[j-nsp] Destination Class Accounting: counters are zero

[Alexander Shikoff]

Hello List,

I have MX240 router (10.0 R4.7) with two peering links and two upstream links.
I need separate accounting of customer's traffic: to/from upstreams and 
to/from peerings.
I configured an SCU input accounting on peering and upstream links,
DCU and SCU output accounting on customer's link:

minotaur at br1-gdr.ki# show interfaces ae0 unit 753 
vlan-id 753;
family inet {
    accounting {
        source-class-usage {
            output;
        }
        destination-class-usage;
    }
    no-redirects;
    filter {
        output bw-100M-U;
    }
    address 109.68.41.133/30;
}


Then I applied export policy to forwarding table, now every route
has an assigned class, for example:

minotaur at br1-gdr.ki# run show route juniper.net table Salt extensive | match class
Destination class: to-Upstream
Source class: from-Upstream


Now let's check extensive information about customer's interface:
minotaur at br1-gdr.ki# run show interfaces ae0.753 extensive                                                                                                           
  Logical interface ae0.753 (Index 97) (SNMP ifIndex 197) (Generation 168)
    Description: Downstream: Digital Screens Kurenevka
    Flags: SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.753 ]  Encapsulation: ENET2
    Statistics        Packets        pps         Bytes          bps
    Bundle:
        Input :    1355645712      10824 1744298393787    125788672
        Output:     676249013       3535   50730352637      1954232
    Link:
      ge-2/0/5.753
        Input :    1355645712      10824 1744298393787    125788672
        Output:     676249013       3535   50730352637      1954232
    Marker Statistics:   Marker Rx     Resp Tx   Unknown Rx   Illegal Rx
      ge-2/0/5.753               0           0            0            0
    Protocol inet, MTU: 1500, Generation: 198, Route table: 6
      Flags: No-Redirects, DCU, SCU-out
                                               Packets                Bytes
      Destination class            (packet-per-second)    (bits-per-second)

                         to-Other              1966210            997515326
                                  (                  9) (              4129)
                       to-Peering               904424           1216778711
                                  (               2932) (          32529971)
                      to-Upstream                    0                    0
                                  (                  0) (                 0)
                                               Packets                Bytes
      Source class                 (packet-per-second)    (bits-per-second)

                       from-Other                88128              5568059
                                  (                  0) (                53)
                     from-Peering               534506             37189579
                                  (               1136) (            664770)
                    from-Upstream                16017              1066310
                                  (                 97) (             49421)
      Output Filters: bw-100M-U-ae0.753-o,
      Addresses, Flags: Is-Preferred Is-Primary
        Destination: 109.68.41.132/30, Local: 109.68.41.133, Broadcast: 109.68.41.135, Generation: 177
    Protocol multiservice, MTU: Unlimited, Generation: 199, Route table: 6
      Policer: Input: __default_arp_policer__


Why 'to-Upstream' counters are zeroes?
Thanks in advance!

-- 
MINO-RIPE