Load balancing 2 DNS server

how to configure the CSS to load balance 2 DNS server ?

first configure the services like this :
service dns1
ip address x.x.x.x
active
service dns2
ip address x.x.x.x
active
Then configure the content rule
owner mycompany
content dns
vip address x.x.x.x
add service dns1
add service dns2
active
Then we need to setup something for the dns answer
group dns
vip address x.x.x.x !!!!! same as for the content rule
add service dns1
add service dns2
portmap disable
The portmap disable requires software 5.03(33) or above.
The command is also in 5.01
http://www.cisco.com/en/US/products/hw/contnetw/ps789/prod_release_note09186a00800ba0c6.html

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Load balancing http server

Hi There,
I want to implement a load balancer (linux virtual server) into our htmldb configuration. We currently run the http server on the same machine running oracle/htmldb. I want to split this out and use 2 seperate machines running http server behind the load balancer, both these http servers will be pointing to the same oracle database.
The load balancer will not be using persistent sessions, therefore client requests will be sent evenly to each http server. My main question is, will I have problems with user sessions, or (as I imagine) is all the session information written to the database ?
Thanks in advance.
Tom

Bill,
There are a few things you need to consider
1: Availability of http server. ie how many are you going to have. How are you going to access them. Load balancer, DNS round robin. These should be on different servers to the database.
2: How are the http servers going to connect. For RAC you'll need to specify TNS connections. I'd also recommend that you look at using application partitioning using services in the RAC cluster. That way you can have Apex using a subset of nodes in the cluster .
3: If you are going down the RAC path then I'd assume availability is a priority. You''ll need to think of standby configuration. Again this is possible with TNS configuration.
You can do it all with Apex. RAC and Standby but it will take planning and testing.

Load Balancing DNS requests

I would like to use the CSS to load balance DNS requests for a telnet applicaion. I don't want my telnet sessions to go through the VIP, I want them to go directly to my host. I would like the CSS to run TCP health checks on port 23 and return the best DNS address based on least connections. I know you can do HTTP redirects, but I am not sure how to accomplish this with telnet traffic.
Thanks for the help, sample config would be appreciated.

You could the information in this doc to configure health checks. But I am not too sure about the redirection and load balancing for telnet traffic. May be someone else could help.
http://www.cisco.com/warp/public/117/health_checks.html

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

Load Balancing Reports Server

I am supporting an app server for a Forms & Reports application that uses run_report_object to run reports on a Reports Server. This is on 10gR2 (10.1.2.0.2) on Solaris & Linux.
Currently running multiple standalone Reports Servers on a single server (for 3 different projects). Need to prevent one project from affecting another as much as possible (yes, I know they are on the same box....).
I have a requirement to ensure that a hanging Reports Server doesn't prevent other jobs from running. I see that Reports Server clustering is no longer an option. The Reports documentation about how to implement HA basically say just read the AS docs and figure it out. The problem is that using the AS J2EE HA means that you'd HAVE to use the Reports Servlet. Additionally, I don't see how the reports servlet could be called so that more than one Reports server would be used.
I keep hearing about an impending doc about implementing HA on Reports. When is it coming?
Future environments will be multiple AS installs on separate boxes accessing a RAC DB.
So, what's the scoop? How can I implement this?
So, here are my questions:
1. (Two Servers) I believe I could do this on two servers if I had the same Reports Server name on each. If so, could I have two OC4J containers on each server both with the same mount point for the rwservlet application? What else would I need to do to tell OHS to load balance between both since they have the same name.
2. (Two Servers) If 1 above is okay, would it be possible to have two OC4J containers point to two different standalone Reports Servers?
3. (One Server) Can I start up multiple Reports Servers on same box with the same name (I'm pretty sure this is no :-) )
4. (One Server) Like 2 above except on a single server. Two independent OC4J containers accessing two different servlets. Each has a default Reports Server setup. URL would look the same from each.
I'm kind of graping for straws here on how to move ahead. I'm surprised the Reports Server clustering was taken away, but I suspect it is because the underlying Visibroker architecture was changed and there weren't the resources required to redo this. I'm not sure that is a good thing.
Any help would be appreciated.
:-) Steve

