The aim of this exersize is to have the netscaler return different ip addresses according to the health of the gslb services in question in the example above, these are 192. Deployment guide for citrix xendesktop palo alto networks. Currently, the gslb vserver has a domain name bound to it and has a single service bound which happens to be the main content switching virtual server on the netscaler the bound service is the csvips public ip address. Citrix netscaler v traffic management guide, release. Citrix documentation, such as release notes, knowledge center articles, and edocs. Citrix netscaler 11 essentials and networking the objective of the citrix netscaler 11 essentials and networking ourse is to provide the foundational concepts and skills necessary to. Features deep dive global server load balancing gslb november 23, 2016 blog, insights, partner enablement global server load balancing manages traffic across multiple network entry points or data centres. Aug 04, 2017 configure global server load balancing gslb onpremises site a. Deploying citrix netscaler with microsoft exchange 20. Netscaler global server load balancing gslb configuration. Global server load balancing gslb is a mechanism to distribute traffic across multiple serversinstances, typically residing in different.
Netscaler how to configure gslb in active passive mode. As you might have seen on my socials or on the website, i presented a my first actually mycugc webinar last week on thursday, together with dave brett and carsten bruns. I will be posting a complete gslb solution for xenappxendesktops behind a gslb configuration in. Jun 25, 20 in this particular exersizie, i have setup the netscaler as a single gslb site, using a dns proxy setup. As an example, the mpx 5550 is the starting platform that consists of an intel cpu with 8 gb of ram, and. Configure global server load balancing gslb onpremises site a. In source ip persistence, based on ip of user device, persistence is maintained. The master and slave netscaler appliances are running the same netscaler software versions. Gslb vserver then gives out the ip address of one of the gslb services that is bound to it. Gslb in case of wan failure regional namespace there can be a regional namespace model wherein dag is limited to one datacentre only. Features deep dive global server load balancing gslb november 23, 2016 blog, insights, partner enablement global server load balancing.
Configure global server load balancing gslb azure site b. Each is on a different subnet load balancing the same set of storefront servers. I use exchange owa as an example for gslb, i will also not explain how to. The gslb site uses this ip address to communicate with other gslb sites.
Global server load balancing to enhance disaster recovery by transparently redirecting users to alternate data centers in the event of an outage or interruption appexpert rate controls to granularly dedicate. Citrix netscaler make web applications run five times better citrix netscaler is a web application delivery solution that makes applications five times better by accelerating performance, ensuring that applications are always available and protected, and substantially lowering costs. The citrix adc sdx appliance is a multitenant platform on which you can provision and manage multiple virtual citrix adc machines instances. Global server load balancing gslb is a method to split traffic across multiple. This very detailed article from citrix details each of the. The gslb virtual server is the entity that the dns name is bound to. May 03, 2017 advanced netscaler gateway gslb monitoring ive seen a lot of high available netscaler gateway deployments configured with global server load balancing gslb by now. Deploying citrix netscaler with microsoft exchange 20 for gslb 5 figure 2. When using citrix netscaler to present a web accessible service using gslb the netscaler and gslb has the ability to automatically fail over between sites and return the public ip address of the. I will not go into the deep how global server load balancing gslb works and only explain my configuration. Its software based approach offers many benefits to organisations and enterprise including. So each netscaler has a different ip for the access gateway and the storefront url. Citrix adc blx software the citrix adc mpx is a hardwarebased application delivery appliance offering performance ranging from 500 mbs to 200 gbs.
A standard load balancing setup for each server farm or data center. The mpx is a physical appliance of netscaler, which again comes in different models. Netscaler vpx is available in three editions, standard, enterprise and platinum and each edition has specific features enables for use. Citrix netscaler products and versions explained my virtual. Setting up a basic citrix netscaler gslb david vassallos blog. Can anyone please explain the 2 types of dns configuration available for gslb of netscalers. Currently, netscaler is the supported gslb provider in cloudstack. Citrix adc faqs clouddna citrix cloud networking specialists. You must configure the following in the basic gslb setup. The rpc node password for each gslb site ip address is same across all the gslb sites in the gslb configuration.
Downloads citrix application delivery controller firmware, components, sdks, service delivery appliances, service delivery platforms, evaluations and trial software. Information published in edocs states that nsg firmware v11. Global server load balancing to enhance disaster recovery by transparently redirecting users to alternate data centers in the event of an outage or interruption appexpert rate controls to granularly dedicate resources to users, user groups, and specific applications by triggering netscaler policies based either upon load from a requestor or to. The result is that with netscaler, organizations obtain a solution that is easier to deploy and costs less in terms of training, support. Netscaler appliances configured for global server load balancing gslb provide disaster recovery and continuous availability of applications by protecting against points of failure in a wide area network wan.
