Installation guide

Brocade FastIron SX Series Chassis Hardware Installation Guide 15
53-1002500-01
Hardware features
1
CAUTION
It is recommended that modules be disabled through the CLI before removal from the device. If
the operator wishes to remove the module without first disabling the module, the Enhanced Hot
Swap capability in software Release 03.2.00 and later supports this procedure for the FastIron
SX 800 and FastIron SX 1600 device. Enhanced Hot Swap (that is, no CLI disable) should be
performed during a maintenance window. On rare occasions, an Enhanced Hot Swap may result
in a software reload of the system. The likelihood of this event is very low.
CAUTION
It is important to wait a minimum of 10 seconds between the removal and insertion of a line
module. Re-insertion of a line module less than 10 seconds after the removal of a line module
may result in the line module not being properly recognized.
Refer to “Replacing an interface module” on page 112 for instructions.
48-port 10/100/1000 Mbps (RJ45) Ethernet PoE interface module
The 48-port 10/100/1000 Mbps Ethernet PoE interface module (SX-FI48GPP) uses two vertical
half-slots in the FastIron SX 800 or 1600 device and is supported in IPv4-only and IPv6-capable
systems. The ports support automatic MDI or MDIX detection, and use auto-sensing and
auto-negotiating to determine the speed (10, 100, or 1000 Mbps) and duplex mode (full-duplex or
half-duplex) of the port at the other end of the link, and adjust the local port accordingly. Ports
running at 1000 Mbps operate in full-duplex mode only and cannot be modified.
The module is 2:1 oversubscribed with an intelligent queue in front of the module packet
processor. Traffic on each port can be classified as high or low priority, and can be scheduled from
a queue using these priority settings ensuring QoS from the port of entry into the network. This
module is interoperable with IPv6 SX-FI6xx modules, SX-FI4xx module and associated management
modules. The module requires Ironware 7.2 or later for FastIron series.
2:1 oversubscription
Interface oversubscription is the use of a single physical ingress port to handle incoming traffic
from multiple devices, and is usually expressed as a ratio; the ratio shows the proportion of
incoming connections to physical ports carrying traffic to the backplane of the device. The FastIron
supports 2:1 oversubscription, allowing two devices to pass traffic through a single internal
physical port to take advantage of bandwidth which might otherwise go unused.
Oversubscription is achieved on the SX-FI48GPP by connecting 48 external ports to 24 internal
physical ports, providing 2:1 oversubscription. No CLI command is required to enable
oversubscription, but because two external ports are funneling traffic into each physical link, the
FastIron uses virtual interfaces (VEs) to divide each physical link into two logical ports. These VEs
can then be individually configured at the interface level.
NOTE
This interface module is not supported on FastIron SuperX devices.