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Getting Started with Citrix NetScaler
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Deploy a Citrix NetScaler VPX instance
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Install a Citrix NetScaler VPX instance on Microsoft Hyper-V servers
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Install a NetScaler VPX instance on Linux-KVM platform
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Prerequisites for Installing NetScaler VPX Virtual Appliances on Linux-KVM Platform
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Provisioning the NetScaler Virtual Appliance by using OpenStack
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Provisioning the NetScaler Virtual Appliance by using the Virtual Machine Manager
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Configuring NetScaler Virtual Appliances to Use SR-IOV Network Interface
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Configuring NetScaler Virtual Appliances to use PCI Passthrough Network Interface
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Provisioning the NetScaler Virtual Appliance by using the virsh Program
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Deploying NetScaler VPX Instances on AWS
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Upgrade and downgrade a NetScaler appliance
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SNMP support for admin partitions
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Overriding Static Proximity Behavior by Configuring Preferred Locations
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Example of a Complete Parent-Child Configuration Using the Metrics Exchange Protocol
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Configuring Global Server Load Balancing for DNS Queries with NAPTR records
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Using the EDNS0 Client Subnet Option for Global Server Load Balancing
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Persistence and persistent connections
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Advanced load balancing settings
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Gradually stepping up the load on a new service with virtual server–level slow start
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Protect applications on protected servers against traffic surges
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Use source IP address of the client when connecting to the server
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Set a limit on number of requests per connection to the server
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Configure automatic state transition based on percentage health of bound services
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Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
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Use case 3: Configure load balancing in direct server return mode
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Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
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Use case 7: Configure load balancing in DSR mode by using IP Over IP
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Use case 10: Load balancing of intrusion detection system servers
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Use case 11: Isolating network traffic using listen policies
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Use case 14: ShareFile wizard for load balancing Citrix ShareFile
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Configuring a CloudBridge Connector Tunnel between two Datacenters
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Configuring CloudBridge Connector between Datacenter and AWS Cloud
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Configuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
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Configuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
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Configuring a CloudBridge Connector Tunnel Between a NetScaler Appliance and Cisco IOS Device
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CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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SNMP support for admin partitions
A partitioned NetScaler appliance uses SNMP infrastructure for partition rate limiting and for monitoring partition resource utilization details.
SNMP traps for admin partition rate limiting
On a partitioned NetScaler appliance, a PARTITION-RATE-LIMIT alarm can generate nine SNMP traps for notifying a partition resource (such as bandwidth, connection, or memory) has reached its limit or returned to normal.
The following nine SNMP traps are generated when:
- partitionCONNThresholdReached. The number of active connections for a partition exceeds its high threshold percentage.
- partitionCONNThresholdNormal. The number of active connections is less than or equal to the normal threshold percentage.
- partitionBWThresholdReached. The partition’s bandwidth usage reaches its high threshold percentage.
- partitionMEMThresholdReached. The current memory usage of the partition exceeds its high threshold percentage.
- partitionMEMThresholdNormal. The current memory usage of the partition becomes less than or equal to the normal threshold percentage.
- partitionMEMLimitExceeded. The current memory usage of the partition exceeds its memory limit percentage.
- partitionCONNLimitExceeded. The number of active connections for a partition exceeds its configured limit and new connections are being dropped.
- partitionCONNLimitNormal. The number of active connections for a partition goes below its configured limit and the partition can now accept a new connection.
- partitionBWLimitExceeded. The current bandwidth usage for a partition has exceeded its configured limit.
The threshold values for the SNMP traps are non-configurable and are as follows are:
- High threshold = 80% (applicable for all partition rate limit traps)
- Low threshold = 60 % (applicable for all partition rate limit traps)
- Memory limit = 95% (applicable only for partition memory traps)
Configuring PARTITION-RATE-LIMIT alarm
To configure PARTITION-RATE-LIMIT alarm in a specific partition and enable generation of the SNMP trap messages.
- Enable PARTITION-RATE-LIMIT Alarm
- Configure PARTITION-RATE-LIMIT Alarm
- Configure SNMP Trap Destination
To enable PARTITION-RATE-LIMIT alarm by using the NetScaler CLI
At the command prompt, type the following commands:
enable snmp alarm PARTITION-RATE-LIMIT
show snmp alarm PARTITION-RATE-LIMIT
To configure PARTITION-RATE-LIMIT Alarm by using the NetScaler CLI
At the command prompt, type the following command
set snmp alarm PARTITION-RATE-LIMIT [-state ( ENABLED | DISABLED )] [-severity <severity>] [-logging ( ENABLED | DISABLED )]
To configure SNMP trap destination by using the NetScaler CLI
At the command prompt, type the following command:
add snmp trap <trapClass> <trapDestination> [-version <version>] [-td <positive_integer>] [-destPort <port>] [-communityName <string>] [-srcIP <ip_addr|ipv6_addr>] [-severity <severity>] [-allPartitions ( ENABLED | DISABLED )]
To configure PARTITION-Rate-Limit alarm by using the NetScaler GUI
Navigate to System > SNMP > Alarms, select PARTITION-RATE-LIMIT alarm and configure the alarm parameters.
To configure SNMP trap destination by using the NetScaler GUI
Navigate to System > SNMP > Trap, specify the IP address of the destination device.
SNMP monitoring for partition resource utilization
Using SNMP, you can monitor a partition’s resource (such as bandwidth, connection, and memory) utilization details at real time on a NetScaler appliance. This is done by sending a SNMP request (such as SNMP GET, SNMP GET BULK, SNMP GETNEXT, or SNMP WALK) from the SNMP Manager.
Note
In order to monitor partition resources, you must configure the SNMP community in the default partition. Wherein, the partitionTable is maintained in the default partition, and the SNMP communication is done through the NSIP address of the appliance.
Consider a scenario where a NetScaler administrator wants to know the bandwidth usage of partition P1 on the appliance. The SNMP Manager retrieves this information by sending an SNMP GET request on the corresponding OID (partitionCurrentBandwidth) to the NSIP address of the appliance. The SNMP agent on the default partition retrieves and sends the current bandwidth usage of P1 to the SNMP Manager through the NSIP address.
The following table lists the SNMP counters which are part of partitionTable and its description:
SNMP Parameter | SNMP OID | Description |
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partitionName | 1.3.6.1.4.1.5951.4.1.1.88.1.1 | Partition name |
partitionCurrentBandwidth | 1.3.6.1.4.1.5951.4.1.1.88.1.2 | Current bandwidth usage of the partition. |
partitionCurrentConnections | 1.3.6.1.4.1.5951.4.1.1.88.1.3 | Current number of active connections of the partition. |
partitionMemoryUsagePcnt | 1.3.6.1.4.1.5951.4.1.1.88.1.4 | Current Memory usage (in percentage) of the partition. |
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