Say you have two servers where you configured Reports, i.e. either in full Enterprise Edition or in AS10g Forms&Reports standalone.
For example:
ServerA.oracle.com with port 7777
ServerB.oracle.com with port 7777
Without using a load balancer you would call a Report with:
http://ServerA.oracle.com:7777/reports/rwservlet?report=test.rdf&userid=scott/tiger@orcl&destype=cache&desformat=htmlcss
http://ServerB.oracle.com:7777/reports/rwservlet?report=test.rdf&userid=scott/tiger@orcl&destype=cache&desformat=htmlcss
Now you put a load balancer in front of them and assign it the virtual name:
reports.oracle.comNow you can call Reports with this URL:
http://reports.oracle.com:7777/reports/rwservlet?report=test.rdf&userid=scott/tiger@orcl&destype=cache&desformat=htmlcss
To make it more interesting you create a specific Reports Server on ServerA called repserver_a and on ServerB: repserver_b. You add them into Enterprise Manager with:
$OH/bin/addNewServerTarget.sh repserver_a (on ServerA and with repserver_b on ServerB). You might need to reload opmnctl and emctl with:
opmnctl reload
emctl reloadIn $OH/reports/conf you add this line at the end (use server=repserver_b on ServerB) :
reporting: userid=scott/tiger@orcl destype=cache desformat=htmlcss server=repserver_a %* You'll call your Reports with this URL:
http://reports.oracle.com:7777/reports/rwservlet?reporting&report=test.rdf
Good luck!
Martin

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.
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Load Balancing FTP Server thru CSM using a single Client IP

Hello,
We have a need to load balance 3 FTP servers. These servers are reached only from a single client IP which is a database server. The FTP method that is being used is currently passive. Our configuration is currently unidirectional, ie, the FTP client (the one database server) sends to the VIP and the FTP Servers then talk directly back to the FTP client and the traffic does not go back through the CSM. The problem is that because FTP negotiates another port to talk on, we have to use sticky so that the connection is sent back to the original FTP server that sent the FTP data port to talk on. But, since we only have a single client IP that is ever used we are not load balancing appropriately across the FTP servers.
Traffic flow goes something like this, tcp port followed after colon as an example
1. FTP Client ----> VIP:21
2. CSM ---------> FTP Server:21
3. FTP Server --------> FTP Client(FTP server says come talk to me on port 1700)
4. FTP Client ---------> VIP:1700
5. CSM ---------> FTP Server:1700
6. FTP Server:1700 ---------> FTP Client
repeat steps 4 thru 6
Here's our hardware and software:
WS-X6066-SLB-APC running 4.2(2)
Config is as follows
module ContentSwitchingModule 9
ft group 101 vlan 9
priority 10
vlan 216 client
ip address 10.209.16.31 255.255.252.0
gateway 10.209.16.1
vlan 20 server
ip address 10.209.0.31 255.255.252.0
alias 10.209.0.11 255.255.252.0
probe ICMP1 icmp
interval 3
failed 3
receive 3
serverfarm FHEPRT
no nat server
no nat client
real 10.209.0.72
inservice
real 10.209.0.73
inservice
real 10.209.0.71
inservice
probe ICMP1
sticky 106 netmask 255.255.255.255 address source timeout 3
policy FHEPRT_POL1
sticky-group 106
serverfarm FHEPRT
vserver FHEPRT1
virtual 10.209.16.71 any
vlan 216
unidirectional
serverfarm FHEPRT
replicate csrp connection
no persistent rebalance
slb-policy FHEPRT_POL1
inservice

You are missing "service ftp" config in the Vip definition. Try the following
vserver FHEPRT1
virtual 10.209.16.71 tcp ftp service ftp
Syed Iftekhar Ahmed

Using Web Cache to Load balance Forms Server application.

