3Com Switch 4200G Configuration Guide

14
BASIC PORT CONFIGURATION
Ethernet Port
Overview
Types and Numbers of
Ethernet Ports
Table 45 lists the types and numbers of the Ethernet ports available on the S4200G
series Ethernet switches.
The Ethernet ports of the S4200G series switches have the following characteristics:
■ The 10/100/1000BASE-TX Ethernet ports (except combo ports) support
MDI/MDI-X autosensing. They can work in half-duplex/full-duplex or
autonegotiation mode. They can also negotiate with other network devices for
working mode and rate, automatically select the optimal working manner and
rate, and simplify the system configuration and management.
■ Gigabit SFP ports work in Gigabit full-duplex mode. The duplex mode can be set
as full or auto, with a rate of 1000Mbps.
■ 10 Gigabit Ethernet optical interfaces work in fixed 10,000 Mbps full-duplex
mode.
Link Types of Ethernet
Ports
An Ethernet port of the S4200G switch can operate in three different link types:
■ Access: An access port can belong to only one VLAN, and is generally used to
connect user PCs.
■ Trunk: A trunk port can belong to more than one VLAN. It can receive/send
packets from/to multiple VLANs, and is generally used to connect another switch.
■ Hybrid: A hybrid port can belong to more than one VLAN. It can receive/send
packets from/to multiple VLANs, and can be used to connect either a switch or
user PCs.
A hybrid port allows the packets of multiple VLANs to be sent without tags, but a
trunk port only allows the packets of the default VLAN to be sent without tags.
You can configure all the three types of ports on the same Ethernet switch. However,
note that you cannot directly switch a port between trunk and hybrid and you must
set the port as access before the switching. For example, to change a trunk port to
hybrid, you must first set it as access and then hybrid.
Table 45 Description of Ethernet port type and port number
Device Model Type and number of fixed ports
Number of
expansion slots
Switch 4200G 12-port 12 × 10/100/1000M electrical interfaces
Four Gigabit SFP Combo ports
1
Switch 4200G 24-port 24 × 10/100/1000M electrical interfaces
Four Gigabit SFP Combo ports
2
Switch 4200G 48-port 48 × 10/100/1000M electrical interfaces
Four Gigabit SFP Combo ports
2