Specifications

5-2
Cisco SN 5428-2 Storage Router Software Configuration Guide
78-15471-01
Chapter 5 Configuring Fibre Channel Interfaces
Configuring FC Interfaces
Configuring FC Interfaces
The SN 5428-2 has an integrated switch component with Fibre Channel interfaces (fc1 through fc8) that
support the port types described in Table 5-1. The SN 5428-2 FC interfaces are auto configuring; for
public devices and other switches, the SN 5428-2 can automatically set the port mode as each interface
discovers the type of device to which it is connected.
The following are the default operational characteristics for the FC interfaces:
• Fairness disabled (switch has priority)
• Fabric Address Notification (FAN) enabled
• Automatically negotiated transfer rate (linkspeed auto)
• Multi-Frame sequence bundling enabled (with a timeout value of 10)
Table 5-1 FC Port Types
Type Description Configuration
E_Port Operates as an expansion port when connected to another SN 5428-2 or an
FC-SW-2 compliant switch. Links multiple FC switches together into a
fabric.
Self-discovered by configuring a
G_Port or GL_Port.
F_Port Port type is fabric. Supports connection to a single public device (N_Port). Configured with the
interface fc? type command, or
self-discovered by configuring a
G_Port or GL_Port.
FL_Port Port type is fabric loop (also known as “public loop”). Supports connection
to a loop of up to 126 public devices (NL_Port).
Configured with the
interface fc? type command, or
self-discovered by configuring a
GL_Port.
G_Port Port type is generic and can function as either an F_Port or an E_Port.
Self-discovers as an F_Port when connected to a single public device, or as
an E_Port when connected to another SN 5428-2 or an FC-SW-2 compliant
switch. May also self-discover as an E_Port when connected to a switch
running non-FC-SW-2 compliant firmware.
Configured with the
interface fc? type command.
GL_Port Port type is generic loop; this is the default port type. Self-discovers as an
FL_Port when connected to a loop of public devices, an F_Port when
connected to a single device, or an E_Port when connected to another
SN 5428-2 or an FC-SW-2 compliant switch. May also self-discover as an
E_Port when connected to a switch running non-FC-SW-2 compliant
firmware.
Configured with the
interface fc? type command.
TL_Port Port type is translated loop. Supports connection to a loop of up to 126
private devices with the ability to communicate with “off-loop” devices,
such as public fabric devices and private devices on other TL_Ports.
TL_Ports connect to devices that confirm to the Fibre Channel-Private Loop
SCSI Direct Attach (FC-PLDA) standard. A TL_Port acts as a proxy for the
off-loop device, translating private frames to and from public frames. Each
TL_Port can proxy up to 64 off-loop devices.
Configured with the
interface fc? type tl-port mode
command.
Donor Enables the SN 5428-2 to extend buffer credits from the donor port to
selected FC ports.
Configured with the
interface fc? type donor
command.