Hello,
I apologize for cross posting this question in the Forms and Caching Services forum. But I thought my question will have a better chance.
I have read that it's possible to use Oracle Web Cache as a software load balancer between multiple Application Servers.
We are running Oracle9iAS R1.0.2.2.2a, with Forms/Reports6i servers on 2 Win2k boxes i.e our Forms6i application is deployed on two seperate boxes in two distinct locations. Users at each location, use their respective App Server url.
Since the application is the same i.e. Forms6i code/fmx is the same for both locations, I am looking into loadbalancing and failover capability that Web Cache might be able to provide.
I AM ONLY LOOKING AT THE LOADBALANCING & FAILOVER capabilities and NOT caching.
So basically all users from both locations will point their browser to this Web Cache and the Web Cache will direct each connection to either of the two boxes. So, if either of the boxes dies, Web Cache will divert the requests to the other box.
My concern is whether Web Cache supports this for the Forms requests that it will receive from the users. We are using Servlet Deployment of Forms, so technically, all communication is going though the HTTPD.
Has anyone done this or has any ideas as to whether it's going to work or not? Oracle's FAQ insists that Forms is not supported. But I want to make sure that even loadbalancing is not supported. And if not supported then is there any other solution.
Any comments appreciated.
Thanks,
Manish

Using Web Cache to load balance servlet-based Forms (6i and 9i) is unofficially supported. I say "unofficially" because we have actual customers doing it and getting support, but the 2 development teams (Forms and Web Cache) haven't actually done any integration testing of this sort of configuration yet. For your case, please contact your Support rep and ask what was done to use Web Cache as a load balancer for Forms6i at METRO in Germany. The Forms product managemment team is writing up a white paper to describe how to do it, but until then, you'll need to go through Support. Please contact me if you want more information.

Help: AM Agent working with load balancing AM Server

Hi,
We are trying to set up the policy agent to work with two AM Servers behind a load balancer.
The agent deployment document said that in the AMAgent.properties we must set
com.sun.am.loadBalancer_enable=true
According to the AM deployment guide(http://docs.sun.com/source/817-7644/appE_loadbalancerconfig.html),
we also set in the AMConfig.properties something like
com.iplanet.am.lbcookie.name=server1
com.iplanet.am.lbcookie.value=server1
The loading balancing just does not work. Can anyone explain how AM agent works under such an deployment
environment? Some people say the agent can find the real server using the naming service, but the not
much explanation can be found.
More info on our two machines:
The two AM servers are named server1.domain and server2.domain. The virtual LB name is server.domain.
The two AM servers were installed using the host name server.domain. We added the servers' real name
in the AM's fqdnMap. At the agent config file, the name service is pointing to the LB.
Really appreciated any advices.
Regards,
Henry

Thanks for your reply.
We figured it out lately thanks to help from Bernhard.
1) use each machine's name to install the AM servers using the same LDAP server.
2) In AmAgent.propeties, set com.sun.am.loadBalancer_enable=true
3) In AM server platform, add in all machine's names
4) In Organization alias, add in two machines' name
5) In fqdnMap, add in load balancer's name
6) In LB, set cookie stickiness based on cookie JSESSIONID

Timesheet Update Issue-- After Load Balancing of server

Hi Recently we have applied Load balancing to our production and development server, but we are getting error while trying to save and submit timesheet for resource . The jobs are failing and blocking the Queue
This is the error message
General
Queue:
GeneralQueueJobFailed (26000) - TimesheetUpdate.UpdateTimesheetMessage. Details: id='26000' name='GeneralQueueJobFailed' uid='187a8888-6c29-4c92-a39e-4b9999096259' JobUID='6c18188f-c49f-4e10-9f18-00e393ac4820' ComputerName='MUCPMOF1'
GroupType='TimesheetUpdate' MessageType='UpdateTimesheetMessage' MessageId='1' Stage=''. For more details, check the ULS logs on machine " XXXXXXXXXX " for entries with JobUID
6c18188f-c49f-4e10-9f18-00e393ac4820.
This is due to Load balancing , as when we undo the load balancing there are no issue with timesheet updates .anyone has any idea ????Regards

Hi Priyanshu,
Did you solved the load balancing issue ? We are interested by your answer, we are on the verge to implement Project Server (2013) on a load balancing SharePoint Farm, and we wonder if it is supported (we found no document to prove it, esp for reporting
or timesheet). We have heard rumours that says it does not work on reporting.
Regards
www.e-labor.net
Didier Maignan | http://didiermaignan.unblog.fr

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

Network load balancing SQL Server 2012

Hi all,
Out of pure curiosity, would the following scenario to load balance work:
* Create an NLB of 2 nodes
* On each node, install sql server, in my case 2012 std
* Create a merge replication which manages identity columns between the 2 servers. One node is the publisher the other one the subscriber
If I were to implement this, what would be the risks ?
Thanks
Olivier

