Brocade Access Gateway Administrator's Guide - Supporting Fabric OS v5.2.1 (53-1000430-01)

1-4 Access Gateway Administrator’s Guide
Publication Number: 53-1000430-01
Port mapping
1
Port mapping
Brocade Access Gateway uses mapping—that is, pre-provisioned routes—to direct traffic from the
hosts to the fabric. When you first enable Access Gateway mode, the F_Ports are mapped to a set of
predefined N_Ports, see Appendix A, “Default Port Mapping”. After the initial setup, you can manually
change the mapping if required.
Figure 1-3 shows a mapping with eight F_Ports evenly mapped to four N_Ports on Brocade Access
Gateway. The N_Ports connect to the same fabric via different edge switches. This example is also used
to explain mapping, failover, and failback polices.
Figure 1-3 Example F_Port to N_Port mapping
The following table describes the mapping and fabric connection shown in Figure 1-3:
Table 1-2 Example port mapping
Access Gateway Fabric
N_Port F_Port Edge switch F_Port
N_1 F_1, F_2 Switch_A F_A1
N_2 F_3, F_4 Switch_A F_A2
N_3 F_5, F_6 Switch_B F_B1
N_4 F_7, F_8 Switch_B F_B2
N_2
F_A2
Hosts
Access Gateway
Edge Switch
Fabric
(Switch_A)
enabled
NPIV
F_4
F_3
F_2
F_1
N_1
F_A1
enabled
NPIV
N_3
F_B1
enabled
NPIV
Host_1
Host_2
Host_3
Host_4
F_5
Host_5
F_6
Host_6
F_7
Host_7
F_8
Host_8
Edge Switch
(Switch_B)
N_4
F_B2
enabled
NPIV