Brocade Access Gateway Administrator's Guide Supporting Fabric OS v7.0.0 (53-1002156-01, April 2011)

14 Access Gateway Administrator’s Guide

53-1002156-01

Access Gateway mapping

Considerations for initiator and target ports

The following connections are possible for the Fibre Channel Protocol (FCP) initiator (host) and

target ports through AG:

• All F_Ports connect to all initiator ports.

• All F_Ports connect to all target ports.

• Some F_Ports connect to initiator ports and some F_Ports connect to target ports.

For the last case, communication between initiator and target ports is not supported if both are

mapped to the same N_Port. Therefore, follow these recommendations for initiator and target port

mapping:

• If connecting a host and target port to the same AG, you should map them to separate N_Ports

and connect those N_Ports to the same fabric.

• Use separate port groups for initiator and target ports.

• When configuring secondary port mapping for failover and failback situations, make sure that

initiator and target F_Ports will not fail over or fail back to the same N_Port.

Brocade 8000 mapping differences

The Brocade 8000 contains 24 internal FCoE ports and 8 external Fibre Channel ports. In Access

Gateway mode, the internal FCoE ports are configured logically as F_Ports, while the external Fibre

Channel ports are configured as N_Ports. The FCoE ports are divided into six groups, or trunks,

consisting of four ports each. All four ports in a group are mapped to one N_Port. Although you can

change the default port mapping for these groups (refer to “Default port mapping” on page 11),

consider the following when working with these FCoE ports:

• All four FCoE ports in the group are mapped to the same N_Port.

• You cannot map individual FCoE ports within the same port group to different N_Ports.

• Any Access Gateway operation that involves moving F_Ports will move all FCoE ports in the

group.

• All four FCoE ports in a group will fail over or fail back to one N_Port.

Adding F_Ports to an N_Port

You can modify the default port mapping by adding F_Ports to an N_Port. Adding an F_Port to an

N_Port routes that traffic to and from the fabric through the specified N_Port.

You can assign an F_Port to only one primary N_Port at a time. If the F_Port is already assigned to

an N_Port, you must first remove it from the N_Port before you can add it to a different N_Port.

Use the following steps to add an F_Port to an N_Port.

1. Connect to the switch and log in using an account assigned to the admin role.

2. Enter the ag command with the

--mapadd n_portnumber f_port1;f_port2;... option to add the

list of F_Ports to the N_Port.

The F_Port list can contain multiple F_Port numbers separated by semicolons. In the following

example, F_Ports 6 and 7 are mapped to N_Port 13.

switch:admin> ag --mapadd 13 "6;7"

F-Port to N-Port mapping has been updated successfully