Extreme Networks ExtremeWare 7.2e, Installation And User Manual

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82 ExtremeWare 7.2e Installation and User Guide
Configuring Ports
Combination Ports” on page 89. If you plan to use the automatic failover feature, ensure that port
settings are set correctly for autonegotiation.
Fiber ports run at 1000 Mbps, regardless of whether you attempt to manually slow them using the CLI.
If you plan on running the copper ports at 1000 Mbps, it is recommended that you keep autonegotiation
on. For ports running at slower speeds, you can manually configure the speed of 10/100/1000 Mbps
ports and disable autonegotiation.
10BASE-T and 100BASE-TX ports can connect to either 10BASE-T or 100BASE-T networks. By default,
the ports autonegotiate port speed. You can also configure each port for a particular speed (either 10
Mbps or 100 Mbps).
Gigabit Ethernet fiber ports only run at full-duplex but you must specify the
duplex
setting. The
10/100/1000 copper ports, however, can be either be configured for half-duplex or full-duplex
operation. These 10/100/1000 Mbps ports are supported only through autonegotiation.
To configure port speed and duplex setting, use the following command:
configure ports [<portlist> | all | mgmt] auto off {speed [10 | 100 | 1000]} duplex
[half | full]
To configure the system to autonegotiate, use the following command:
configure ports [<portlist> | mgmt | all] auto on
Summit 400 ports do not advertise or support flow control frames.
Turning Off Autonegotiation for a Gigabit Ethernet Port
In certain interoperability situations, you may need to turn autonegotiation off on a Gigabit Ethernet
port. Even though a Gigabit Ethernet port runs only at full duplex, you must specify the duplex setting.
NOTE
1000BASE-T ports support only autonegotiation.
The following example turns autonegotiation off for port 4 (a combination port):
configure ports 4 auto off duplex full speed 1000
Configuring Link Detection
ExtremeWare contains an interrupt service routine (ISR) that sends interrupts when links transition. If a
link continuously transitions, causing the ISR to send continuous interrupts, the middle layer filter
filters out the continuous interrupt messages. You can configure the interaction between these functions
using the following command:
configure ports <portlist> link-detection-level <link-detection-level>
Configuring Interpacket Gap for Gigabit Ethernet Ports
On the Summit 400-48t, you can configure the Interpacket Gap for 1 or 10 Gigabit Ethernet ports. The
Interpacket Gap, sometimes referred to as the Interframe Gap, is the transmit packet byte-time delay
between successive data packets mandated by the IEEE for Ethernet networks. Byte-time is the amount