Step 4: Display Traffic from the Point of View of the Packet Forwarding Engine

Action

To display traffic from the point of view of the Packet Forwarding Engine, enter the following JUNOS CLI operational mode command:

user@host> show pfe statistics traffic

Sample Output 1

The following sample output was taken before packets were sent:

user@R2> show pfe statistics traffic    

PFE Traffic statistics:

               635392 packets input  (0 packets/sec)

               829862 packets output (0 packets/sec)

PFE Local Traffic statistics:

     579278 local packets input

     773747 local packets output

          0 software input high drops

          0 software input medium drops

          0 software input low drops

          1 software output drops

          0 hardware input drops

PFE Local Protocol statistics:

          0 hdlc keepalives

          0 atm oam

          0 fr lmi

     254613 ppp lcp/ncp

          0 ospf hello

          0 rsvp hello

     107203 isis iih

PFE Hardware Discard statistics:

          0 timeout

          0 truncated key

          0 bits to test

          0 data error

          0 stack underflow

          0 stack overflow

          0 normal discard

          0 extended discard

          0 invalid iif

          0 info cell drops

          0 fabric drops

Sample Output 2

The following sample output was taken after 100 packets were sent to router R2:

user@R2> show pfe statistics traffic    

PFE Traffic statistics:

               635595 packets input  (2 packets/sec)

               829990 packets output (2 packets/sec)

PFE Local Traffic statistics:

     579373 local packets input

     773869 local packets output

          0 software input high drops

          0 software input medium drops

          0 software input low drops

          1 software output drops

          0 hardware input drops

PFE Local Protocol statistics:

          0 hdlc keepalives

          0 atm oam

          0 fr lmi

     254655 ppp lcp/ncp

          0 ospf hello

          0 rsvp hello

     107220 isis iih

PFE Hardware Discard statistics:

          0 timeout

          0 truncated key

          0 bits to test

          0 data error

          0 stack underflow

          0 stack overflow

        100 normal discard

          0 extended discard

          0 invalid iif

          0 info cell drops

          0 fabric drops

What It Means

The sample output shows the number and rate of packets entering and leaving the Packet Forwarding Engine. For example, the 100 packets sent to R2 were discarded due to a route that had a discard next hop configured, as shown in the PFE Hardware Discard statistics field. All counters increased as a result of the 100 packets.