HP StorageWorks 2/16V Brocade Access Gateway Administrator's Guide - Supportin - Page 17

Port initialization

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Port initialization 1 Port initialization To ensure that all hosts are brought online when Brocade Access Gateway starts up, the ports are initialized in the following manner: 1. All N_Ports are initialized. During N_Port initialization all the F_Ports are disabled (kept OFFLINE). The ports are enabled or disabled as follows: • Enabled (online) if the port receives a fabric login event and is connected to an F_Port of an edge switch that supports NPIV (N_Port ID virtualization). • Disabled (offline) if the port is not connected to a fabric or is connected to a fabric port that does not support NPIV. 2. All F_Ports mapped to online N_Ports are enabled. F_Ports that are inactive or that have no hosts are disabled. 3. F_Ports mapped to an offline N_Port with the failover policy enabled fail over to an online N_Port. 4. The host logs in to the fabric as follows: a. The host sends a FLOGI (fabric login) request. b. Access Gateway proxies the request using FDISC primitive to the fabric with the same parameters as the host. c. The fabric processes the request and sends an FDISC response. d. Access Gateway proxies the response to the host using the same parameters as the fabric. e. The host receives the response from the fabric. After ports are initialized, Access Gateway becomes logically transparent to the host and the fabric, as shown in Figure 1-4. a b c d e Figure 1-4 Host log in request Access Gateway Administrator's Guide 1-5 Publication Number: 53-1000430-01

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Access Gateway Administrator’s Guide
1-5
Publication Number: 53-1000430-01
Port initialization
1
Port initialization
To ensure that all hosts are brought online when Brocade Access Gateway starts up, the ports are
initialized in the following manner:
1.
All N_Ports are initialized. During N_Port initialization all the F_Ports are disabled (kept
OFFLINE).
The ports are enabled or disabled as follows:
•
Enabled
(online) if the port receives a fabric login event and is connected to an F_Port of an
edge switch that supports NPIV (N_Port ID virtualization).
•
Disabled
(offline) if the port is not connected to a fabric or is connected to a fabric port that
does not support NPIV.
2.
All F_Ports mapped to online N_Ports are enabled. F_Ports that are inactive or that have no hosts
are disabled.
3.
F_Ports mapped to an offline N_Port with the failover policy enabled fail over to an online N_Port.
4.
The host logs in to the fabric as follows:
a.
The host sends a FLOGI (fabric login) request.
b.
Access Gateway proxies the request using FDISC primitive to the fabric with the same
parameters as the host.
c.
The fabric processes the request and sends an FDISC response.
d.
Access Gateway proxies the response to the host using the same parameters as the fabric.
e.
The host receives the response from the fabric.
After ports are initialized, Access Gateway becomes logically transparent to the host and the
fabric, as shown in
Figure 1-4
.
Figure 1-4
Host log in request
a
b
c
d
e