Configuring Routed Interface

Step 1 Configure reserved VLAN for the use of routed interface.

set vlans reserved-vlan <reserved-vlan>

Step 2 Enable Ethernet port as a layer 3 routed interface.

set interface gigabit-ethernet <interface-name> routed-interface enable <true | false>

set interface gigabit-ethernet <interface-name> routed-interface name <string>

Step 3 Run the following command to bring up the parent routed interface. Only after this, the corresponding sub-interfaces can be used normally.

set l3-interface routed-interface <interface-name>

Step 4 Enable IP routing to perform layer 3 forwarding.

set ip routing enable true

Step 5 Commit the configuration.

commit

Configuring Sub-interface

Step 1 Configure the VLAN.

set vlans vlan-id <vlan-id>

Step 2 Create sub-interface and configure its IP address.

set interface gigabit-ethernet <interface-name> routed-interface sub-interface <sub-interface-name> vlan-id <vlan-id>

set l3-interface routed-interface <interface-name> address <ip-address> prefix-length <prefix-number>

Step 3 Commit the configuration.

commit

(Optional) Other Settings for Routed Interface and Sub-interface

Step 1 Configure the CPU egress rate limit for the routed interfaces and sub-interfaces.

set l3-interface routed-interface <interface-name> rate-limit <rate-limit>

Step 2 Configure the MTU for the routed interfaces. It is not supported to configure MTU on the sub-interfaces. The sub-interfaces use the MTU value configured on the parent interface.

set l3-interface routed-interface <interface-name> mtu <mtu-value>

Step 3 Bind the routed interface and sub-interface to the VRF.

set l3-interface routed-interface <interface-name> vrf <vrf-name>

Step 4 Commit the configuration.

commit

Checking the Configuration

Run the command run show vlans routed-vlan to check the VLAN information of the routed interfaces and sub-interfaces.
Run the command run show interface routed-interface brief to check the brief interface information of the routed interfaces and sub-interfaces.
Run the command run show l3-interface routed-interface <interface-name> to check the detailed layer 3 interface information of a specific routed interface or sub-interface.

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