Citrix Systems CITRIX NETSCALER 9.3 manual Configuring Snmp Alarms for Rate Limiting

Citrix NetScaler Administration Guide

2.In the details pane, click Add.

3.In the Create SNMP Community dialog box, specify values for the following parameters, which correspond to parameters described in "Parameters for configuring an SNMP community string" as shown:

•Community String*—communityName

•Permission*—permissions *A required parameter

4.Click Create, and then click Close.

A message appears in the status bar, stating that the SNMP community string has been configured successfully.

To remove an SNMP community string by using the configuration utility

1.In the navigation pane, expand System, click SNMP, and then click Community.

2.In the details pane, select the community that you want to remove (for example, Com_All), and then click Remove.

Configuring SNMP Alarms for Rate Limiting

Citrix® NetScaler® appliances such as the NetScaler MPX 10500, 12500, and 15500 are rate limited. The maximum throughput (Mbps) and packets per second (PPS) are determined by the license purchased for the appliance. For rate-limited platforms, you can configure SNMP traps to send notifications when throughput and PPS approach their limits and when they return to normal.

Throughput and PPS are monitored every seven seconds. You can configure traps with high-threshold and normal-threshold values, which are expressed as a percentage of the licensed limits. The appliance then generates a trap when throughput or PPS exceeds the high threshold, and a second trap when the monitored parameter falls to the normal threshold. In addition to sending the traps to the configured destination device, the NetScaler logs the events associated with the traps in the /var/log/ ns.log file as EVENT ALERTSTARTED and EVENT ALERTENDED.

Exceeding the throughput limit can result in packet loss. You can configure SNMP alarms to report packet loss.

For more information about SNMP alarms and traps, see Configuring the NetScaler to Generate SNMPv1 and SNMPv2 Traps on page 48.

Configuring an SNMP Alarm for Throughput or PPS

To monitor both throughput and PPS, you must configure separate alarms.

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