Port Partioning; Fec Configuration Support - Extreme Networks 9920 Installation Manual

Port Partioning

Port Partioning
With port partitioning (or channelization), you can configure a single port to operate as four individual
ports. Port partitioning is supported for the following port speeds:
40 Gbps (QSFP+)
When partitioned, the port operates as four seperate 10 Gbps ports while using QSFP+ cables.
100 Gbps (QSFP28)
When partitioned, the port operates as four seperate 25 Gbps ports while using QSFP28 cables.
When partitioning either 40 Gbps QSFP+ ports or 100 Gbps QSFP28 ports, only the eight even
numbered ports can be partioned. The lower odd numbered port interface is blocked when the higher
even numbered port interface is partioned. You can use 40GBASE-CR4 (copper) or 40GBASE-SR4
(fiber) or 100GBASE-CR4 (copper) or 100GBASE-SR4 (fiber) breakout cables to connect the 40/100
Gigabit Ethernet ports to other servers, storage devices, and switches. For breakout cable details, see
Extreme Networks Pluggable Transceivers Installation
Ports are not partitioned by default. If partitioning is not enabled, the ports display the existing port
format as "slot/port". When partitioning is enabled, ports display the format as "slot/port/sub-port" in
the input/output.

FEC Configuration Support

Configure Forward Error Correction (FEC) on a port to obtain error control in data transmission over an
unreliable or noisy channel. You can configure FEC on 100 Gbps ports or on channelized 100 Gbps ports
operating at 25 Gbps speed.
The following FEC options are supported:
•
Disabled
•
RS-FEC
•
FC-FEC
FEC is not supported on a 100 Gbps port operating at 40 Gbps speed or on a management port.
Important
On ports that support FEC configuration, ensure that you configure the same option at both
end points. Otherwise, the link does not come up.
18 9920 Network Packet Broker Hardware Installation Guide
Extreme 9920 Overview
Guide.