If the OF sessions are restricted to 1000 or 1024, please check the following points:
a) DPID configured by IxNetwork, they should exclusive with each switch.
b) File descriptor of the OS which running the controllers(default with 1024).
c) ARP tables volume of the OS which running the controllers(default with 1024).
In order to test out the best performance of controllers, several ports of IxNetwork are suggested. In the test below, we used four ports to do the test, each ports with same number of switches, forexample, 500 switches test, we configed 125 switches each port.

Preparation

Cluster formed(three nodes)

Code Block

language	text

$ $ONOS_INSTALL_DIR/bin/onos-form-cluster OC1 OC2 OC3

Features install

Code Block
onos> feature:install onos-drivers onos> feature:install onos-openflow onos> feature:install onos-openflow-base

Test steps

...