3Com 4007, Руководство по выпуску

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LX 70 GBIC Transceiver 23
„
Partitioned ports may cause the Spanning Tree Protocol (STP) to
calculate and establish new paths. Then, when the ports are released
from their partitioned state, this process may recur.
„
You cannot enable any form of autonegotiation on existing trunked
links. Conversely, if you have autonegotiation enabled on ports and
then create a trunk with those ports, the system automatically disables
autonegotiation on those ports. Trunked links must always operate at
the same speed and duplex mode. 3Com recommends that you fix the
port speed and duplex mode at both ends of the connection prior to
creating trunks.
„
When Advanced Autonegotiation forces a port into full duplex mode,
that setting is not saved into nonvolatile memory. Thus, this setting
does not survive a system reset or reboot.
LX 70 GBIC
Transceiver
Software Release 3.0.5 provides support for the Long Haul (70km) GBIC
Transceiver (Model Number 3CGBIC97).
The Gigabit Interface Converter (GBIC) ports on your system connect to
Gigabit Ethernet networks through a GBIC transceiver, providing a
high-speed connection over fiber-optic cable. The transceiver connects to
the network using a fiber-optic duplex Subscriber Connector (SC).
The Long Haul (70km) GBIC Transceiver can handle transmission rates of
up to 1.25 Gbit/sec and distances of up to 70km over single mode fiber.
To ensure optimal performance, compatibility, and regulatory compliance,
use only GBIC transceivers that 3Com supports. For a list of GBIC devices
that are qualified for the CoreBuilder 3500, CoreBuilder 9000 (Switch
4007), and CoreBuilder 9400, see this 3Com Web site:
http://www.3com.com/gigabit_ethernet/gbics