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

10 Access Gateway Administrator’s Guide

53-1002156-01

Access Gateway mapping

When operating in AG mode, you must specify pre-provisioned routes that AG will use to direct

traffic from the devices (hosts or targets) on its F_Ports to the ports connected to the fabric using

its N_Ports. This is unlike Native switch mode where the switch itself determines the best path

between its F_Ports. This process of pre-provisioning routes in AG mode is called “mapping.”

During mapping, device World Wide Names (WWN) or F_Ports are assigned to N_Ports and N_Port

groups on the switch running in AG mode. Mapping ensures that a device logging in to the switch

will always connect to the fabric through a specific N_Port or N_Port group. Two types of mapping

are available:

• Port mapping

A specific F_Port is mapped to a specific N_Port. This ensures that all traffic from a specific

F_Port always goes through the same N_Port. To map an F_Port to an N_Port group, simply

map the port to an N_Port that belongs to that port group. All F_Ports mapped to that N_Port

will be part of that N_Port group.

• Device mapping (optional)

A specific device WWN is mapped to N_Port groups (preferred method) or to specific N_Ports.

Device mapping allows a virtual port to access its destination device regardless of the F_Port

where the device resides. Device mapping also allows multiple virtual ports on a single

physical machine to access multiple destinations residing in different fabrics.

Device mapping is optional and should be added on top of existing port maps. Port mapping must

exist at all times.

Port mapping

F_Ports must be mapped to N_Ports before the F_Ports can come online. Figure 4 on page 11

shows an example in which eight F_Ports are mapped evenly to four N_Ports on a switch in AG

mode. The N_Ports connect to the same fabric through different Edge switches.