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??

Similar Messages

Load-balancing and fail-over between web containers and EJB containers

When web components and EJB components are run in different OC4J instances, can we achieve load-balancing and fail-over between web containers and EJB containers?
null

It looks like there is clustering, but not loadbalancing available for rmi
from the rmi.xml configuration. The application will treat any ejbs on the
cluster as one-to-one look-ups. Orion will go out and get the first ejb
available on the cluster. See the docs on configuring rmi.xml (and also the
note below).
That is a kind-of failover, because if machine A goes down, and the
myotherAejbs.jar are on machine B too, orion will go out and get the bean
from machine B when it can't find machine A. But it doesn't go machine A
then machine B for each remote instance of the bean. You could also specify
the maximum number of instances of a bean, and as one machine gets "loaded",
orion would go to the next available machine...but that's not really
loadbalancing.
That is, you can set up your web-apps with ejbs, but let all of the ejbs be
remote="true" in the orion-application.xml file:
<?xml version="1.0"?>
<!DOCTYPE orion-application PUBLIC "-//Evermind//DTD J2EE Application
runtime 1.2//EN" "http://www.orionserver.com/dtds/orion-application.dtd">
<orion-application deployment-version="1.5.2">
<ejb-module remote="true" path="myotherAejbs.jar" />
<ejb-module remote="true" path="myotherBejbs.jar" />
<ejb-module remote="true" path="myotherCejbs.jar" />
&ltweb-module id="mysite" path="mysite.war" />
... other stuff ...
</orion-application>In the rmi.xml you would define your clustering:
<cluster host="230.0.0.1" id="123" password="123abc" port="9127"
username="cluster-user" />
Tag that is defined if the application is to be clustered. Used to set up
a local multicast cluster. A username and password used for the servers to
intercommunicate also needs to be specified.
host - The multicast host/ip to transmit and receive cluster data on. The
default is 230.0.0.1.
id - The id (number) of this cluster node to identify itself with in the
cluster. The default is based on local machine IP.
password - The password configured for cluster access. Needs to match that
of the other nodes in the cluster.
port - The port to transmit and receive cluster data on. The default is
9127.
username - The username configured for cluster access. Needs to match that
of the other nodes in the cluster.

Forms load balancing and fail-over

Using cisco context switches instead of metric server/metric client. Having trouble making forms fail-over when a 9ias server fails. Has anybody done this?
If so, how?

Using cisco context switches instead of metric server/metric client. Having trouble making forms fail-over when a 9ias server fails. Has anybody done this?
If so, how?

OCS on a cluster with Load balancing and fail safe environment

Dear all,
i want to ask is there any documat or hints on how to do an OCS R2 installaiotn on 3 server with RAC option (clustered Fail Safe), how can i install OCS on a cluster with Load balancing and fail safe environment.
plz i need ur help
thanking u
[email protected]

Dear all,
i want to ask is there any documat or hints on how to do an OCS R2 installaiotn on 3 server with RAC option (clustered Fail Safe), how can i install OCS on a cluster with Load balancing and fail safe environment.
plz i need ur help
thanking u
[email protected]

Load Balance and failover over 2 lines.

We have 2 x Cat 6509 with Sup720 and are running Native IOS.
On Switch A, we have a 1GB link configured as an access link on Vlan 2 to DR site connected to a Cat 3550
On Switch B, we have a 1GB Link configured as a trunk to the same DR connected to another Cat 3550
We configured devices to be in VLAN 2 as we want them to use the 1GB link. And the 2nd 1GB link is a logical extension of our main site.
Now, I want to configure these 2 x 1GB link so that they now act as failover as well as Load balancing.
1. How do I do this?
2. Will I need to move the 1GB link on Switch A to switch B
3. Should I configure the Switch A link also as Trunk?
Please help.
Thanks

Do your 3550s run EMI or SMI? If they run EMI, why not run dynamic routing protocol between the 3550s and the 6500s? OSPF would be a good one to use, if you have hierarchical IP addressing. If your addressing is not hierarchical, then use EIGRP.
Other than this, the only other possible way I can think of is GLBP (http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_white_paper09186a00801541c8.shtml)
Prior to GLBP, you could also have used HSRP. But it's a bloody nuisance to configure, 'cuz you need to configure two different HSRP groups for the same pair of switches, then manually assigning different hosts/PCs to use different default gateways. As I said, bloody nuisance.
HTH.

