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Nagaraj Harikar

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Posts posted by Nagaraj Harikar

    Windows Printing using GSLB

    in Core ADC use cases

    Posted

    Hi Maxim,

    Can you help provide more details on the usecase, also share the deployment topology.  

    • Current Issues: Are you experiencing any specific problems currently?
    • High Availability Goals: In the event of a server failure, how quickly do you need printing to resume operations?
    • Preferences: Is session persistence a critical factor?
    • Number of Print Servers: Currently, how many print servers do you have in your environment?
    • Server Distribution: Do these servers reside in separate data centers, or are they all located centrally? Does each server represent a datacenter? 

    Hello, I need to provide a generic presentation on GSLB using ADC for an active -active datacenter topology. Where I can find slides on this topic? Thanks.

    in Core ADC use cases

    Posted

    Here is a simple example of how to configure NetScaler GSLB for an active-active data center topology:

    1. Let's assume you have two data centers, DC1 and DC2, each hosting the same web application.
    2. On DC1, create a NetScaler VIP address with IP address 10.0.0.1 and configure a GSLB site with name "DC1".
    3. On DC2, create a NetScaler VIP address with IP address 10.0.0.2 and configure a GSLB site with name "DC2".
    4. Create a GSLB service with name "web-app" and associate the VIP addresses from DC1 and DC2 to the service.
    5. Configure a health monitor to monitor the health of the backend servers hosting the web application.
    6. Configure a load balancing method, such as round robin, to distribute traffic between the backend servers.
    7. Create a DNS zone for the web application and delegate the zone to the NetScaler GSLB.
    8. Publish the web application using a fully qualified domain name (FQDN) such as "www.my-app.com" and configure clients to use the FQDN to access the application.

    NetScaler provides a wizard to help you configure GSLB in a graphical user interface. The wizard guides you through the steps to create a GSLB deployment and provides options to customize the deployment to meet your specific needs. The wizard makes it easier to configure a GSLB deployment, especially for those who are new to NetScaler or who are not familiar with the command line interface. To access the wizard, log into the NetScaler web-based management interface and navigate to the GSLB section. From there, you can launch the wizard and follow the steps to create a new GSLB deployment.

    More Details here:

    https://support.citrix.com/article/CTX223376/how-to-configure-gslb-activeactive-topology-on-netscaler-using-the-new-gslb-wizard

    How to convert MaxMind GeoLite2 database format to Citrix ADC database format?

    in Core ADC use cases

    Posted

    1. Download the GeoLite2 City or GeoLite2 Country database in .csv format from https://dev.maxmind.com/geoip/geoip2/geolite2/.
    2. Copy the file in a Citrix ADC directory (say /var). Unzip the file using the following shell command, which would create a directory with the same name.
    3. tar -xf <filename>
    4. Download the script Convert_GeoIPDB_To_Netscaler_Format.pl from https://github.com/citrix/MaxMind-GeoIP-Database-Conversion-Citrix-ADC-Format and copy it to the directory created in step #2.
    5. To check the acceptable options for the script execution, run the following command:
    6. perl Convert_GeoIPDB_To_Netscaler_Format.pl –help
    7. Various options available are:
    • <filename>
      •  IPv4 output file. Default output file name: Netscaler_Maxmind_GeoIP_DB_IPv4.csv
    • -p <filename>
      •  IPv6 output file. Default output file name: Netscaler_Maxmind_GeoIP_DB_IPv6.csv
    • -logfile <filename>
      •  File containing list of events/messages
    • -debug
      •  Prints all the messages to STDOUT
    1. Run the following command to convert the GeoLite2 database format to Citrix ADC database format.
    2. perl Convert_GeoIPDB_To_Netscaler_Format.pl

    Example:

    perl Convert_GeoIPDB_To_Netscaler_Format.pl -b GeoLite2-Country-Blocks-IPv4.csv -i GeoLite2-Country-Blocks-IPv6.csv -l GeoLite2-Country-Locations-en.csv

    How to increase the disk space of an existing partition on NetScaler ADC VPX?

    in Core ADC use cases

    Posted

    Yes. From Citrix ADC release 13.1 build 21.x onwards, you have the option to increase disk space on the Citrix ADC VPX instance by adding a second disk. This feature is supported on all VPX form factors. You must add the second disk during the first boot of the Citrix ADC appliance or next when the appliance is shut down. The second disk is used for storing core files and logging. Existing directories that are used to store core files and log files continue to work as earlier.

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