Citrix and other citrix product names referenced herein are. Advanced netscaler gateway gslb monitoring nerdscaler. A gslb site ip that will be used for netscaler to netscaler communication, which is called mep or metric exchange protocol. Before we get started, lets understand the flow a bit as well as the netscaler services you need.
I also really suggest you read the gslb configuration guide by dave brett, which walks you trough the process of setting up. Gslb functionality works in an activeactive data center environment. Good things to know both netscalers need to run the same software. Getting started with netscaler implementing netscaler vpx. Gslb to a site without a netscaler web server or f5 lb is the same is mainly a matter of not using mep ie the normal ns to ns gslb chat protocol, but instead to use a specific monitor probe. Trying to setup 2 netscalers in an activeactive gslb setup for access gateway and storefront.
Configure netscaler global server load balancing to recover. Mar 17, 2014 i will not go into the deep how global server load balancing gslb works and only explain my configuration. In this view you can see that weve setup gslb to ensure that external internet connected users and devices are being connected to a netscaler gateway vserver in either london or miami, and. Address surges in traffic quickly and costeffectively with ondemand elasticity citrix netscaler payasyougrow licensing. Depending on nature of deployment different goals are targeted, like. Now that citrix released their netscaler appliance on azure we have a huge option to do load balancing within the azure platform.
The monitors are the same monitors you use for lb services, so very powerful. I use exchange owa as an example for gslb, i will also not explain how to setup a virtual server for exchange owa, please have a look at my previous blog post. Currently, the gslb vserver has a domain name bound to it and has a single service bound which happens to be the main content. Cugc webinar building a citrix xenapp disaster recovery. When to use traffic manager, cloud service load balancing or. Gslb is dns based and will flip the resolved address depending on the monitors and site availability. Gslb services for citrix netscaler gateway activepassive setup.
Resilient storefront optimal gateway routing with gslb. It is also important to think about the other options we have. The ip for adns can also be used for mep gslb site. Citrix netscaler gslb management with octoblu and nitro. How to configure gslb setup for internal users from gui. A netscaler appliance installed with netscaler software release 8. Jul 28, 2015 below is a guide on how to set up gslb services for the citrix netscaler gateway.
A gslb site ip that will be used for netscalertonetscaler communication, which is called mep or metric exchange protocol. I want to set up gslb for external users but unable to get my head around the dns bit. Citrix and other citrix product names referenced herein are trademarks. Aug 05, 2019 citrix adc blx software the citrix adc mpx is a hardwarebased application delivery appliance offering performance ranging from 500 mbs to 200 gbs. For a local site, use any ip address that is owned by the appliance for example, a snip or mip address, or the ip address of the adns service. Gslb configuration will be synced automatically to remote gslb sites if enabled. How to synchronize a gslb configuration across sites on a. The flexibility that this gives us also introduces complexity, especially since you configure a service on a citrix netscaler once and changes are rare. All the netscaler appliances participating as sites should have the same netscaler software version the sites are not in a masterslave relationship. Good things to know both netscalers need to run the same software version, for this article this will be build ns12. Citrix netscaler loadbalancing exchange 202016 walkthrough guide if you get the task to load balance exchange with netscaler you will find a lot of whitepapers from citrix with. Check and install a citrix netscaler software update. A netscaler also performs weighted round robin if different weights are assigned to the services.
Configure global server load balancing for xendesktop screenshot description 2 in the create ip dialog add the ip address and netmask o 172. The rpc node password is same across all the gslb sites in the gslb configuration. Each physical network is configured with at least one gslb device 4. Netscaler gslb supports following extended options. However, ive rarely seen any of them being implemented properly in terms of monitoring on the gslb level which resulted in the high availability being compromised in most cases. Global server load balancing gslb netscaler 11 carl. Sorry for the sound quality, this is a basic gslb configuration on a netscaler 9. Two gslb services, one local and the other remote service, or both local services. Please refer to the following citrix edocs article for more information on. Gslb service monitoring is not required for a local service, because the load balancing virtual server status is used. In this particular exersizie, i have setup the netscaler as a single gslb site, using a dns proxy setup.
