Connectivity; Auto-Negotiation; Runtime Ip Address Discovery - Cabletron Systems DLE52-MA User Manual

1.1

CONNECTIVITY

The DLE02-MA and the DLE52-MA connect to Ethernet networks or
workstations through the RJ45 ports on the front panel. These ports are
IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliant. The
ports support Category 5 Unshielded Twisted Pair cables with an
impedance between 85 and 111 ohms at lengths up to 100 meters. They
also support Category 3 for 10 Mbps, but not 100 Mbps.
The DLE52-MA has a slot for an optional HSIM or VHSIM to provide
additional connectivity to various networking technologies.
1.2

AUTO-NEGOTIATION

The twisted pair ports on the front panel of the DLE02-MA and the
DLE52-MA modules have the ability to auto-negotiate the type of
connection required to provide a link to another device. During
Auto-Negotiation, two devices automatically exchange information
"telling" each other what their operating capabilities are. The
Auto-Negotiation feature targets the maximum capabilities that can be
reached between the two devices. For example, the DLE02-MA and the
DLE52-MA adjust to 100 Mbps when the device on the other end of the
connection can also adjust between 10 Mbps or 100 Mbps. If the device
on the other end of the connection can only operate at 10 Mbps, then the
DLE02-MA and the DLE52-MA adjust to 10 Mbps operation.
When Auto-Negotiation is supported at both ends of a link, the two
devices dynamically adjust to full or half duplex operation based on the
maximum capability that can be reached between the two devices. If the
device connected to the DLE02-MA or the DLE52-MA cannot
auto-negotiate, the DLE02-MA and the DLE52-MA interface operates
according to the capability of the other device.
1.3

RUNTIME IP ADDRESS DISCOVERY

This feature enables the modules to automatically accept an IP address
from a Boot Strap Protocol (BootP) server on the network into NVRAM
without requiring a user to enter an IP address through Local
Management.
When the modules are connected to the network and powered up,
Runtime IP Address Discovery (RAD) checks the modules for an IP
DLE02-MA/DLE52-MA User's Guide
Connectivity
1-3