Description

The snmp_dca_base monitor erroneously sets a dynamic-ratio weight of 1.

This issue occurs when all of the following conditions are met:

• There is a pool with dynamic ratio load balancing.
• There is a node using the snmp_dca_base monitor.

While the snmp_dca_base monitor correctly queries the node for statistics, the monitor erroneously sets the dynamic-ratio weight for the node to 1.

Impact

Traffic is not dynamically load balanced across the pool members.

Symptoms

As a result of this issue, you may encounter the following symptoms:

• Each node in the pool has a dynamic-ratio value of 1.
• The node weight is reported as 1 in the /var/tmp/snmpdca.log file:

  Main:Weight =1 (weight1 = 0.000000, weight2 = 0.000000)

  Note: Monitor logging for the snmp_dca and snmp_dca_base is not enabled by default. To enable monitor logging for the snmp_dca and snmp_dca_base monitors, refer to SOL6529: Enabling and disabling monitor logging for the snmp_dca and snmp_dca_base monitors.

Status

F5 Product Development has assigned ID 390514 to this issue, and has confirmed that this issue exists in the products listed in the Applies To box. For information about releases or hotfixes that resolve this issue, refer to the following table:

Workaround

None

Supplemental Information

• SOL167: Downloading software and firmware from F5
• SOL13123: Managing BIG-IP product hotfixes (11.x)
• SOL6529: Enabling and disabling monitor logging for the snmp_dca and snmp_dca_base monitors
• SOL9125: Overview of Dynamic Ratio load balancing
• SOL14063: The snmp_dca monitor does not set the dynamic ratio