VMAX3, VMAX All Flash: Maximum number of Network IDs allowed for iSCSI components

The following errors occur when attempting to discover a iSCSI Target instance with a Network ID above the value of 511.

[root@vmax iscsi]# iscsiadm -m discovery -t sendtargets -p xx.xx.xx.xx:xxxx
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: cannot make connection to xx.xx.xx.xx: Connection refused
iscsiadm: connection login retries (reopen_max) exceeded
iscsiadm: Could not perform SendTargets discovery: encountered connection failure

A Network ID is a user definable value that is required for associating iSCSI target nodes to the IP Interface on the array. The purpose of creating unique Network IDs are for isolating IP routing tables. This is done to support multiple IP addresses with the same IP subnet on an SE director emulation. When creating an IP Interface and a iSCSI Target Node, the network ID should match for that particular iSCSI Target instance.

Currently the user definable valid values are 0 to 511. Anything above 511 is not be recognized. 

Redefine the Network ID value between the supported range of 0-511.