Getting Started with Citrix ADC
Deploy a Citrix ADC VPX instance
Optimize Citrix ADC VPX performance on VMware ESX, Linux KVM, and Citrix Hypervisors
Apply Citrix ADC VPX configurations at the first boot of the Citrix ADC appliance in cloud
Install a Citrix ADC VPX instance on Microsoft Hyper-V servers
Install a Citrix ADC VPX instance on Linux-KVM platform
Prerequisites for Installing Citrix ADC VPX Virtual Appliances on Linux-KVM Platform
Provisioning the Citrix ADC Virtual Appliance by using OpenStack
Provisioning the Citrix ADC Virtual Appliance by using the Virtual Machine Manager
Configuring Citrix ADC Virtual Appliances to Use SR-IOV Network Interface
Configuring Citrix ADC Virtual Appliances to use PCI Passthrough Network Interface
Provisioning the Citrix ADC Virtual Appliance by using the virsh Program
Provisioning the Citrix ADC Virtual Appliance with SR-IOV, on OpenStack
Configuring a Citrix ADC VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
Deploy a Citrix ADC VPX instance on Microsoft Azure
Network architecture for Citrix ADC VPX instances on Microsoft Azure
Configure multiple IP addresses for a Citrix ADC VPX standalone instance
Configure a high-availability setup with multiple IP addresses and NICs
Configure a high-availability setup with multiple IP addresses and NICs by using PowerShell commands
Configure a Citrix ADC VPX instance to use Azure accelerated networking
Configure HA-INC nodes by using the Citrix high availability template with Azure ILB
Configure a high-availability setup with Azure external and internal load balancers simultaneously
Configure address pools (IIP) for a Citrix Gateway appliance
Upgrade and downgrade a Citrix ADC appliance
Solutions for Telecom Service Providers
Load Balance Control-Plane Traffic that is based on Diameter, SIP, and SMPP Protocols
Provide Subscriber Load Distribution Using GSLB Across Core-Networks of a Telecom Service Provider
Authentication, authorization, and auditing application traffic
Basic components of authentication, authorization, and auditing configuration
On-premises Citrix Gateway as an identity provider to Citrix Cloud
Authentication, authorization, and auditing configuration for commonly used protocols
Troubleshoot authentication and authorization related issues
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Persistence and persistent connections
MQTT load balancing
Advanced load balancing settings
Gradually stepping up the load on a new service with virtual server–level slow start
Protect applications on protected servers against traffic surges
Retrieve location details from user IP address using geolocation database
Use source IP address of the client when connecting to the server
Use client source IP address for backend communication in a v4-v6 load balancing configuration
Set a limit on number of requests per connection to the server
Configure automatic state transition based on percentage health of bound services
Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
Use case 3: Configure load balancing in direct server return mode
Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
Use case 7: Configure load balancing in DSR mode by using IP Over IP
Use case 10: Load balancing of intrusion detection system servers
Use case 11: Isolating network traffic using listen policies
Use case 12: Configure Citrix Virtual Desktops for load balancing
Use case 13: Configure Citrix Virtual Apps for load balancing
Use case 14: ShareFile wizard for load balancing Citrix ShareFile
Use case 15: Configure layer 4 load balancing on the Citrix ADC appliance
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Authentication and authorization for System Users
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Configuring a CloudBridge Connector Tunnel between two Datacenters
Configuring CloudBridge Connector between Datacenter and AWS Cloud
Configuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
Configuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
Configuring a CloudBridge Connector Tunnel Between a Citrix ADC Appliance and Cisco IOS Device
中心思想dBridge Connector Tunnel Diagnostics and Troubleshooting
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MQTT load balancing
The Message Queuing Telemetry Transport (MQTT) is an OASIS standard messaging protocol for the Internet of Things (IoT). MQTT is a flexible and easy-to-use technology that provides effective communication within an IoT system. MQTT is a broker-based protocol and is widely used to facilitate the exchange of messages between clients and broker.
The following key benefits of MQTT make it a well-suited option for your IoT device:
- Reliability
- Fast response time
- Capability to support unlimited devices
- Publish/subscribe messaging that is perfect for many-to-many communication
IoT is the network of interconnected devices that are embedded with sensors, software, network connectivity, and necessary electronics. The embedded components enable IoT devices to collect and exchange data. The increase in use of IoT devices brings in multiple challenges for network infrastructure, with Scale being the prominent one. In a large scale deployment of IoT devices, the data generated by each IoT device needs to be analyzed swiftly. To achieve the scale requirement and efficient usage of resources, the load on the broker pool must be distributed evenly. With the support of the MQTT protocol, you can use the Citrix ADC appliance in IoT deployments to load balance the MQTT traffic.
