Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Configuration Manual

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crb command. The router detects the IP and MPLS interfaces and issues implicit
bridge route commands to route these protocols.
If you subsequently add a new IP interface to a bridge group, you do not need to
issue the
bridge route command because the implicit bridge route command for IP
is still in effect. However, if you subsequently add a new PPPoE interface to the
bridge group, you must issue an explicit
bridge route command for PPPoE to direct
the bridge group to route PPPoE packets.
You can also use the bridge route command as a way to filter packets by routing. If
you issue an explicit bridge route command for a protocol that is not currently
configured in any of your bridge groups, the bridge group must route rather than
bridge that protocol, but does not have the required interface stacking to do so. As
a result, the bridge group discards (drops) those packets.
To configure explicit routing:
1.
Ensure that you have enabled concurrent routing and bridging. (See “Enabling
Concurrent Routing and Bridging” on page 486 for details.)
2.
From Global Configuration mode, enable routing of IP, MPLS, or PPPoE packets
in a specified bridge group.
host1(config)# bridge westford02 route ip
host1(config)# bridge westford02 route mpls
host1(config)# bridge westford03 route pppoe
3.
(Optional) Use the appropriate show command to verify that routing is enabled
for the specified protocols in the bridge group.
host1# show bridge westford02
bridge route
■
Use to enable the routing of IP, MPLS, or PPPoE packets in a specified bridge
group when concurrent routing and bridging (CRB) is enabled.
■
If you issue this command for a protocol that is not configured in any bridge
groups on your router, the bridge group discards (drops) those packets.
■
You must specify the alphanumeric name of the bridge group specified in the
bridge command.
■
Choose one of the following keywords to indicate the protocol type that the
bridge group routes:
ip , mpls , or pppoe .
■
Example
host1(config)# bridge westford02 route ip
■
Use the no version to disable routing of the specified protocol in the specified
bridge group.
■
See bridge route.
Configuration Tasks
■ 487
Chapter 15: Configuring Transparent Bridging