Network Load Balancing not failing over properly

I have 2 MS 2012 servers setup in a NLB unicast configuration, with 2 NICs each on the same subnet. When I take down the second server (and only the second server) the FQDN goes offline. Below are the ipconfigs for each server. Any help
would be greatly appreciated!
Ethernet adapter Data NIC 192.168.220.172:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Intel(R) I350 Gigabit Network
#4
   Physical Address. . . . . . . . . : 6C-3B-E5-B2-48-60
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.220.172(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.220.1
   DNS Servers . . . . . . . . . . . : 192.168.220.100
                                       192.168.200.10
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Cluster NIC:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : Broadcom BCM57810 NetXtreme II
DIS VBD Client) #67
   Physical Address. . . . . . . . . : 02-BF-C0-A8-DC-AA
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.220.171(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   IPv4 Address. . . . . . . . . . . : 192.168.220.170(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.220.1
   DNS Servers . . . . . . . . . . . : 192.168.220.100
                                       192.168.200.10
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Data NIC 192.168.220.174:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : HP FlexFabric 10Gb 2-port 533FLR-
r #54
   Physical Address. . . . . . . . . : A0-D3-C1-F6-96-08
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.220.174(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.220.1
   DNS Servers . . . . . . . . . . . : 192.168.220.100
                                       192.168.200.10
   NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Cluster NIC:
   Connection-specific DNS Suffix . :
   Description . . . . . . . . . . . : HP NC523SFP 10Gb 2-port Server Ad
   Physical Address. . . . . . . . . : 02-BF-C0-A8-DC-AA
   DHCP Enabled. . . . . . . . . . . : No
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 192.168.220.173(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   IPv4 Address. . . . . . . . . . . : 192.168.220.170(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Default Gateway . . . . . . . . . : 192.168.220.1
   DNS Servers . . . . . . . . . . . : 192.168.220.100
                                       192.168.200.10
   NetBIOS over Tcpip. . . . . . . . : Enabled

Hi MS DEF,
A second network adapter is required to provide peer-to-peer communication between cluster hosts. Please isolate your heartbeat network. With unicast when cluster is connected
to a switch, incoming packets are sent to all the ports on the switch, which can cause switch flooding, please confirm you have setup your switch correct, you can refer the following Cisco Switch related unicast configuration.
The Cisco switch unicast related information:
How to configure Microsoft Network Load Balancing on two switches
https://supportforums.cisco.com/discussion/11918276/how-configure-microsoft-network-load-balancing-two-switches
More information:
Selecting the Unicast or Multicast Method of Distributing Incoming Requests
http://technet.microsoft.com/en-us/library/cc782694(v=ws.10).aspx
An Optimal Network Load Balancing (NLB) Configuration
http://blogs.technet.com/b/clint_huffman/archive/2007/10/08/an-optimal-network-load-balancing-nlb-configuration.aspx
Selecting the Unicast or Multicast Method of Distributing Incoming Requests
http://technet.microsoft.com/en-us/library/cc782694(v=ws.10).aspx
I’m glad to be of help to you!
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.

Dual WLAN links with load balancing and failover

Hello,
I am in a scenario where I am in need of two WLAN links between two buildings. There is a distance of 100-150 meters and minimum bandwidth required for both links together is 300Mbit/s. The thing is that both links should use load balancing between them and if one of them goes down, the last one should act as fail over.
I have been looking at Cisco Aironet 1550 Series though I have no idea what is needed to get load balancing and fail over to work, so I am searching here for suggestions on what equipment is needed.
Something like this:
              ---------------WLAN Link 150-300Mbit/s-----------
Building                    Load balancing and fail over               Building
          ---------------WLAN Link 150-300Mbit/s-----------
Thanks in advance!

