Extreme Networks ExtremeWare 7.7, Command Reference Manual

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ExtremeWare 7.7 Command Reference Guide 253
4
Commands for Configuring Slots and
Ports on a Switch
This chapter describes:
• Commands related to enabling, disabling, and configuring individual ports
• Commands related to configuring port speed (Fast Ethernet ports only) and half- or full-duplex
mode
• Commands related to creating load-sharing groups on multiple ports
• Commands related to displaying port statistics
• Commands related to enabling and disabling loopback detection
By default, all ports on the switch are enabled. After you configure the ports to your specific needs, you
can select which ports are enabled or disabled.
Fast Ethernet ports can connect to either 10Base-T or 100Base-T networks. By default, the ports
autonegotiate (automatically determine) the port speed. You can also configure each port for a particular
speed (either 10 Mbps or 100 Mbps).
Gigabit Ethernet ports are statically set to 1 Gbps, and their speed cannot be modified.
The switch comes configured to use autonegotiation to determine the port speed and duplex setting for
each port. You can select to manually configure the duplex setting and the speed of 10/100 Mbps ports,
and you can manually configure the duplex setting on Gigabit Ethernet ports.
All ports on the switch can be configured for half-duplex or full-duplex operation. The ports are
configured to autonegotiate the duplex setting, but you can manually configure the duplex setting for
your specific needs.
Flow control is supported only on ”i ” series Gigabit Ethernet ports. It is enabled or disabled as part of
autonegotiation. If autonegotiation is set to off, flow control is disabled. When autonegotiation is turned
on, flow control is enabled.
Load sharing with Extreme Networks switches allows you to increase bandwidth and resilience
between switches by using a group of ports to carry traffic in parallel between switches. The sharing
algorithm allows the switch to use multiple ports as a single logical port. For example, VLANs see the
load-sharing group as a single logical port. The algorithm also guarantees packet sequencing between
clients.
If a port in a load-sharing group fails, traffic is redistributed to the remaining ports in the load-sharing
group. If the failed port becomes active again, traffic is redistributed to include that port.