HiperSockets and VLAN

HiperSockets™ supports VLANs, which means you can logically subdivide the internal LAN for a HiperSockets CHPID into multiple virtual LANs. Therefore, two stacks that configure the same VLAN ID for the same CHPID can communicate over HiperSockets, while two stacks that configure different VLAN IDs cannot. For HiperSockets interfaces that share a single DATAPATH device, the VLAN ID provided applies to both IPv4 and IPv6 connections.

Guideline: If you configure a VLAN ID on a stack using a HiperSockets CHPID, configure a VLAN ID for all other stacks using the same CHPID.

When you use VLAN IDs, the z/OS® TCP/IP stack can have multiple connections to the same HiperSockets CHPID. One connection is allowed for each unique combination of VLAN ID and IP version (IPv4 or IPv6). Each connection is defined by an INTERFACE statement and uses one DATAPATH device from the TRLE definition created by VTAM®. To configure one or more VLANs for a single HiperSockets CHPID, see Steps for configuring virtual LANs for a HiperSockets CHPID.

Restrictions:

A stack can support a maximum of 8 VLAN interfaces per IP version to the same HiperSockets CHPID.
If multiple stacks on the same z/OS image are using the same HiperSockets CHPID, then those stacks can collectively activate a maximum of 8 VLAN interfaces per IP version for that CHPID.