NetScaler Application Delivery Software 6.0: Load Balancing

Technotes Created Modified Read Rating
HTTP-ECV Monitor Probes Are Failing
Summary This document describes how to troubleshoot monitor of type HTTP-ECV. In this case, HTTP-ECV monitor probes sent by the NetScaler to the server are failing, even though the web page c...
CTX110167
8/30/06 10/15/08 5,584 55555
Description of the Redirect URL Feature
Summary This document describes the redirect URL option that may be applied to virtual servers (vservers) on the NetScaler. Background A virtual server of type HTTP or HTTPS may be configured...
CTX108946
4/7/06 10/13/08 9,955 55555
Access to the Web Servers is not Available through the NetScaler Appliance
Symptoms You are not able to access the Web servers through the NetScaler appliance virtual servers (vservers) even though the vservers and services are running in the UP state. The vservers ...
CTX116878
4/17/08 8/8/08 779 Unrated
Case Study - Bookmarks on the NetScaler Appliance do not Work
Problem Definition A customer wanted to design a network topology that has two pairs of NetScaler appliances. The frontend NetScaler appliance pair has VPN configured on it and has a few book...
CTX117285
8/7/08 8/7/08 293 Unrated
Removing Idle Connections from a NetScaler Appliance
Summary This document contains information about removing the idle connections from a NetScaler appliance. Idle Connections At times, a user connected to the site might not disconnect after a...
CTX117948
8/4/08 8/5/08 429 Unrated
Case Study: The Primary NetScaler Appliance Cannot Detect a Replacement NetScaler Appliance to Create a High Availability Pair
Problem Definition The customer had originally connected a pair of NetScaler appliances with high availability. One of the appliances became defective and was replaced. When the customer conn...
CTX117292
6/24/08 6/24/08 498 55555
NetScaler Sessions Fail to Close
Symptoms You attempt to open a session to a Content Switching Virtual Server (vserver), but no request arrives. The Web browser on the client computer tries to connect for more than 20 minute...
CTX111504
5/28/08 5/28/08 464 Unrated
The DNS Server Fails to Resolve Domain Requests
Symptoms If the Domain Name System (DNS) server is not available, users cannot resolve domain requests. However, if you restart the switch and the DNS server, the issue is resolved. Cause Inv...
CTX116877
5/12/08 5/12/08 582 Unrated
How to Change the Mapped IP, NetScaler IP, and Routes Without Affecting the Production Traffic on a NetScaler High Availability Pair
summary This article describes how to change the Mapped IP (MIP), NetScaler IP (NSIP), and routes without affecting the production traffic on a NetScaler High Availability (HA) Pair. Because ...
CTX116835
5/9/08 5/9/08 1,005 Unrated
Configuring SSL with Backend Encryption on the NetScaler Appliance Causes Delay in Response
Symptoms In addition to the SSL offloading, when the NetScaler appliance encrypts the backend traffic to the server, the “Page cannot be displayed” message is displayed intermittently if the ...
CTX116874
5/9/08 5/9/08 648 Unrated
Virtual ID Conflict is Observed on the NetScaler High Availability Pair
Symptoms The console of the NetScaler appliance High Availability Pair displays an error message stating a conflict for the virtual ID (VRID). Cause You might have connected both the NetScale...
CTX116876
5/9/08 5/9/08 531 Unrated
How to Retrieve the Current Configuration after Upgrading the NetScaler Software on a High Availability Pair
Summary This article describes how to retrieve the current configuration after upgrading the NetScaler Software on a High Availability Pair. When you make any changes to the configuration of ...
CTX116837
5/9/08 5/9/08 555 55555
How to Enable TCP Traffic on a High Availability Pair after Upgrading it to the Latest Release of NetScaler Software
Summary This article describes how to enable TCP traffic on a High Availability pair after upgrading it to the latest release of NetScaler software. Consider the following scenario: A high av...
CTX116836
5/9/08 5/9/08 507 Unrated
How to Configure Outbound Link Load Balancing for Two ISP Links on a NetScaler Appliance with Reverse Network Address Translation
Summary This article describes how to configure Outbound Link Load Balancing for Two ISP Links on a NetScaler Appliance with Reverse Network Address Translation (RNAT) You apply the Link Load...
CTX116995
5/8/08 5/8/08 776 4444
The CPU Usage Reaches 100% and the Connections are Terminated on a NetScaler High Availability Pair
Symptom When you perform SSL offloading on NetScaler software release 6.1 on a high availability pair of NS9950 NetScaler appliances, the CPU usage reaches 100% and all the connections are te...
CTX116875
5/8/08 5/8/08 547 Unrated
If Multiple Monitors are Bound to a Service, do All of the Monitors Have to Fail for the Service to be Disabled?
