Figure 13-1 Negotiating A Bridge Connection (Ppp Encapsulation); Establishing A Bridged Connection - Lucent Technologies MAX 6000 Configuration Manual

Establishing a bridged connection

A MAX unit uses station names and passwords to establish a bridging connection, as shown in
Figure 13-1.
Figure 13-1. Negotiating a bridge connection (PPP encapsulation)
Site A
Name=sitagw
Remote station=sitbgw
Send PW=*noknok*
Recv PW=*comein*
Bridging=yes
Note: The information exchange illustrated in Figure 13-1 differs slightly for Combinet
bridging, in which the bridges' MAC addresses are exchanged instead of station names, and
passwords can be configured as optional. Otherwise, the way in which the unit establishes a
Combinet bridge connection across the WAN is very similar to the PPP bridged connection in
Figure 13-1. For more information about Combinet, see Chapter 4, "Configuring Individual
WAN Connections."
The system name assigned to the unit by the Name parameter in the System > Sys Config
profile must exactly match the device name specified in the Connection profile on the remote
bridge, including case changes. Similarly, the name setting in the remote bridge's Sys Config
profile must exactly match the name specified by the Station parameter in the Connection
profile on the local unit, including case changes.
Note: The most common cause of trouble when initially setting up a PPP bridging connection
is specifying the wrong name for the MAX unit or the remote device. Errors often include not
specifying case changes or not entering a dash, space, or underscore.
Enabling bridging
A MAX unit has a systemwide Bridging parameter that you must enable for any bridging
connection to work. The Bridging parameter directs the unit's Ethernet controller to run in
promiscuous mode. In promiscuous mode, the Ethernet driver accepts all packets, regardless of
address or packet type, and passes them up the protocol stack for a higher-layer decision on
whether to route, bridge, or reject the packets. (Even if no packets are actually bridged, running
in promiscuous mode incurs greater processor and memory overhead than the standard mode
of operation for the Ethernet controller.)
You enable packet bridging by opening Ethernet > Mod Config and setting the Bridging
parameter to Yes:
MAX 6000/3000 Network Configuration Guide
Ethernet
MAX
Configuring Packet Bridging
Establishing a bridged connection
Ethernet
WAN
MAX
Site B
Name=sitbgw
Remote station=sitagw
Send PW=*comein*
Recv PW=*noknok*
Bridging=yes
13-3