Extreme networks Summit1 Manuale Utente

4-2

S

UMMIT

 S

WITCH

 I

NSTALLATION

 

AND

 U

SER

 G

UIDE

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ONFIGURING

 P

ORTS

C

ONFIGURING

 P

ORT

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PEED

 

AND

 D

UPLEX

 S

ETTING

By default, the Summit is 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.

Fast Ethernet 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 ports are statically set to 1 Gbps, and their speed cannot be modified.

All ports on the Summit can be configured for half-duplex or full-duplex operation. By 
default, the ports autonegotiate the duplex setting. 

To configure port speed and duplex setting, use the following command:

config port <portlist> auto off {speed [10 | 100]} duplex [half | full]

To configure the switch to autonegotiate, use the following command:

config port <portlist> auto on

In certain interoperability situations, it is necessary to turn autonegotiation off on a 
Gigabit Ethernet port. Even though a Gigabit Ethernet port runs only at full duplex and 
gigabit speeds, the command that turns off autonegotiation must still include the 
duplex setting. 

The following example turns autonegotiation off for port 49 (a Gigabit Ethernet port);

config port 49 auto off duplex full

Summit.bk : 4PORTS.FM  Page 2  Thursday, June 18, 1998  9:27 AM