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Configuring SCU on a Virtual Loopback Tunnel Interface
To configure source class usage on the virtual loopback tunnel interface, perform the tasks described in the following sections:
Example: Configuring a Virtual Loopback Tunnel Interface on a Provider Edge Router Equipped with a Tunnel PIC
Define a virtual loop interface on a provider edge router with a Tunnel PIC:
[edit interfaces]vt-0/3/0 {unit 0 {family inet {accounting {source-class-usage {input;}}}}}
Example: Mapping the VRF Instance Type to the Virtual Loopback Tunnel Interface
Map the VRF instance type to the virtual loopback tunnel interface:
[edit]routing-instances {VPN-A {instance-type vrf;interface at-2/1/1.0;interface vt-0/3/0.0;route-distinguisher 10.255.14.225:100;vrf-import import-policy-name;vrf-export export-policy-name;protocols {bgp {group to-r4 {local-address 10.27.253.1;peer-as 400;neighbor 10.27.253.2;}}}}}
 | Note: For SCU and DCU to work, do not include the vrf-table-label statement at the [edit routing-instances instance-name] hierarchy level. |
Example: Sending Traffic Received from the Virtual Loopback Interface Out the Source Class Output Interface
Send traffic received from the virtual loopback tunnel interface out of the source class output interface:
[edit interfaces]at-1/1/0 {unit 0 {family inet {accounting {source-class-usage {output;}}}}}
For more information about configuring source class usage on the virtual loopback tunnel interface, see the Junos® OS Network Interfaces.
