Brocade FastIron SX Series Chassis Hardware Installation Guide - Manual (Page 39)

LEDs for 10 Gbps ports TABLE 12
LED Position State Meaning
Link or Activity Triangle-shaped LEDs point either upwards
or downwards towards the port they indicate
ON (Green) The port is connected, a link is
established with the remote port.
Blinking The port is transmitting or receiving
traffic.
OFF The port is not connected, no link
exists with the remote port
Third Generation 8-port 10-Gigabit Ethernet interface modules
Third Generation 8-port 10-Gigabit Ethernet interface modules have eight physical ports, through which
you can connect the Brocade device to other network devices at a speed of 10 Gigabits per second.
The modules have two optical interfaces with LC connectors for 10-Gigabit Small Form Factor
Pluggable (SFP+) MSA-compliant transceivers. The transceivers support 10GBase-SR, 10GBase-LR,
and 10GBase-ER fiber optic cabling for LAN.
The module requires Ironware 7.3 or later for FastIron series.
4:1 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 carry traffic to the backplane of the device.
An oversubscribed module allows aggregate bandwidth of user ports exceed the bandwidth of the
Network Processor (NP). The SX-FI-8XG has two separate NPs. The front-end NP provides basic traffic
classification and is used as a traffic multiplexer. The back-end NP is a traffic aggregator and handles
data forwarding.
The SX-FI-8XG module has eight 4:1 oversubscribed ports. Oversubscription is achieved on the SX-
FI8-XG by connecting the eight 10 GE external ports to two internal 10GE ports, providing 4:1
oversubscription. The eight 10GE ports on the SX-FI8XG are divided into two groups of internal
physical ports, with ports 1-4 in one group and ports 5-8 in the other group. Each group shares 10GE
bandwidth internally. No CLI command is required to enable oversubscription, but because four external
ports are funneling traffic into each physical link, the SX-FI8XG uses virtual interfaces (VEs) to divide
each physical link into four logical ports. These VEs can be individually configured at the interface level.
FIGURE 14 Third Generation 8-port 10-Gigabit Ethernet interface module
The 10 Gbps ports provide status information using the LEDs listed in the table below.
Third Generation 8-port 10-Gigabit Ethernet interface modules
Brocade FastIron SX Series Chassis Hardware Installation Guide 37
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