Network OS Administration Guide

Supporting Network OS 6.0.1a

Part Number: 53-1003768-04

Port Grouping policy

The Port Grouping (PG) policy partitions the VF_Ports, host, target ports within an Access Gateway-enabled switch into independently operated groups. Port Grouping allows you to dedicate specific hosts to specific fabric ports for performance, security, or other reasons.

Port Grouping policy is enabled by default when you enable Access Gateway mode and cannot be disabled.

To create port groups, you group N_Ports under a specific port group ID. By default, any VF_Ports mapped to the N_Ports belonging to a port group are members of that port group. All N_Ports in the group are shared by all VF_Ports mapped to those N_Ports. ENodes can log in as long as an online N_Port exists in the group.

In Network OS commands, N_Ports are designated by the format rbridge-id/port group/N_Port. For example, 5/0/1 designates RBridge 5/port group 1/N_Port 1.

When Access Gateway mode is enabled, a default port group 0 (pg 0) is created that contains all N_Ports on the switch. The maximum number of port groups supported is 16, including pg 0.

The following figure illustrates two port groups connecting VF_Ports to an FC fabric. Ports in PG 1 are connecting to one storage array, while ports in PG2 are connecting to a different storage array.

Figure 36. Port groups connecting to FC fabric
Following are considerations and limitations for the Port Grouping policy.
  • An ENode can log in.
  • A port cannot be a member of more than one port group.
  • The PG policy is enabled by default in when you enable AG mode. A default port group “0” (PG0) is created, which contains all N_Ports and mapped VF_Ports on the switch.
  • If an N_Port is added to a port group or deleted from a port group, it maintains its original mapping configuration. If an N_Port is deleted from a port group, it is automatically added to port group 0.