3Com 3226 - SuperStack 3 Switch, User Manual

Page: 14 / 70

14 C
HAPTER
1: I
NTRODUCING THE
S
UPER
S
TACK
3 S
WITCH
3226
AND
S
WITCH
3250
and manually enable or disable flow control. The maximum segment
length is 100 m (328 ft) over Category 5 twisted pair cable.
If you disable auto-negotiation, Auto MDI/MDI-X will also be disabled.
10BASE-T/
100BASE-TX/
1000BASE-T Ports
The Switch has two auto-negotiating 10BASE-T/100BASE-TX/100BASE-T
ports configured as Auto MDI/MDI-X. These ports automatically provide
the appropriate connection. The default state for 10/100/1000 Mbps
ports is auto-negotiation enabled, where the speed, duplex and flow
control modes are negotiated.
Alternatively, you can manually set these ports to 10BASE-T half duplex,
10BASE-T full duplex, 100BASE-TX half duplex, 100BASE-TX full duplex
or 1000BASE-T full duplex and manually enable or disable flow control.
The maximum segment length is 100 m (328 ft) over Category 5 twisted
pair cable.
If you disable auto-negotiation, Auto MDI/MDI-X will also be disabled.
When an SFP module is inserted it has priority over the 10/100/1000 port
of the same number (25-26 on the Switch 3226, 49-50 on the
Switch 3250). The corresponding 10/100/1000 port is disabled when an
SFP module is present.
SFP Ports The two SFP (Small Form Factor Pluggable) ports support fiber Gigabit
Ethernet short-wave (SX) and long-wave (LX) SFP Transceivers in any
combination. This offers you the flexibility of using SFP transceivers to
provide connectivity between the Switch and a 1000 Mbps core network
or to create a high capacity aggregated link between two workgroups.
The only state for these ports is auto-negotiation enabled. As the speed
and duplex modes are fixed by the media type, only the flow control is
negotiated with the link partner.
When an SFP module is inserted it has priority over the 10/100/1000 port
of the same number (25-26 on the Switch 3226, 49-50 on the
Switch 3250). The corresponding 10/100/1000 port is disabled when an
SFP module is present.
LEDs Table 4 lists LEDs visible on the front of the Switch, and how to read their
status according to color. For information on using the LEDs for problem
solving, see “Solving Problems Indicated by LEDs” on page 46.
DUA1750-0AAA01.book Page 14 Friday, December 5, 2003 10:24 AM