi-name>
          </weblogic-enterprise-bean>
          </weblogic-ejb-jar>
          when i use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
          and deploy this ejb, exception cause
          <Warning> <Dispatcher> <RuntimeException thrown b
          y rmi server: 'weblogic.rmi.cluster.ReplicaAwareServerRef@9 - jvmid: '2903098842
          594628659S:203.231.15.167:[5001,5001,5002,5002,5001,5002,-1]:mydomain:cluster1',
          oid: '9', implementation: 'weblogic.jndi.internal.RootNamingNode@5f39bc''
          java.lang.IllegalArgumentException: Failed to instantiate weblogic.rmi.cluster.B
          asicReplicaHandler due to java.lang.reflect.InvocationTargetException
          at weblogic.rmi.cluster.ReplicaAwareInfo.instantiate(ReplicaAwareInfo.ja
          va:185)
          at weblogic.rmi.cluster.ReplicaAwareInfo.getReplicaHandler(ReplicaAwareI
          nfo.java:105)
          at weblogic.rmi.cluster.ReplicaAwareRemoteRef.initialize(ReplicaAwareRem
          oteRef.java:79)
          at weblogic.rmi.cluster.ClusterableRemoteRef.initialize(ClusterableRemot
          eRef.java:28)
          at weblogic.rmi.cluster.ClusterableRemoteObject.initializeRef(Clusterabl
          eRemoteObject.java:255)
          at weblogic.rmi.cluster.ClusterableRemoteObject.onBind(ClusterableRemote
          Object.java:149)
          at weblogic.jndi.internal.BasicNamingNode.rebindHere(BasicNamingNode.jav
          a:392)
          at weblogic.jndi.internal.ServerNamingNode.rebindHere(ServerNamingNode.j
          ava:142)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          2)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.BasicNamingNode.rebind(BasicNamingNode.java:36
          9)
          at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)
          at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)
          So do i must use it or not???
          2. When i don't use "<home-call-router-class-name>common.QARouter</home-call-router-class-name>"
          , there's no exception
          but load balancing does not happen. According to the document , there's must load
          balancing when i call home.create() method.
          my client program goes here
               DBStateful the_ejb1 = (DBStateful) PortableRemoteObject.narrow(home.create(),
          DBStateful.class);
               DBStateful the_ejb2 = (DBStateful) PortableRemoteObject.narrow(home.create(3),
          DBStateful.class);
          the result is like that
               the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@4695a6)/397
               the_ejb2 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@acf6e)/398
               or
               the_ejb1 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@252fdf)/380
               the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@6a0252)/381
               I think the result should be like under one... isn't it??
               the_ejb1 = ClusterableRemoteRef(203.231.15.167 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@4695a6)/397
               the_ejb2 = ClusterableRemoteRef(203.231.15.125 weblogic.rmi.cluster.PrimarySecon
               daryReplicaHandler@6a0252)/381
          In this case i think the_ejb1 and the_ejb2 must have instance in different cluster
          server
          but they go to one server .
          3. If i don't use      "<home-call-router-class-name>common.QARouter</home-call-router-class-name>",
          "<replication-type>InMemory</replication-type>" then load balancing happen but
          there's no fail-over
          So how can i get load-balancing and fail over together??

