[c-nsp] Cisco 9k TenGig interface Output drops

[Simon Allard]

Thank you for that.

Pointed at this counter incrementing.

RESOLVE_L2L3_QOS_C_DROP_CNT

Now to find out why!




From: Darin Herteen [mailto:synack at live.com] 
Sent: Monday, 9 June 2014 1:46 p.m.
To: Simon Allard; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] Cisco 9k TenGig interface Output drops

Locate the NP that handles Te0/1/0/3 by :

show controllers np ports all

then:

show controllers np counters npx location 0/1/CPUx

The following are some helpful links:

https://supportforums.cisco.com/document/110671/asr9000xr-np-counters-explained-xr421
https://supportforums.cisco.com/document/59721/asr9000xr-troubleshooting-packet-drops-and-understanding-np-drop-counters

For Typhoon line cards your order of processing is :

Parse -> Search -> Resolve -> - Modify -> Queue Schedule

Happy hunting !

Darin





> From: Simon.Allard at team.orcon.net.nz
> To: cisco-nsp at puck.nether.net
> Date: Mon, 9 Jun 2014 00:25:35 +0000
> Subject: [c-nsp] Cisco 9k TenGig interface Output drops
> 
> Hi Guys
> 
> I have a Cisco 9k (IOS XR), out of the blue we have started to see output drops on one of our 10Gig interfaces, and we are stumped to why.
> 
> I have checked the QoS rules (show policy-map interface Te0/1/0/3) and I am not seeing any drops, and the interface is not showing any errors (other than the drop counter).
> 
> The interface is not close to saturation, as noted by the TX/RX load counters. (It's a 10Gig circuit).
> 
> Does anyone have any more ideas on where to check?
> 
> RP/0/RSP0/CPU0:AVL-9006-1#show interfaces Te0/1/0/3
> Mon Jun 9 12:20:30.637 NST
> TenGigE0/1/0/3 is up, line protocol is up
> Interface state transitions: 1
> Hardware is TenGigE, address is d867.d933.713b (bia d867.d933.713b)
> Layer 1 Transport Mode is LAN
> Description: To JAD-9006-1 Ten0/1/0/3 [cct description here]
> Internet address is 10.111.252.21/30
> MTU 9200 bytes, BW 10000000 Kbit (Max: 10000000 Kbit)
> reliability 255/255, txload 71/255, rxload 17/255
> 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 2d04h
> 30 second input rate 683789000 bits/sec, 246805 packets/sec
> 30 second output rate 2800879000 bits/sec, 313047 packets/sec
> 43078016592 packets input, 16596075514641 bytes, 170 total input drops
> 0 drops for unrecognized upper-level protocol
> Received 0 broadcast packets, 43093 multicast packets
> 0 runts, 0 giants, 0 throttles, 0 parity
> 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
> 56873325966 packets output, 64034079075262 bytes, 3306387 total output drops
> Output 0 broadcast packets, 43123 multicast packets
> 0 output errors, 0 underruns, 0 applique, 0 resets
> 0 output buffer failures, 0 output buffers swapped out
> 0 carrier transitions
> 
> 
> 
> Cheers,
> Simon
> 
> 
> 
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