What is the "ingress over sub drops" counter // ASR1000?

[kissge]

Hello,

can you tell me what is the "ingress over sub drops" counter in the following output (ASR1004, 15.2(2)S1)?

asr#show controllers

<...>

TenGigabitEthernet0/1/0

     21830397 input vlan errors

     7712082 ingress over sub drops

     18 Number of sub-interface configured

<...>

Thank you,

best regards,

Gergely

[ngoldwat · Accepted solution]

Hi Gergely,

"ingress over sub drops" - Hardware drop pkt counters related to traffic over-subscription.  It accounts for pkts dropped when the Gig E ports are overwhelmed with more than 1 Gig of ingress traffic.

Thanks.

[kissge]

Hello,

thank you for your reply!

This is a tengig interface which is not likely to oversubscribe (typical traffic rate is below 2.5 Gbps) however there could be some bursty traffic concerning this counter.

There is no input queue drop on the interface - I wonder if the "input queue drop" related to "ingress over sub drops"?

Best regards,

Gergely

     asr#sh int ten 0/1/0 controller

     TenGigabitEthernet0/1/0 is up, line protocol is up

       Hardware is SPA-1X10GE-L-V2, address is a493.4cd0.c510 (bia a493.4cd0.c510)

       MTU 9216 bytes, BW 10000000 Kbit/sec, DLY 10 usec,

          reliability 255/255, txload 1/255, rxload 60/255

       Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set

       Keepalive not supported

       Full Duplex, 10000Mbps, link type is force-up, media type is 10GBase-SR

       output flow-control is on, input flow-control is on

       ARP type: ARPA, ARP Timeout 04:00:00

       Last input 00:00:00, output 00:01:29, output hang never

       Last clearing of "show interface" counters never

       Input queue: 0/375/0/0 (size/max/drops/flushes); Total output drops: 195

       Queueing strategy: fifo

       Output queue: 0/40 (size/max)

       30 second input rate 2371308000 bits/sec, 218149 packets/sec

       30 second output rate 2000 bits/sec, 4 packets/sec

          295771623646 packets input, 401390419037397 bytes, 0 no buffer

          Received 17352252 broadcasts (294214973196 IP multicasts)

          0 runts, 0 giants, 0 throttles

          0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

          0 watchdog, 2559103491 multicast, 0 pause input

          205479375 packets output, 266095482233 bytes, 0 underruns

          0 output errors, 0 collisions, 2 interface resets

          0 unknown protocol drops

          0 babbles, 0 late collision, 0 deferred

          0 lost carrier, 0 no carrier, 0 pause output

          0 output buffer failures, 0 output buffers swapped out

     TenGigabitEthernet0/1/0

          21831585 input vlan errors

          7712082 ingress over sub drops

          18 Number of sub-interface configured

     asr#

[ngoldwat · Accepted solution]

It has more to do with Ingress PriorityScheduling, low priority traffic will be dropped first.

show platform hardware interface TenGigabitEthernet0/1/0 plim qos input map

sh int TenGigabitEthernet0/1/0 controller | i rate

sh int TenGigabitEthernet0/1/0 controller | i over

I hope this helps.  Its about all I've got

[kissge]

Thank you for your answer!

Best regards,

Gergely