Several points.
When an AP is doing 300Mbps, that's NOT the real throughput you have. It's the data rate at which traffic is sent.
All in all, if your AP/client are doing 300MBps association, you will see max 150Mbps with a file transfer.
From there, I'm not even sure that 11n supports dual spatial streams over such long distances (you can't have multipath in open air) so afaik the 1550 only do 150Mbps association rate (=dual channel with one spatial stream). That means 75Mbps real speed.
I couldn't test a 1550 yet so don't take my word for official statement but that's what I'm thinking.
the wireless links will always be both up and they can be on different channels.
That will then mean that it will be "as if" the remote switch was connected directly to the central switch (where WLC is connected) as the WLC tunnels traffic all the way. So you could do a spanning-tree config on this one I guess to block the port onthe remote switch.
Regards,
Nicolas

Load balancing and RFC problem

Hi!
I have a problem regarding load balancing and RFC's. We use the follow function in librfc32.dll (from VB6) for RFC calls: RfcOpenExt It's working fine no problem, but from now on we will have to use the this funcion due to load balancing: RfcOpenExtV3
The only difference between the two functions is the parameters. RfcOpenExtV3 has 5 additional parameters:
intLoadBalance1, strLbHost1, strLbSysName1, strLbGroup1, intSapGui1
I asked our tech guys for the details so that I can set up the parameters (double check everything) and the RfcOpenExtV3 doesn't working. Return value is zero.
Have somebody faced with this issue before?
Thanks in advance!

Hi,
1. Probably this link may help.
[http://help.sap.com/saphelp_nw04/helpdata/en/22/042f18488911d189490000e829fbbd/content.htm]
Especially see the function parameters on this page,
which are the bottom.
regards,
amit m.

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.

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 :-)

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

UAG External Load Balancing and ISATAP

Hi Experts,
I am deploying a UAG Array to be used for Direct Access. The Array will consist of two servers and use an F5 External Load Balancer. In addition and in similarity
to 90% of the other corporate intranets out there, the internal network is IPv4 with no IPv6 transition technologies deployed. The article
http://blogs.technet.com/b/edgeaccessblog/archive/2010/05/17/configuring-an-external-load-balanced-uag-directaccess-array-for-an-ipv4-only-network.aspx
isgreat but to my mind has no information to support ‘Manage Out’ and throws up a number of questions: (Note that I want to enable ‘Manage Out’ capability and as far as I am aware that is achieved by using ISATAP)
The article describes that you have to generate and configure your own IPv6 address for the internal interface when using an external load balancer. Does anyone know why? Why not let UAG assign
the addresses as per the default?
UAG by default configures itself as an ISATAP router when there is no IPv6 infrastructure deployed on the internal network
to facilitate ‘manage out’. This still applies when using Windows NLB. Why does this no longer apply when using an external load balancer? I.e. Why does UAG no longer configure itself as a ISATAP router?
In relation to question 2; you therefore need to move your ISATAP router to a different device (http://technet.microsoft.com/en-us/library/ee690463.aspx),
in doing so how do you configure the ISATAP environment to traverse the UAG servers without some sort of load balancing on the internal interfaces? I’m assuming that you can only tell the ISATAP router to use the one default gateway i.e. either one UAG server
or the other. This means that you would have all your outbound internally initiated traffic going via one server only – not very good for performance or fault tolerance.
In relation to question 3; I thought therefore that NLB could be used on the internal interface to solve the above problem, except that I have read that you can’t mix and match external load
balancing and NLB even though they are on separate networks due to bidirectional affinity. What does this actually mean and why does this not occur when load balancing is mixed in this manor?
Therefore when you wish to use external load balancers, do you:
A) Except the fact that you can’t use UAG as a ISATAP router and you do indeed need two devices
and deploy it as described here (http://technet.microsoft.com/en-us/library/ee690463.aspx)
or
B) Except the fact that that you can’t use UAG as a ISATAP router and any internal outbound
traffic travels via the one UAG server only.
Apologies for the long post, but I wanted to make sure that I get my thoughts down concisely so that it may help others who come up with the same questions
J
Thanks for your time everyone
Gary

I am also facing the same issue. I have UAG1 and UAG2, which are in an array, and externally load balanced. I've configured an external ISATAP router according to:
http://www.windowsnetworking.com/articles_tutorials/Configuring-ISATAP-Router-Windows-Server-2008-R2-Part2.html. However, as mentioned by others, the ISATAP router has to have either UAG1 or UAG2 as the next hop for IP-HTTPS traffic. As
a result, communication between the DirectAccess client and management devices will only work if the client is tunneling through the same UAG server that the ISATAP router has as the next hop for the IP-HTTPS prefix. From what I can tell, my configuration
is supported, but I can't figure out how to have the ISATAP router determine which UAG server a client is tunneling through. I thought about having two separate IP-HTTPS prefixes for each UAG server, but this would get overwritten when activating
the DirectAccess configuration. Maybe some type of internal load balancing?

