[j-nsp] [SRX650] show pfe statistics weirdness

[Nick Kritsky]

Hello,

There is something I don't understand.
There is a SRX650 running BFD for OSPF sessions. BFD is working, however I
wanted to make sure that it is processed in PFE.
All counters of "show pfe statistics traffic protocol bfd" are zero, but
BFD-related counters of "show pfe statistics traffic" are on-zero and
increasing. What might be the reason of such difference?

thanks
Nick

OS: 10.4R4.5
BFD is running on ge-0/0/1

Here is the output of "show pfe statistics traffic protocol bfd":
BFD protocol statistics:
    Packets with invalid interface         : 0
    Packets with invalid address family    : 0
    Packets with bad IP checksum           : 0
    Packets with bad IP options            : 0
    Packets with bad IP length             : 0
    Packets with bad udp checksum          : 0
    Packets with bad udp length            : 0
    Packets with bad udp ports             : 0
    Packets with no logical interface      : 0
    Packets with prefix length mismatch    : 0
    Packets received                       : 0
    Packets absorbed                       : 0
    Packets failed to transmit             : 0
    Packets receive failures               : 0
    Packets allocation failures            : 0

And here is the output of "show pfe statistics traffic":
Packet Forwarding Engine traffic statistics:
    Input  packets:          53237611735                 5350 pps
    Output packets:          80428514254                 7630 pps
Packet Forwarding Engine local traffic statistics:
    Local packets input                 :             38162325
    Local packets output                :             37968315
    Software input control plane drops  :                    0
    Software input high drops           :                    0
    Software input medium drops         :                 1088
    Software input low drops            :                    0
    Software output drops               :                    0
    Hardware input drops                :                    0
Packet Forwarding Engine local protocol statistics:
    HDLC keepalives            :                    0
    ATM OAM                    :                    0
    Frame Relay LMI            :                    0
    PPP LCP/NCP                :                    0
    OSPF hello                 :              1434683
    OSPF3 hello                :                    0
    RSVP hello                 :                    0
    LDP hello                  :                    0
    BFD                        :             26625331
    IS-IS IIH                  :                    0
    LACP                       :                    0
    ARP                        :              7093341
    ETHER OAM                  :                    0
    Unknown                    :                    0
Packet Forwarding Engine hardware discard statistics:
    Timeout                    :                    0
    Truncated key              :                    0
    Bits to test               :                    0
    Data error                 :                    0
    Stack underflow            :                    0
    Stack overflow             :                    0
    Normal discard             :             20239282
    Extended discard           :                    0
    Invalid interface          :                    0
    Info cell drops            :                    0
    Fabric drops               :                    0
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU
Error statistics:
    Input Checksum             :                    0
    Output MTU                 :                    0