Verilink 9000 Series (34-00271) Product Manual - Manual (Page 305)

Bridge Applications 283
Option B - Flush Frame With Multicast Address Destination. Setting this option
prevents the port from forwarding multicast messages to other LANs. This reduces
the load on the WAN connection when every LAN has its own multicast address.
Option C - Flush Frame With Broadcast Address Destination. Setting this option
prevents the port from forwarding broadcast messages to other LANs. This reduces
the load on the WAN connection when every LAN has its own broadcast address.
Option D - Tunnel. This option applies to only remote bridges and is used to
connect a MultiPro bridge to a device that does not support another TXPORT
device bridge. This device can participate in the spanning tree algorithm but
instead of being connected via a LAN, it is connected to the MultiPro unit via a
WAN connection. This implies that the device removes the WAN protocol envelope
and analyzes the remaining part of the message as if it had been received from a
LAN.
Bridge
Applications Figure 17-4 depicts three units connected via public frame relay. Units 002 and 003
do not have a direct logical connection, however, they can still communicate by
having unit 001 switch their frames.
DOWNLOAD CONFIG MODE BACKUP NET ALARM POWER
PRISM 9111 T R A N S P O R T
®
Unit 001
Bridgename = 001LAN
DOWNLOAD CONFIG MODE BACKUP NET ALARM POWER
PRISM 9111 T R A N S P O R T
®
Unit 002
Bridgename = 002LAN
DOWNLOAD CONFIG
MODE BACKUP NET ALARM POWER
PRISM 9111 T R A N S P O R T
®
Unit 003
Bridgename = 003LAN
DLCI 16
DLCI 16
DLCI 16
DLCI 17
Frame Relay
Figure 17-4 Three Units Connected through the Public Frame Relay Network