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• Configuring Virtual Switches as Separate Routing Instances on page 40
Configuring Virtual Switches as Separate Routing Instances
You can configure two virtual switches as separate routing instances on an MX Series
router with bridge domains and VLANs.
Beforeyoubegin,youshouldhavealreadyconfiguredabasicbridgedomainenvironment.
For a general description of a basic bridge domain environment, see “Layer 2 Features
for a Bridging Environment” on page 21. For an example of a basic bridge domain
configuration, see “Example Roadmap: Configuring a Basic Bridge Domain Environment”
on page 22. More detailed examples are also provided for the four features generally
required in a Layer 2 environment:
•
Interfaces and VLAN tags required.
•
Bridge domains required by the topology.
•
Spanning tree protocols required by the topology.
•
Integrated bridging and routing required by the topology.
At the end of this configuration, you create two virtual switches as separate routing
instances to separate the VLANs and broadcast domains. Because the same VLAN ID
can be used in multiple switched networks, virtual switches can keep each VLAN and
broadcast domain logically separated.
To configure two virtual switches as separate routing instances:
1.
The following statements configure the first virtual switch in a routing instance.
[edit]
routing-instances {
virtual-switch-1 {
instance-type virtual-switch;
...virtual-switch-1 configuration with one STP/VLAN ID set...
}
}
2.
The following statement configure the second virtual switch in a different routing
instance.
[edit]
routing-instances {
virtual-switch-2 {
instance-type virtual-switch;
...virtual-switch-2 configuration with another STP/VLAN ID set...
}
}
This is not a complete configuration.
For more information about configuring virtual switches, see the Junos OS Layer 2
Configuration Guide.
Copyright © 2010, Juniper Networks, Inc.40
Junos 10.4 MX Series Ethernet Services Routers Solutions Guide