Juniper JUNOSE 11.2, Configuration Manual

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•
You configure new IP, MPLS, or PPPoE interfaces after you issue the bridge crb
command to enable concurrent routing and bridging.
• The IP, MPLS, or PPPoE interface is the first occurrence of this protocol in the bridge
group.
For example, assume that you want to route (rather than bridge) IP, MPLS, and PPPoE
interfaces, but only IP and MPLS interfaces are configured when you issue the
bridge 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 483 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
Copyright © 2010, Juniper Networks, Inc. 484
JunosE 11.2.x Link Layer Configuration Guide