FIM Load Balancing and SPN's - Strange behaviour

I have a FIM setup in a domain
I have mycorp.com and a domain in the same forest contractor.mycorp.com (fictional setup)
I have 2 servers built in the contractors.mycorp.com domain
Id1
Id2
Id1 has the Service and portal on wss3 in SharePoint farm mode, Sp central admin is on this as well
Id2 has the service and is a load balanced SharePoint farm.
I have NLB setup and working the service name is identity.mycorp.com pointing at the IP of the NLB
I have a CNAME identity pointing at identity.mycorp.com
Identity.mycorp.com is used as the name of the Service and the Portal.
In the ApplicationHost.config I have
<system.webServer>
   <security>
      <authentication>
         <windowsAuthentication enabled="true" useKernelMode="true"
useAppPoolCredentials="true" />
      </authentication>
   </security>
</system.webServer>
I have kernel mode enabled, and I have Windows authentication enabled in the IIS console on id1 and id2.
The app pool credentials are a domain account SPService for SharePoint Service, the app pool is set on both id1 and id2 servers. The root domain account mycorp\SPService us used.
In
c:\inetpub\wwwroot\wss\VirtualDirectories
I have set
<resourceManagementClient
requireKerberos="true"
I have registered the alternate URL mappings for SharePoint as
Identity
Identity.myCorp.com
I have registered SPN's for
Setspn –S FIMService/identity.myCorp.com myCorp\FIMService
Setspn –S FIMService/identity myCorp\FIMService
Setspn –S HTTP/identity.myCorp.com myCorp\SPService
Setspn –S HTTP/identity myCorp\SPService
I have configured delegation for both accounts in ADUC for the identity.mycorp.com
So all is well and I installed everything fine.
Now my problem is that if I go to id1 and browse to http://identity/identitymanagement I get redirected , and authenticated with my admin account to
http://id1/IdentityManagement/default.aspx
On id1 if I go to http://identity.myCorp.com/identitymanagement I get prompted for credentials, when I enter myCorp\FIMAdmin and my password I get redirected to the portal at
http://id1/IdentityManagement/default.aspx
If I try and authenticate to any of the previous URL's from other machines in my domain, including the load balanced box id2 I get "HTTP Error 401. The requested resource requires user authentication."
Even if I try and browse to
http://id1/identitymanagement from another machine I am getting 401. Only on
http://id1 am I getting a result, even if there is a prompt.
I am sure my SPN's are fine, there are no duplicate SPN's , I checked with the -x switch
So my load balanced portal and service are not working as I would have thought , I have looked at
http://blogs.msdn.com/b/webtopics/archive/2009/01/19/service-principal-name-spn-checklist-for-kerberos-authentication-with-iis-7-0.aspx
http://social.technet.microsoft.com/Forums/en-US/484faae8-4df6-4b81-8b2d-9d75d5258e4f/fim-portal-http-error-401-the-requested-resource-requires-user-authentication?forum=ilm2
http://social.technet.microsoft.com/wiki/contents/articles/4473.fim-http-error-401-the-requested-resource-requires-user-authentication.aspx
http://setspn.blogspot.ie/2010/06/kerberos-basic-troubleshooting-tip-3.html
The only thing that I can think of is that the machine is in the contractors.myCorp.com domain which makes the machine
unique from where the SPN's are registered, but if that was the case then browsing to the portal from
http://id1 would certainly fail.
Can anyone see anything wrong with my approach ?
Normally I find SharePoint a pain, but this week it seems to be this.
When I ran the fim service install I specified identity.myCorp.com as the name of the server
Rob

In my Load Balanced setup it helped a lot (on some strange behaviours) when I set up Load Balancer to keep session on one server.
Borys Majewski, Identity Management Solutions Architect (Blog: IDArchitect.NET)

CSS11503 load balancing virtual server IP's

Hi CSS experts,
We have a Cisco Content Services Switch 11503 Load Balancer which seems to require Real Server NICs to be plugged in. When I plug a cable from our Cisco 3560 switch into the Cisco Load Balancer, it can't see the 2 web server IP's that I'm trying to load balance for HTTP/HTTPS. The virtual IP does not display the webpage of either web servers.
On the otherhand, when I use two physically separate 1U web servers and physically plug 2 cables (1 for each server) into the CSS 8 port switch, the virtual IP is able to redirect the traffic to both web servers.
How do I configure the CSS to load balance and actually see 2 IP's on the network which isn't plugged in physically per server into the CSS 8 port switch.
Internet->CSS->1 cable plugged into Cisco switch which host 2 web servers.
Thanks,
Mike
Configuration:
circuit VLAN1
ip address 192.168.1.10 255.255.255.0
service Websrv1
ip address 192.168.1.104
protocol tcp
port 80
keepalive type http non-persistent
active
service Websrv1SSL
ip address 192.168.1.104
protocol tcp
port 443
keepalive type ssl
active
service Websrv2
ip address 192.168.1.101
protocol tcp
port 80
keepalive type http non-persistent
active
service Websrv2SSL
ip address 192.168.1.101
protocol tcp
port 443
keepalive type ssl
active
owner Web
content NG
add service Websrv1
add service Websrv2
vip address 192.168.1.7
port 80
protocol tcp
advanced-balance arrowpoint-cookie
url "/*"
active
content NGSSL
add service Websrv1SSL
add service Websrv2SSL
vip address 192.168.1.7
port 443
protocol tcp
advanced-balance sticky-srcip
sticky-inact-timeout 60
active

