Soumya Y Shanthimohan 270004GAQS Visits (1145)
A scenario where, the IBM Rational Performance Tester (RPT) recording showed the message: 'This program cannot display the webpage'.
The script also had the required certificates in place.
Soumya Y Shanthimohan 270004GAQS Visits (1352)
What is an IP alias
IP aliasing is associating more than one IP address to a network interface.
IP aliasing in RPT
By default, when you run a schedule, each virtual user has the same IP address. However, you can make each virtual user appear as though it is running on its own host. To do this, you configure IP aliases on the host computer (RPT workbench), and enable IP aliasing in the schedule. When you run the schedule, the network traffic will appear to be generated by multiple hosts.
To avoid IP conflicts, the IPs have to be legitimate, available within the same subnet, and blocked for distribution.
Configuring IP aliases for a remote Windows location
To make it appear that a virtual user has its own IP address during a schedule run, configure IP aliases for each Windows remote location.
Now, when you run the schedule, it will give the impression that the network traffic is being generated from multiple hosts.
Note: To add multiple IP aliases, use the netsh command, as shown in the following example:
The ntcmds.chm file, typically located in C:\WINDOWS\Help, contains more details about the netsh command. When you are finished with the IP aliases, use the following command to remove them:
You can also use a batch file to add and delete the aliases.
Enabling virtual users to use IP aliases
After you have configured aliases at on remote computers, you set the schedule so that the virtual users can use the configured IP aliases.
To set the schedule so that the virtual users will use the IP aliases during a run:
Assignment of IP addresses for each virtual user in RPT
When IP aliases is enabled, it is expected that each virtual users have unique IP address available in order to emulate unique virtual users. However in some circumstances the number of IP address available may be less than the number of virtual users.
The answer to this is, when the location has IP aliasing enabled, RPT will ask the agent computer how many IP addresses it has available. It is up to you to have already configured the computer with these IP addresses. By default, RPT will use all IPv4 (but not IPv6) address available. You can also restrict the selection to IP addresses on particular interfaces.
If there are more virtual users on the location than there are IP addresses (which would normally be the case), RPT will distribute the virtual users evenly (more or less) across the available IP addresses. For example, if your location has IP addresses 192.22.22.02, 192.22.22.03, and 192.22.22.04 and you ran 10 users on the location, you would have a distribution similar to:
192.22.22.02: Users 1, 4, 7, 10
192.22.22.03: Users 2, 5, 8
192.22.22.04: Users 3, 6, 9
Identifying the originating IP address for each Virtual Tester
By default, when you run multiple Virtual Testers the originating IP address will be the IP address of the system hosting the individual Virtual Tester. However, RPT does have a feature (IP Aliasing) that allows you to assign a specific set of IP addresses per Virtual Tester (See the topic ‘Emulating network traffic from multiple hosts’ in RPT online help). If you have IP aliasing set up, there are two ways to verify the originating IP address.
You can see the IP address that a virtual Tester is using by setting the Test Log level of your schedule to ‘All’ and then checking the Extended Properties of a request in the Test Log after a playback. The originating address of the virtual user will appear as the "Local IP Address".
Alternatively, there is a custom code class outlined in the RPT online help (Extending Rational Performance Tester Functionality -> Custom Code Examples -> Retrieving the IP address of a Virtual user) that you can add to your test/schedule that will obtain the IP address
mquimby 060001FAVB Visits (1396)
There are several videos available for Rational Performance Tester (RPT) that help you troubleshoot possible problems you might encounter with the application. These videos explain the problems, walk you through diagnosis, and demonstrates resolving the problem. Thank you to support engineer Roja Ayyagary for creating the videos, which are available on the IBM Rational Support YouTube channel.
Here is a look at one of the videos on YouTube:
Soumya Y Shanthimohan 270004GAQS Visits (1992)
IBM Rational Performance Tester (RPT) 8.6 onwards, the IBM information center for user assistance is known as IBM Knowledge Center (KC). A KC is a central location for finding and organizing information about IBM products.
Below are the links for the knowledge centers:
Documentation with respect to all the older versions of RPT are also listed as seen above.
Few highlights of KC
1. Narrowing search results by selecting products
If a general search provides too many results, reduce the scope of the search to one or more products. You can also click Add Products... under the search field to add more than one product. Click Done to apply your search scope. Only results from the version, product, or products that you selected are returned. The product you selected is shown on the search bar.
2. Other search tools
To find information more quickly, limit your search results by defining filtering options under Search Results. Only the search results that match your filter selections are returned. In addition to using products, you can filter your search results in the following ways:
Date range : See only topics added or changed in the last week, month, or year, or define your own range of dates.
Tasks : Limit results to specific task types, such as installing, migrating, or troubleshooting. Only documents that are defined as that task type are included in search results. Results might be incomplete if some documents have not been assigned task types.
Operating systems : Limit your search to documents that are relevant for the selected operating system and version.
3. Signing in
To add comments to topics, rate topics, save searches, or create your own collections, sign in to IBM Knowledge Center. Click Sign In in the title bar to open the window where you provide your ibm.com ID and password. Your IBM ID is typically an email address. If you do not have an IBM ID, click Register to apply for one.
4. Adding comments
IBM encourages you to add comments to topics. You are welcome to ask questions, offer suggestions, or provide your own hints for success. However, before you do, please read the IBM Knowledge Center Terms and Conditions. IBM tries to ensure that all content on its sites is respectful of people and laws. We need your cooperation to make that happen.
To add public comments to any topic in IBM Knowledge Center, click the Add Comment link. Provide a title that identifies the problem that you are identifying or the suggestion that you are making. Be aware that after you click Submit, your comment is part of the page for all readers to see. You will not be able to edit or delete the message after it is submitted.
5. Creating your own set of topics with My Collections
Print collection or generate pdf and save the file (only from My collections)
6. Sharing topics
From any topic, click Share, and then select how you want to share a link to the Knowledge Center topic.
7. Viewing content in your own language
By default, IBM Knowledge Center shows content in the language that is specified in the Languages setting for your browser. For example, if your browser is set to French, then you see French content if it exists. If content does not exist in your preferred language, that content is shown in English. You can also set your language preference in IBM Knowledge Center by selecting a language from the language list.
To see which other languages are available for a topic, select the topic and click the language name at the end of the topic.
vjagadeesh 2700063KJN Visits (1545)