User noticed that his StoreFront servers are not load balanced properly. They currently have configured 4 StoreFront servers which is part of a server group and service group on the NetScaler.

The NetScaler load balancing method is set to Round Robin, however only one StoreFront server is receiving all connections.

The load balancing vserver configuration was configured as below:
-persistenceType SOURCEIP -timeout 120 -lbMethod ROUNDROBIN -persistMask 255.0.0.0

To resolve this issue changed the netmask setting of persistency to 255.255.255.255.

Problem Cause

Service group had netmask set to 255.0.0.0 in persistency settings that caused all users with all IPs to be sent to the same StoreFront server.