3Com CoreBuilder 9000, Руководство пользователя

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390 C
HAPTER
15: LAN E
MULATION
That is, the operator can select between the two options as shown in
Table 57.
.
Unknown Multicast
and Broadcast Frames
The LEC sends unknown, multicast and broadcast frames to the BUS for
distribution to other clients. The LE standard limits the amount of
unknown unicast frames sent to the BUS. The address resolution
mechanism is used during the initialization process to provide the ATM
address of the BUS for unknown, multicast, and broadcast traffic, and
connection management provides a point-to-point VCC over which to
send such frames. The BUS sets up a point-to-multipoint connection for
distributing the received frames to all the ELAN members. The BUS sends
all flooded unicast frames, broadcast, and multicast frames over its
Multicast Forward VCC.
LAN Emulation
Statistics Display
Statistics of network structure and message flow for LES, BUS, and LECS
can be displayed by management. For more information, see “Display
LAN Emulation Statistics” on page 299.
Table 57 LE_ARP Response Policies for Route Descriptors
Name Description
Reject Reject the LE_ARP request.
Forward Request Forward the LE_ARP request to all LECs in accordance with the
LE_ARP response policy.