Cabletron Systems EMM-E6 Ethernet - Manual (Page 45)

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 LANVIEW SECURE
The EMM-E6 supports the LANVIEW SECURE 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