Verifying Your Work

To verify that SCU is functioning properly in the Layer 3 VPN, use the following commands:

• show interfaces interface-name statistics
• show interfaces source-class source-class-name interface-name
• show interfaces interface-name (extensive | detail)
• show route (extensive | detail)
• clear interface interface-name statistics

You should always verify SCU statistics at the outbound SCU interface on which you configured the output statement. To check SCU functionality, follow these steps:

1. Clear all counters on your SCU-enabled router and verify they are empty.
2. Send a ping from the ingress CE router to the second CE router to generate SCU traffic across the SCU-enabled VPN route.
3. Verify that the counters are incrementing correctly on the outbound interface.

The following section shows the output of these commands used with the configuration example.

user@pe2> show interfaces so-0/0/0.0 statistics
  Logical interface so-0/0/0.0 (Index 6) (SNMP ifIndex 113) 
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                      GOLD1                          0                    0
      Addresses, Flags: Is-Preferred Is-Primary

user@pe2> show interfaces source-class GOLD1 so-0/0/0.0    
    Protocol inet
      Source class                             Packets                Bytes
                      GOLD1                          0                    0

user@ce1> ping 10.20.253.2 source 10.114.1.1 rapid count 10000

user@scu>  show interfaces source-class GOLD1 so-0/0/0.0
    Protocol inet
      Source class                             Packets                Bytes
                       GOLD1                      20000              1680000

user@scu>  show interfaces so-0/0/0.0 statistics
  Logical interface so-0/0/0.0 (Index 6) (SNMP ifIndex 113) 
    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
    Protocol inet, MTU: 4470
      Source class                             Packets                Bytes
                       GOLD1                      20000              1680000
      Addresses, Flags: Is-Preferred Is-Primary
         Destination: 10.20.253/24, Local: 10.20.253.1