Brocade Access Gateway Admin Guide v6.1.0 (53-1000605-02, June 2008)

44 Access Gateway Administrator’s Guide
53-1000605-02
N_Ports
4
4. The host logs into the fabric as follows:
a. The host sends a FLOGI (fabric login) request.
b. Access Gateway converts the FLOGI request into an FDISC request to the fabric with the
same parameters as the host.
c. The fabric processes the request and sends an FDISC response.
d. Access Gateway converts the FDISC Accept link service reply (ACC) response to the host as
an FLOGI ACC using the same parameters as the fabric.
e. The host receives the response from the fabric.
Figure 9 shows Access Gateway logically transparent to the host and the fabric after ports
are initialized.
FIGURE 9 Initialized ports in Access Gateway
You can expand your fabric by configuring the F_Ports to connect to the fabric as N_Ports, which
increases the number of device ports you can connect to a single fabric port. You can connect AG to
more than one fabric.
When AG is connected to at least one edge switch in the fabric, Fibre Channel ports operate as
either a target or as an initiator. Fibre Channel ports target ports can also connect to AG as F_Ports.
The following combinations are possible with initiators and targets:
• All F_Ports connect to the FCP initiator port.
• All F_Ports connect to the FCP target port.
• Some F_Ports connect to the FCP initiator port and some connected to FCP target port.
• Targets and hosts that are connected to the same AG are not supported.
N_Ports
The AG port connected to the Enterprise fabric must be configured as an N_Port using the
portcfgnport mode command. By default, on embedded switches, only the internal ports of Access
Gateway are configured as F_Ports. All external ports are configured (locked) as N_Ports. For more
information on which ports are mapped by default, see Table 9 on page 51. The internal ports
connect hosts in the bladed server and external ports connect to the fabric.
a
b
c
d
e