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Required Configuration
15-2
Incoming LLC2 traffic that is destined for a terminated MAC address will be for-
warded to the node's internal LLC2 processes. Non-terminated LLC2 frames and all
other frames will be forwarded to the bridge.
Under the spanning tree concept, bridges automatically maintain forwarding tables via
exchange of messages with other bridges on the network, and determination of single
paths for traffic between endpoints (assuming there are multiple possible paths).
Each Bridge is identified by a Bridge ID, which is made up of a two-octet
ority—configured in
Bridge Node
node contains a LAN card, the 48-bit ID will be the MAC address of the first LAN
card to send its status (active/inactive). If there is no LAN card, an address will be
created automatically by the software.
Bridging is supported on Ethernet, Token Ring, and frame relay interfaces.
The interfaces used for Bridging in the FRM are the same as those used for
LLC2. When referring to Bridging, however, these interfaces will be called
"Bridge ports," since the IEEE 802.1d standard uses the term "port" to
identify a connection to a bridge.
Avoid configuring parallel Bridge/LLC2 frame relay links
between two FRM if one path is in native LLC2 format and the
other in some other format. Since native LLC2 interfaces do not
support the spanning tree protocol, a loop can be created,
causing a node failure.
To configure a Bridge in an FRM, make sure the following are properly configured in
the database:
Node
parameters, which is general configuration that must be done no matter
which protocols will be run in the node. See Chapter 4.
RLPs
that will contain the interface(s) to the user device(s), plus Line Interface
Card(s) supporting the ports that will be the interfaces. See Chapter 5.
Loaded
Protocol(s): Bridging, and the transport protocol: frame relay or X.25.
See Chapter 5.
LAN interface(s)
Frame relay port(s)
relay PVC. See Chapter 7 (frame relay) or Chapter 8 (X.25).
Bridge parameters, described later in this chapter.
Defaults—followed by a unique 48-bit ID. If the
that will connect to any attached LAN(s). See Chapter 5.
and/or
X.25 port(s)
that will connect to a network or frame
Frame Relay Module 4.0 User Guide, Rev 01
Bridge Pri-
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