Cabletron Systems NB20E, User Manual, Page: 27 / 30

4-1
CHAPTER 4
TESTING AND LANVIEW
This section contains procedures to test the NB20E or NB25E Two Port
Ethernet Bridge after it has been connected to the network. A description
of the LANVIEW LEDs, the Forward Broadcast, and the Root Switch, is
also provided.
4.1 INSTALLATION CHECK-OUT
After the NB20E or NB25E is connected to the network, verify that
packets can be passed between the two Ethernet network segments via the
bridge. Two Ethernet node testers, such as Cabletron Systems'
LAN-MD™, are required for this procedure to generate valid data
packets.
Before you begin, test each Ethernet segment connected to the NB20E or
NB25E to ensure that the segments meet IEEE 802.3 specification limits.
1. Move the Forward Broadcast switch on the front panel of the Bridge
(Fig. 4-1) to the On (|) position. This will allow broadcast messages
sent by the LAN-MDs to pass through the bridge.
2. Using a transceiver (1, Fig. 4-2) and an AUI cable, connect a
LAN-MD (2) to one of the segments connected to the bridge (3).
3. Select and run test 6 - SERVER on this LAN-MD.
4. Verify that the Test Status PASS LED is lit and that the Status Code
reads 000 or 001. If these two conditions are met, the LAN-MD is now
the SERVER unit and will act as a packet echoer when used with
another LAN-MD.
Figure 4-1 LANVIEW LEDs
NB-25E
ETHERNET /IEEE 802.3 BRIDGING UNIT
WITH REMOTE LANVIEW® AND MANAGEMENT
XMT
RCV
CP
POK
PORT 1 2
1
1
0
0
ON LINE
STAND BY
FORWARD
BROADCAST
ROOT