ISA570-Load balancing and Losing packets

I am load balancing two isp's. One isp is fine, but the other I have very high packet loss when pinging the corresponding wan interface from any machine located outside our network. During the packet loss, I cannot https to our firewall from outside our network, but I can rdp using a different address on that same isp and ping another machine located inside our network, it seems only the wan interface is having the issues. Our isp uses icmp to our wan interface and they started noticing the loss the other day, again the other isp loses no packets. I have no issues with clients losing connection from that isp so it looks like it is an issue from outside in only on that wan interface.
I have a spare ISA and that is experiencing no packet loss when using another ip from the problem isp on it's wan interface. The isa's have the same configuration and when I tried moving completely to the backup isa it continued with the same issue. Upgraded to a later firmware, still the same issue. I even took a laptop and put it on our switch that is before the isa and gave it a static public address and I can ping it with no problem from the outside. I can also ping from the laptop to the wan port of the prod isa that is losing packets and it replies as it should, which I assumed would lose packets if it were the isa having issues, but it didn't.
I know this has nothing to do with Cisco security services as on the backup firewall it was still losing packets when we moved the connections over to it.
I can ping from inside my network to the public wan address with no loss when outside machines are having problems.
I can ping the problem wan address from a laptop or from isa(IP = 64.x.x.42) to isa(IP = 64.x.x.45) with no packet loss.
This is a head scratcher and I need some real help here.

Never figured this one out. However, I was able to figure out how this starts. A couple of weeks ago we had an issue with an ISP and we disabled that interface during the day and re-enabled at the end of the day and thats when we noticed ICMP breaks to other ISP.. I don't know why but the ISP we renabled we can ping just fine, but the other one always has issues. The only fix is to enable link failover detection and both WAN interfaces become pingable again.
Now, we use load balancing and one issue we are experiencing is that randomly both WAN interfaces go down and I can confirm this with a ping utility we use off site that pings both WAN interfaces and also each ISP gateway they are connected to. When this happens the ISP's gateways are reachable and neither WAN interface on the ISA are. I am still on .15 version of the firmware, because there were too many issues with newer releases. Is this a known issue?

LRT224 Load Balancing and Link Failover

Hi, I am new to this forum. I have recently set up the LRT224 with two different ISP's. I am having problems configuring the Load Balance and Link Failover.
When I have Load Balance selected only one ISP (WAN 1) is active, the other (WAN2, ISP modem) remains inactive. Why is Load Balance only engaging one ISP?
When I have Link Failover selected, even with attempts and seconds configured to one second, and WAN1 has packets lost, it doesn't switch over to WAN2.
I am not tech savey but any help will be greatly appreciated so that I can get both ISP's active with Load Balance or at least have Link Failover work almost instantly. Thanks.

Hi @BSue2015,
If both WAN1 and WAN2 are already getting IP Addresses from your ISPs then we can say that Load Balance is working. To check it further, do a speed test by going to http://www.speedtest.net. Dual WAN connections are doubling the amount of available full speed connections due to the load balancing. The speed should have its maximum throughput even if you have several users on the network.

Which cluster attribute should you modify to ensure that load balancing and

An EJB is targeted to a cluster. Remote EJB clients can therefore take advantage of WebLogic Server’s load balancing and failover capabilities.
However, a proxy server exists between the clients and cluster, which performs IP address transaction.
Which cluster attribute should you modify to ensure that load balancing and failover work correctly?
A. Multicast Address
B. Persistent Store
C. Cluster Address
D. Migration Basis
E. Replication Channel

http://docs.oracle.com/cd/E13222_01/wls/docs81/config_xml/Cluster.html
Cluster address

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

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