EMM-E6 Ethernet User's Guide

LANVIEW LEDs AND RESET SWITCH

EMM-E6 User’s Guide 1-33

1.11 LANVIEW LEDs AND RESET SWITCH

The EMM-E6 incorporates the Cabletron Systems LANVIEW Status

Monitoring and Diagnostics System. LANVIEW LEDs can help diagnose

any problems, such as a power failure or a cable fault. The module

includes the following LANVIEW LEDs:

• A CPU (Central Processing Unit) LED, for board status

• STBY (Standby), RCV (Receive), XMT (Transmit), and CLN

(Collision) LEDs for Ethernet Status

• Power LEDs for the two EPIM slots.

The front panel also has a reset switch which allows you to re-initialize

the processor. Chapter 14, Troubleshooting, provides detailed

descriptions of each EMM-E6 LANVIEW LED.

1.12 LANVIEWSECURE

The EMM-E6 supports the LANVIEWSECURE suite of Ethernet MMAC

modules. The LANVIEW

SECURE products support both inbound data

(Intruder Prevention) and outbound data (Eavesdrop Prevention). These

products are identiﬁed by the words “LANVIEW

SECURE” printed on the

faceplate of the product.

Intruder prevention allows ports on the modules to be conﬁgured with

expected MAC addresses. If a port receives a packet from a station or

device whose MAC address does not correspond to the one previously

associated with that port, the port will automatically lock, sensing the

presence of an unauthorized station, then generate and send a trap to the

Network Management station to indicate the intruder violation.

Eavesdrop prevention delivers a modiﬁed data portion (ﬁlled with a

random pattern of binary ones and zeroes) to all ports on the module

except the port speciﬁed in the original packet’s destination MAC address

ﬁeld. Effectively, all ports, except the destination port, recognize the

presence of a packet, but receive meaningless information.

CH1Book Page 33 Wednesday, March 20, 1996 7:48 AM