I checked the connectivity to the servers form the CSS and it was good. I was able to ping, and the connection status in sh service summary incremented by 1 each time I tried to connect. From the server, I was able to ping back to the IP of the CSS and the VIP address as well. I have tried using only 1 server for 1 VIP. I have tried changing the default gateway on the server to the IP of the CSS and the VIP IP as well. It still doesn't seem to help. Anymore suggestions for me to try?
Thanks
Mike

VPN load balancing and ASA !!!

Hi netpros,
I have a couple of questions about this and hope you might be able to assist me.
1.- Are VPN load balancing and failover (Active/Active) mutually exclusive ..? I mean they can't be used at the same time correct ..?
2.- How does the ASA handle the return traffic from the Internal LAN towards the remote client .. Because the cluster only requires ONE public virtual IP address, which will work for incoming packets .. but what about the return traffic which has knowledge of the DHCP scope's default gateway IP address only .. ? How gets the returned packet redirected from the default gateway IP address to the respective ASA internal IP address .?
3.- VPN load balancing only applies to remote clients using easy VPN technology (easy vpn client, hardware client , pIX using easy vpn client etc ) and does not work with static LAN-LAN tunnel .. correct ..?
Your comments are much appreciated

Hi Gilbert ..
1.- Thanks I wanted to make sure.
2.- I know that .. my question is in regards the return packets .. for example if I have the below IP schema:
ASA1: Public 20.20.20.20
Private 192.168.1.1
ASA2: Public 20.20.20.21
Private 192.168.1.2
Cluster virutal IP: 20.20.20.10
Default gateway for segment 192.168.1.0 is 192.168.1.1
Let's say that a vpn client tries to connect and the cluster instructs the client to connect to ASA2 20.20.20.21. The packets reach the internal server at 192.168.1.100. The internal server then sends the return packets back to the client by forwarding them to its default gateway which is 192.168.1.1 (ASA1). Here is my question .. how does the cluster handles this because the return packet are supposed to be directed to ASA2 192.168.1.2
3.- Any idea about this one ..?
Cheers,

Load balancing and rfc metadata repository in reciever rfc communication ch

hi.
i want to know the purpose of load balancing and rfc meta data repository in RFC communication channel.
and can u send me any examples on this load balancing.
waiting for your response.
bye.
regards.
seeta ram.

Hi Seeta Ram,
Load distribution is handled by the message server (there is one message server in an SAP System). When a user logs on, the message server assigns him or her to the application server that currently has the <b>smallest load</b>.
Well now you can understand that we use load balancing for better performance by distributing the work to different processes to balance or maintain the work load in SAP system.
For more information refer to this link
http://help.sap.com/saphelp_nw04/helpdata/en/28/75153a1a5b4c2de10000000a114084/content.htm
Regards
Sumit Bhutani

Advantages of using a webserver inbetween a load balancer and application servers

I am building out a new weblogic domain.
I am wondering which one of these configuration to go with:
1. Load balancer > weblogic servers
2. Load balancer > web server > weblogic servers
Could someone tell me what are the specific advantages of having web servers inbetween a load balancer and application servers (besides caching static data content and acting as a proxy)?
Thanks in advance
Srini

Other than hosting the static content, nothing much really. We have our load balancer go straight to WL for applications without static content and route to web server if there is static content. Easy enough to do it both ways, best of both worlds.

2 ISP load balancing and redundancy

Hello!!
Our small company has about 40 branches spreaded within city. Branches are connected by optic wire supplied by our ISP. So in ISP our branches are located in one VLAN. From every branch we created VPN tunnel to our server room in central office. Central office is like a cetner point. If optic wire fails to central office, there would no VPN tunnels and no network to all branches. Moreover, all the traffice goes through central office.
Now we decided to pave one more optic line to our central office. And that will increase bandwidth and redundancy.
Private network topology: There are no default gateways and ip-addresses. For examle, at first branch I will plug computer directly into media converter and at the second branch plug another computer to the media converter. After that this two computers became in one network. And can assign any ip addresses to them.
What I have: our firewall do enough work, don't want to overload it. But we have some free ports in our new cisco 3750. The question is how to do load balancing and redundanccy? Can it do load balancing according to traffic? And how load balance incoming traffic? For example, connection was established from branche's router, how this router will choose through which line make connection? By the way, at all branches we use noisy cisco
3700 series routers.

