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Webcast-Catalyst9k
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CISCO CRS-3 XR Input drops

Hello Engineers !

I have a trouble, please help me!

CRS3 router,  on a interface constantly increase  the log counter with input drops.

An ACL is set up  on ingress traffic, but I can't understand that these drops are caused by this ACL

or the other issue like "Input drop invalid DMAC"  ???

The "Input drop invalid DMAC" counter may be caused by ACL or is independently ?

some logs:

#show controllers tenGigE 0/3/0/3 stats

    ...................................................

    Input drop overrun          = 0

    Input drop abort            = 0

    Input drop invalid VLAN     = 522

    Input drop invalid DMAC     = 268246022 <--  this counter is permanently increasing

    Input drop invalid encap    = 535

    Input drop other            = 0

    ....................................................

#show inter tenGigE 0/3/0/3 

TenGigE0/3/0/3 is up, line protocol is up

  Interface state transitions: 73

  Hardware is TenGigE, address is ccef.4806.5913 (bia ccef.4806.5913)

  Description: -=..=-

  Internet address is x.x.x.y/z

  MTU 1514 bytes, BW 10000000 Kbit (Max: 10000000 Kbit)

     reliability 255/255, txload 17/255, rxload 61/255

  Encapsulation ARPA,

  Full-duplex, 10000Mb/s, LR, link type is force-up

  output flow control is off, input flow control is off

  loopback not set,

  ARP type ARPA, ARP timeout 04:00:00

  Last input 00:00:00, output 00:00:00

  Last clearing of "show interface" counters never

  30 second input rate 2427523000 bits/sec, 268038 packets/sec

  30 second output rate 678844000 bits/sec, 248055 packets/sec

     5093582885272 packets input, 5130974626716135 bytes, 268269878 total input drops <-- constantly in progress ...

     4542 drops for unrecognized upper-level protocol           

     Received 1085657977 broadcast packets, 4081267618 multicast packets

              17 runts, 46 giants, 0 throttles, 0 parity

    525 input errors, 429 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort    <--- These counters are not changing

     4258307831768 packets output, 1555089950242132 bytes, 52174 total output drops

     Output 43284 broadcast packets, 53314 multicast packets

     0 output errors, 0 underruns, 0 applique, 0 resets

     0 output buffer failures, 0 output buffers swapped out

     77 carrier transitions

............................................................................

interface TenGigE0/3/0/3

description -=:)=-

ipv4 address x.x.x.y 255.255.252.0

ipv6 nd suppress-ra

ipv6 address hhhh:hhhx::xhxh:xhxh:1/64

ipv6 enable

load-interval 30

flow ipv4 monitor  sampler WANMONITOR ingress

ipv4 access-group FILTRU-IN ingress

.............................................................................

#show access-lists hardware ingress drop-count interface tenGigE 0/3/0/3 location 0/3/CPU0

Tue Dec 10 09:34:05.833 EET

Total acl drops : 1275068025 <-- very different from the total input drops

Thanks!

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