Layer 2 Learning and Forwarding on Logical Systems
Logical Systems enables you to configure Layer 2 MAC address and VLAN learning and forwarding properties in support of Layer 2 bridging. For more information, see the following topics:
Layer 2 Learning and Forwarding in a Logical System Overview
You can partition a single physical router into multiple logical devices called logical systems that perform independent routing tasks. Logical systems perform a subset of the actions of a physical router and have their own unique routing tables, interfaces, policies, and routing instances. On MX Series routers only, you can enable Layer 2 learning and forwarding in a logical system for bridge domains or other virtual-switch routing instances.
When enabling Layer 2 learning and forwarding in a logical system for bridge domains or other virtual-switch routing instances, the following guidelines apply:
You can only configure 16 logical systems.
Logging is performed for the entire device and not per logical system.
You cannot restart Layer 2 learning for an individual logical system.
See Also
Enabling Layer 2 Learning and Forwarding in a Logical System
On MX Series router, you can enable Layer 2 learning and forwarding in a logical system for bridge domains or other virtual-switch routing instances.
Before you begin, configure the interfaces for the logical system.
To configure Layer 2 learning and forwarding in a logical system for bridge domains or other virtual-switch routing instances:
See Also
Example: Configuring Layer 2 Learning and Forwarding and RSTP in a Logical System
The following example configures a logical system and routing instance with its own bridge domain (bd1), switch options, and spanning- tree protocol (rstp).
[edit]
interfaces {
ge-5/0/1 {
flexible-vlan-tagging;
}
}
logical-systems {
logical-sys1 {
interfaces {
ge-5/0/1 {
unit 0 {
family bridge {
interface-mode trunk;
vlan-id-list 1–5;
}
}
unit 3 {
family bridge {
interface-mode trunk;
vlan-id-list 11–15;
}
}
}
ge-5/0/2 {
unit 0 {
family bridge {
interface-mode trunk;
vlan-id-list 1–5;
}
}
}
}
routing-instances {
routing-inst-1 {
interface ge-5/0/2;
instance-type virtual-switch;
bridge-domains {
vlan-id 1;
}
protocols {
rstp {
interface ge-5/0/2;
}
}
}
}
bridge-domains {
bd-1 {
vlan-id 1;
}
}
switch-options {
interface ge-5/0/1.3 {
interface-mac-limit {
1400;
packet-action drop;
}
}
}
protocols {
rstp {
interface ge-5/0/1;
}
}
}
}
This is not a complete router configuration.