Cabletron Systems SEHI100TX-22 - Manual (Page 43)

SEHI100TX User’s Guide 6-1
CHAPTER 6
TROUBLESHOOTING
This chapter contains instructions for using LANVIEW LEDs to
troubleshoot physical layer network problems. It also describes how to
reset the SEHI and how to reset the NVRAM switch.
6.1 INSTALLATION TEST
After connecting the SEHI to the network, verify that packets pass
between all Ethernet devices connected to the SEHI and any other devices
connected to the network. If there is a problem with any of the attached
devices, check the link as follows:
1. Check that the LNK LED, if applicable, for the port is on. If the LED
is off, perform each of the following steps until the LED is on:
a. Check that the 100BASE-TX device at the other end of the twisted
pair segment is powered up.
b. Verify that the connector on the twisted pair segment has the
proper pinouts. Refer to Chapter 3 for the pin assignments for
twisted pair connectors.
c. For the EPIM-100FX or EPIM-100FMB, check that the TX and
RX strands are properly connected.
d. Check the cable for continuity. Several tools are available for this
test, depending on the media used.
e. Check that the twisted pair segments or fiber optic segments meet
cable specifications as described in Chapter 3.