Q: If multiple monitors are bound to a service, do all of the monitors have to fail for the service to be disabled? A: No. It only takes one monitor to fail for a service to be disabled. In NetS...
CTX109851
7/3/06 11/21/06 5,100 Unrated
How to Configure Direct Server Return
Summary This article describes how to configure Direct Server Return (DSR). Background The concept behind DSR is that the traffic is sourced through the NetScaler, however, the return traffic from...
CTX110501
11/14/06 11/14/06 7,628 55555
How to Host Multiple SSL Sites on NetScaler
Summary This document describes the available options for hosting multiple SSL sites on the NetScaler. Background It is not possible to host multiple SSL sites on a single NetScaler Virtual IP (VI...
CTX110750
10/25/06 10/26/06 10,525 55555
How to Host Multiple Web Sites on a Single HTTP VIP
Summary This document describes how to host multiple HTTP sites using a single NetScaler Virtual IP (VIP). Requirements This procedure requires the use of the Load Balancing and Content Switching ...
CTX110749
10/25/06 10/26/06 6,938 Unrated
What Causes a NetScaler to Load Balance Traffic Unevenly when Configured with SOURCEIP-based Persistence?
Q: What causes a NetScaler to load balance traffic unevenly when configured with SOURCEIP-based persistence? A: Uneven load balancing may occur for two basic reasons: 1. The configured load balanc...
CTX109895
7/26/06 7/26/06 1,118 Unrated
How do You Extract the Client IP Header for Logging on the Web Server?
Q: How do you extract the client IP header for logging on the web server? A: Under Apache 2.x, you can edit the CustomLog format to include %{Client-IP}i to replace the %a (remote IP) or %h (remot...
CTX109730
7/26/06 7/26/06 5,861 Unrated
How do you Transfer an SSL Certificate and Key from Netscape 3.6/iPlanet 4.1 to a NetScaler ?
Q: How do you transfer an SSL certificate and key from Netscape 3.6/iPlanet 4.1 to a NetScaler ? A: Keys and certificates are stored on the server in a database format. They are stor...
CTX109875
7/14/06 7/17/06 11,202 1
What Types of Persistence does the NetScaler System Support?
Q: What types of persistence does the NetScaler system support? A: Cookie insert persistence : When this persistence type is used, the NetScaler inserts information about where or which serve...
CTX109878
7/13/06 7/13/06 6,032 4444
Why Do You Get an "Operation not permitted" Error Message When You Try to Set the Load Balancing Method to leastRESPONSETIME for a TCP-based "lb vserver"?
Q: Why do you get an “Operation not permitted” error message when you try to set the Load Balancing method to leastRESPONSETIME for a TCP-based “lb vserver”? A: For the leastRESPONSETIME metho...
CTX109877
7/11/06 7/11/06 4,332 Unrated
Does the NetScaler System Provide a Slow Start if a Service is Re-enabled After a Previous Service Disabling?
Q: Does the NetScaler system provide a slow start if a service is re-enabled after a previous service disabling? A: It does if the Load Balancing method is one of the following: Least Conn...
CTX109871
7/10/06 7/10/06 4,435 Unrated
How Does the Global Setting for Use Source IP Address (USIP) Interact with the Individual Service USIP Settings?
Q: How does the global setting for Use Source IP address (USIP) interact with the individual service USIP settings? A: When USIP mode is enabled globally, two things happen: All automaticall...
CTX109858
7/3/06 7/3/06 6,310 Unrated
When Purchasing Certificates for the NetScaler from the SSL Certificate Vendor Web Site, What Web Server Type Should You Specify?
Q: When purchasing certificates for the NetScaler from the SSL certificate vendor Web site, what Web server type should you specify? A: When requesting a certificate from a vendor that will be ...
CTX109854
7/3/06 7/3/06 5,654 Unrated
Why does NetScaler Need FRONT_END_HTTPS for Microsoft Outlook Web Access/Exchange Server?
Q. Why does NetScaler require FRONT_END_HTTPS for Microsoft Outlook Web Access/Exchange Server? A: Microsoft Exchange Server installs two components – a front-end and back-end server – for Outloo...
CTX109881
6/12/06 6/28/06 6,160 Unrated
Is TCP Fast Ramp RFC compliant?
Q: Is TCP Fast Ramp RFC compliant? A: No. Version 6.x of the NetScaler system has this feature disabled by default. It can be re-enabled as needed.
CTX109745
6/22/06 6/23/06 4,565 55555
What is a Mapped IP Address?
Q: What is a Mapped IP address (MIP)? A: A MIP is a Mapped Internet Protocol address in the NetScaler system. Request switching intercepts an incoming client’s IP and replaces it with a ...
CTX109747
6/22/06 6/22/06 10,459 4444
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