Sorry for upping 1 year old threat.
We talked to our Network Provider. They said "these two cables are coming from two different places, so there is no way to use etherchannel. You must use active-standby solution."
Relying on STP we just put two cables into 3750 stack. But with default STP settings, connection was very unstable, many packet losses and disconnections. So we found easy solution with "flex links", making one interface backup of the other. And only now I recognized that this is not a failover solution. Because, if network beyond media converter will down, link from media converter to switch would still up.
What could I do to make our L2 WAN redundant? Are there any additional STP settings.

Load balancing and Failover

Hello,
We are wondering how load-balancing and failover of tpcall() work with
WTC:
The scenario:
We have one WLS Domain and two Tuxedo Domains. The Tuxedo Domains offer
the same set of services.
In the bdmconfig.xml, we specify connection_policy as 'ON_STARTUP' for
both Remote Tuxedo Domains. We also Import (T_DM_IMPORT) the same
Tuxedo Service from both Tuxedo Domains.
Questions:
1. Is there any load-balancing of the tpcall between the two Domains? If
so, is it round-robin? If round-robin, what determines the order?
2. If it is ONLY Failover, what determines the order of the tpcall? And,
is the Failover automatic? Or do we need to code for retry on failure?
3. ON_DEMAND vs ON_STARTUP: Does ON_DEMAND drop the connection to the
remote domain upon tpterm? And does ON_STARTUP use a pool of
TuxedoConnection objects?
4. Are there any configuration parameters for
'max_number-of_connections? What determines how many simultaneous
connections can be made?
Thanks,
Suresh Mohan.

Hi Suresh,
The following are my answers to your questions.
Suresh Mohan wrote:
Hello,
We are wondering how load-balancing and failover of tpcall() work with
WTC:
The scenario:
We have one WLS Domain and two Tuxedo Domains. The Tuxedo Domains offer
the same set of services.
In the bdmconfig.xml, we specify connection_policy as 'ON_STARTUP' for
both Remote Tuxedo Domains. We also Import (T_DM_IMPORT) the same
Tuxedo Service from both Tuxedo Domains.
Questions:
1. Is there any load-balancing of the tpcall between the two Domains? If
so, is it round-robin? If round-robin, what determines the order?Yes there is a load balancing between two remote Tuxedo TDomain Gateways.
The algorithm is random, not RR. Over time this should give equal
opportunities to both remote TDomain.
>
2. If it is ONLY Failover, what determines the order of the tpcall? And,
is the Failover automatic? Or do we need to code for retry on failure?The load balancing is always there. The failover is automatic. When a
connection to a remote TDomain encountered a problem (ie network) the remote
domain will be put on retry open connection (in ON_STARTUP) and the load
balancing will not select it until the connection re-established.
However, the tpcall() that encountered the error will not be retried to send
to different destination. It is up to the application to decide whether it
want to resend. Any requests called after the error will not select the
failed Remote TDomain.
>
3. ON_DEMAND vs ON_STARTUP: Does ON_DEMAND drop the connection to the
remote domain upon tpterm? And does ON_STARTUP use a pool of
TuxedoConnection objects?TPTERM() only terminate your application session to WTC. WTC still maintain
a secured T-session to remote Tuxedo TDomain. WTC does not use a pool of
TuxedoConnection Objects, the object stored in the JNDI refers to WTC.
>
4. Are there any configuration parameters for
'max_number-of_connections? What determines how many simultaneous
connections can be made?No. As described in #3, there is no need to use connection pool in WTC. WTC
uses session and virtual circuit design concept as Tuxedo TDOMAIN, the
logical pool is created/destroyed dynamically. That is the reason why you
can have a lot of TPACALL() outstanding at the same time. (The limitation is
the availability system resource.)
>
>
Thanks,
Suresh Mohan.Regards,
Hong-Hsi :-)

Load balancing and server session

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