Specifications

Configuring and Managing Ports
RoamAbout Mobility System Software Configuration Guide 4-7
Configuring Port Operating Parameters
AutonegotiationisenabledbydefaultonaRoamAboutSwitch’s10/100Ethernetportsandgigabit
Ethernetports.
Youcanconfigurethefollowingportoperatingparameters:
• Speed
• Autonegotiation
•Portstate
Youalsocantoggleaport’sadministrativestateoffandbackontoresettheport.
10/100 Ports—Autonegotiation and Port Speed
RoamAboutSwitch10/100Ethernetportsuseautonegotiationbydefaulttodeterminethe
appropriateportspeed.
Toexplicitlysettheportspeedofa10/100port,usethefollowingcommand:
set port speed port-list {10 | 100 | auto}
Example
Tosettheportspeedonports1and3to10 Mbps,typethefollowingcommand:
RBT-8100# set port speed 1,3 10
Note: All ports on the RBT-8100 and RBT-8400 switches support full-duplex operating mode only.
They do not support half-duplex operation.
Note: Enterasys Networks recommends that you do not configure the mode of an switch port so that
one side of the link is set to autonegotiation while the other side is set to full-duplex. Although MSS
allows this configuration, it can result in slow throughput on the link. The slow throughput occurs
because the side that is configured for autonegotiation falls back to half-duplex. A stream of large
packets sent to an switch port in such a configuration can cause forwarding on the link to stop.
Notes:
• If you explicitly set the port speed (by selecting an option other than auto) of a 10/100 Ethernet
port, the operating mode is set to full-duplex.
• MSS allows the port speed of a gigabit port to be set to auto. However, this setting is invalid. If
you set the port speed of a gigabit port to auto, the link will stop working.