For more information, see the following knowledge center articles and edocs topics. Better netscaler gslb proximity with edns client subnet ecs. Oct 21, 20 sorry for the sound quality, this is a basic gslb configuration on a netscaler 9. Deploying citrix netscaler with microsoft exchange 20 for. Gslb in case of wan failure regional namespace there can be a regional namespace model wherein dag is limited to one. Refer to the set gslb parameter command for meanings of the arguments. In this architecture, client connects to the closest mailbox server. When you configure gslb on netscaler appliances and enable metric exchange protocol mep, the appliances use the dns infrastructure to connect the client to the data center that best meets the criteria that you set. Citrix netscaler computer hardware, software, technology. We are currently using gslb for a primary site and a dr site. Citrix netscaler is a best in class, award winning layer 4 7 application delivery controller adc. Depending on nature of deployment different goals are targeted. Gslb sites are also the ip address endpoints for netscalers proprietary metric exchange protocol mep, which is used by gslb to transmit. The criteria can designate the least loaded data center, the closest data center, the data center that responds most quickly to.
Deploying citrix netscaler with microsoft exchange 20 for gslb. The citrix netscaler vpx is the only customer configurable device that does true. Jan, 2014 in this view you can see that weve setup gslb to ensure that external internet connected users and devices are being connected to a netscaler gateway vserver in either london or miami, and from there the netscaler and the session profile that communicates with storefront sf1 and 2 in each site is also load balanced using gslb to ensure. Global load balancing with citrix netscaler vpx ibm cloud. Netscaler adc features this should be an easy decision as well, if you need a more technical explanation of these features you can use the netscaler data sheet so far so good one would say so i went to the citrix download site just to get some screenshots from the downloads and theres more netscaler goodness as the netscaler adc, the netscaler gateway, netscaler appfirewall and. Netscaler virtual appliance by using the virsh program managing the netscaler guest vms deploying netscaler vpx instances on aws. I will be posting a complete gslb solution for xenappxendesktops behind a gslb configuration in the near future. Advanced netscaler gateway gslb monitoring ive seen a lot of high available netscaler gateway deployments configured with global server load balancing gslb by now. Below is a guide on how to set up gslb services for the citrix netscaler gateway. When dns queries make it to netscaler, they will be for gateway. Good guide if you are a first timer or even if you are looking to get additional tips. All the netscaler appliances participating as sites should have the same netscaler software versions because the sites are not in a masterslave relationship.
This is done to reduce the crossregion network traffic. Business benefits of the netscaler application delivery. Configure the gslb vserver identically on both appliances. Global server load balancing gslb is an extension of load balancing functionality, which is highly efficient in avoiding downtime.
I have 4 netscalers, 2 in each site with ha and vip for netscaler gateway. The rpc node password for each gslb site ip address is same across all the gslb sites in the gslb. When you configure gslb on netscaler appliances and enable metric exchange protocol mep, the appliances use the dns infrastructure to connect the client to the data center that best. Netscaler adc features this should be an easy decision as well, if you need a more technical explanation of these features you can use the netscaler data sheet so far so good. A dns view is used in global server load balancing gslb to return a predetermined ip address to a specific group of clients, which are identified by using a dns policy. The aim of this exersize is to have the netscaler return different ip addresses according to. Cloudstack2741 gslb gslb service doesnt come up if the. For additional delegations, simply create more cname records. Gslb service monitoring is not required for a local service. Global server load balancing gslb 1 represents set of technologies that is used for business continuance and disaster recovery. The citrix netscaler platform offers a broad set of features and a massive amount of configuration items for each of those features. Citrix netscaler documentation script barry schiffer.
Vpx, licensing, networking, firmware, high availability, management authentication, tcp settings, dns, snmp, syslog, backuprestore, etc. Gslb global server load balancing functional specification. May 27, 2012 setting up gslb on netscaleri found this video on how to set up gslb on the netscalers. The firewall at each site is configured to accept the synchronization and mep connections. For a local site, use any ip address that is owned by the appliance for example, a snip or mip. Global server load balancing gslb is a feature of netscaler that. How to configure gslb activepassive topology on netscaler. Exchange 20, which has multiple advanced features, can be best utilized when used with netscaler for gslb, wherein mails, calendars and contacts are always available for end users. Commonly this is implemented using an onpremises appliance citrix. For the best experience, directaccess can be configured to use a global server load balancing gslb solution to enhance transparent site selection and failover for windows 8. Netscaler gslb solution enables applications to be highly available with geographic proximity along with disaster recovery for enterprise applications like exchange. Setting up gslb on netscaleri found this video on how to set up gslb on the netscalers. On the left, expand traffic management glsb, and click virtual servers. The gslb virtual server is responsible for dnsbased site persistence, and it controls the site persistence for a remote gslb service.
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