SQL Server does not support load balancing.
Yes you can do what you describe. You need to use "sticky sessions" to make sure users always get the same server, which kind of defeats the purpose of load balancing.
I would suggest looking into an AlwaysOn availably group cluster instead. Not the same thing, but built in and you can redirect read only users to use a replica.
https://msdn.microsoft.com/en-us/library/ff877884.aspx

Load balancing Exchange Server 2013 in coexistence

I am trying to load balance our Exchange 2013 CU7 environment with Citrix Netscaler. I am trying to start the process to migrate our users from 2010 SP3 to 2013 CU7. Every once in a while I experience a looped login when trying to login to OWA. You enter
your username and password and it loops right back to the login page... stopping you from ever logging in.
This made me think it was something with session affinity on the load balancer... however I thought they didn't need that anymore. So I'm wondering if since i'm in coexistence with 2010 it still is required.
I have no users on 2013 yet so all my test accounts are on 2010.
My environment:
3x Exchange 2013 CU7 CAS/MBX combined
3x Exchange 2010 CAS
3x Exchange 2010 MBX
2x Citrix Netscaler 10.5 VPX
Does anyone know the proper way to configure this? Information on Netscaler for this would be great but it doesn't have to be related to Netscaler. I'm just looking for the proper session affinity values for Exchange 2013 with 2010 coexistence.

Hello. Perhaps you have problems in the CAS Exchange.
Suggest that the test plan.
1. Check the operation through
Troubleshooting Exchange Server 2013 with Test Cmdlets
Get-webservicesvirtualdirectory
Get-oabvirtualdirectory
Get-owavirtualdirectory
Get-ecpvirtualdirectory
Get-ActiveSyncVirtualDirectory
Get-AutodiscoverVirtualDirectory
Test-ServiceHealth
Test-MapiConnectivity
Test-OutlookConnectivity
Test-OutlookWebServices
Test-WebServicesConnectivity
Test-EcpConnectivity
Test-ActiveSyncConnectivity
Test-PowerShellConnectivity
2. In turn one of the output of the CAS and balancing on a test machine, through HOST file list the test CAS. If all CAS correct answer, then check Netstsaler.
MCITP, MCSE. Regards, Oleg

Load balancing Application Server

Hi
I am new to peoplesoft dba
It would be great if somebody could point me to the steps required for setting up loadbalancing for Peoplesoft application server (not web server)
In particular i wanted to know where to look for information on 'directing certain loads' to particular server.
Thanks a lot
Cyril

Are you talking about load balancing from Webserver to multiple appserver in 4tier mode ? See here the configuration.properties conf :
http://download.oracle.com/docs/cd/E13292_01/pt849pbr0/eng/psbooks/tsvt/book.htm?File=tsvt/htm/tsvt14.htm#H4003
Or are you talking about load balancing for 3tier mode ? See TUXEDO Connect String* in the profile (configuration manager) :
http://download.oracle.com/docs/cd/E13292_01/pt849pbr0/eng/psbooks/tsvt/book.htm?File=tsvt/htm/tsvt11.htm#H4032
Nicolas.

CSM - Load balance using Server CPU

Hi
I have a customer who requires the load-balancing prediction
algorithm to be based on the CPU level of the Server. So the server with the least CPU is chosen at the laod-balancing stage.
Is there a way to do this?
Thanks James

Hi James
With CSM the only option is DFP (Dynamic feed back protocol). If your application vendor provides DFP agents (which is very unlikely) for the application then these agents can be installed on App servers for the desired purpose.
Config details at
http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/csm/4.2.x/configuration/guide/rsfarms.html#wp1039774')">http://www.cisco.com/en/US/docs/interfaces_modules/services_modules/csm/4.2.x/configuration/guide/rsfarms.html#wp1039774
With ACE you can use SNMP based probes to achieve what you are looking for.
Syed Iftekhar Ahmed

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I have developed a Client/Server messaging application in Java. I want to balance the load of Client who login to application into 5 machines.
Any suggestions/support links?

Is the application working ?
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What are you using as the server machine/software ?
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