The following figure depicts the MQTT architecture using a Citrix ADC appliance to load balance the MQTT traffic.
An IoT deployment with MQTT protocol has the following components:
- MQTT broker.A server that receives all messages from the clients and then routes the messages to the appropriate destination clients. The broker is responsible for receiving all messages, filtering the messages, determining who is subscribed to each message, and sending the message to these subscribed clients. The broker is the central hub through which every message must pass.
- MQTT client.Any device, from a micro controller up to a full-fledged server, which runs an MQTT library and connects to an MQTT broker over a network. Both publishers and subscribers are MQTT clients. The publisher and subscriber labels refer to whether the client is publishing messages or subscribed to receive messages.
- MQTT load balancer.The Citrix ADC appliance is configured with an MQTT load balancing virtual server to load balance MQTT traffic.
In a typical IoT deployment, the broker (cluster of servers) manages the group of IoT devices (IoT clients). The Citrix ADC appliance load balances the MQTT traffic to the brokers based on various parameters, such as Client ID, topic, and user name.
Configure load balancing for MQTT traffic
For the Citrix ADC appliance to load balance MQTT traffic, perform the following configuration tasks:
- Configure MQTT/MQTT_TLS services or service groups.
- Configure MQTT/MQTT_TLS load balancing virtual server.
- Bind the MQTT/MQTT_TLS services to the MQTT/MQTT_TLS load balancing virtual server.
- Configure MQTT/MQTT_TLS content switching virtual server.
- Configure a content switching action that specifies the target load balancing virtual server
- Configure a content switching policy.
- Bind the content switching policy to a content switching virtual server that is already configured to redirect to the specific load balancing virtual server.
- Save the configuration.
To configure load balancing for MQTT traffic by using the CLI
Configure MQTT/MQTT_TLS services or service groups.
add service add servicegroup bind servicegroup
Example:
add service srvc1 10.106.163.3 MQTT 1883 add servicegroup srvcg1 MQTT bind servicegroup srvcg1 10.106.163.3 1883
Configure MQTT/MQTT_TLS load balancing virtual server.
add lb vserver
Example:
add lb vserver lb1 MQTT 10.106.163.9 1883
Bind the MQTT/MQTT_TLS services or service groups to the MQTT load balancing virtual server.
bind lb vserver bind lb vserver
Example:
bind lb vserver lb1 srvc1 bind lb vserver lb1 srvcg1
Configure MQTT/MQTT_TLS content switching virtual server.
add cs vserver
Example:
add cs vserver cs1 MQTT 10.106.163.13 1883
Configure a content switching action that specifies the target load balancing virtual server.
add cs action -targetLBVserver [-comment ]
Example:
add cs action act1 -targetlbvserver lbv1
Configure a content switching policy.
add cs policy [-url | -rule ] –action
Example:
add cs policy cspol1 -rule “MQTT.COMMAND.EQ(CONNECT) && MQTT.CONNECT.FLAGS.QOS.eq(2)” -action act1
Bind the content switching policy to a content switching virtual server that is already configured to redirect to the specific load balancing virtual server.
bind cs vserver -policyName -priority
Example:
bind cs vserver cs1 –policyName cspol1 -priority 20
Save the configuration.
save ns config
To configure load balancing for MQTT traffic by using the GUI
- Navigate toTraffic Management>Load Balancing>Virtual Servers, and create a load balancing virtual server of typeMQTTorMQTT_TLS.
- Create a service or service group of type MQTT.
- Bind the service to the MQTT virtual server.
- ClickSave.
MQTT message length limit
The Citrix ADC appliance treats the messages with message length greater than 65536 bytes as jumbo packets, and discard them by default. Thedropmqttjumbomessage
lb parameter decides whether to process the jumbo packets or not. This parameter is by default set toYES, which implies that the jumbo MQTT packets are dropped by default. If this parameter is set toNO, the ADC appliance handles even the packets with message length greater than 65536 bytes.
To configure the ADC appliance to handle jumbo packets by using CLI:
Set lb parameter –dropMqttJumboMessage [YES | NO]
Example:
set lb parameter –dropMqttJumboMessage no
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