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OutDiscards on ME-3400 uplink

narinder.thakur
Level 1
Level 1

Hi all,

Can anyone advise why packet discard on Me-3400 switch interface and how to prevent.

ME-3400#sh interfaces counters errors                      

Port        Align-Err     FCS-Err    Xmit-Err     Rcv-Err  UnderSize  OutDiscards 

Fa0/22              0           0           0           0          0            0 
Fa0/23              0           0           0           0          0            0 
Fa0/24              0           0           0           0          0            0 
Gi0/1               0           0           0           0          0      1295422 
Gi0/2               0           0           0           0          0            0 
ME-3400#show platform port-asic stats drop gigabitEthernet 0/1

  Interface Gi0/1 TxQueue Drop Statistics
    Queue 0
      Weight 0 Frames 0
      Weight 1 Frames 0
      Weight 2 Frames 0
    Queue 1
      Weight 0 Frames 0
      Weight 1 Frames 0
      Weight 2 Frames 0
    Queue 2
      Weight 0 Frames 0
      Weight 1 Frames 0
      Weight 2 Frames 0
    Queue 3
      Weight 0 Frames 0
      Weight 1 Frames 0
      Weight 2 Frames 17597741

Regards,

 

8 Replies 8

Leo Laohoo
Hall of Fame
Hall of Fame

Can you please post the complete output to the following commands: 

 

1.  sh interface Gi0/1; and

2.  sh controller e Gi0/1 

Hi Please see the below output 

ME-3400#sh int g0/1
GigabitEthernet0/1 is up, line protocol is up (connected) 
  Hardware is Gigabit Ethernet, address is 001d.e55a.9404 (bia 001d.e53a.9404)
  Description: Uplink to ONS node, Ring1
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec, 
     reliability 255/255, txload 1/255, rxload 14/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, link type is auto, media type is 100BaseFX-FE SFP
  input flow-control is off, output flow-control is unsupported 
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:00, output 8w0d, output hang never
  Last clearing of "show interface" counters 18:07:29
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 1295422
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 5744000 bits/sec, 534 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     16868359 packets input, 20999750940 bytes, 0 no buffer
     Received 1895959 broadcasts (1895959 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1895959 multicast, 0 pause input
     0 input packets with dribble condition detected
     2867264 packets output, 3878717837 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     4470 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


ME-3400#sh controllers ethernet-controller gigabitEthernet 0/1

     Transmit GigabitEthernet0/1              Receive
   3301720825 Bytes                       2155090175 Bytes                    
    238880299 Unicast frames              2021694196 Unicast frames           
      6271171 Multicast frames            1903506910 Multicast frames         
           19 Broadcast frames                 28204 Broadcast frames         
            0 Too old frames              2926964617 Unicast bytes            
            0 Deferred frames              816797850 Multicast bytes          
            0 MTU exceeded frames            1805056 Broadcast bytes          
            0 1 collision frames                   0 Alignment errors         
            0 2 collision frames                   0 FCS errors               
            0 3 collision frames                   0 Oversize frames          
            0 4 collision frames                   0 Undersize frames         
            0 5 collision frames                   0 Collision fragments      
            0 6 collision frames       
            0 7 collision frames                 771 Minimum size frames      
            0 8 collision frames           743915968 65 to 127 byte frames    
            0 9 collision frames          1269583754 128 to 255 byte frames   
            0 10 collision frames            3820879 256 to 511 byte frames   
            0 11 collision frames                 99 512 to 1023 byte frames  
            0 12 collision frames         1907907839 1024 to 1518 byte frames 
            0 13 collision frames                  0 Overrun frames           
            0 14 collision frames                  0 Pause frames             
            0 15 collision frames      
            0 Excessive collisions                 0 Symbol error frames      
            0 Late collisions                      0 Invalid frames, too large
            0 VLAN discard frames                  0 Valid frames, too large  
            0 Excess defer frames                  0 Invalid frames, too small
           14 64 byte frames                       0 Valid frames, too small  
     31815139 127 byte frames          
    113920103 255 byte frames                      0 Too old frames           
        22109 511 byte frames                      0 Valid oversize frames    
        31738 1023 byte frames                     0 System FCS error frames  
     99362383 1518 byte frames                     0 RxPortFifoFull drop frame
            3 Too large frames         
            0 Good (1 coll) frames     
            0 Good (>1 coll) frames    

How big is your WAN link?

Its a 1g links, i want to now only why packet drop.. Is it normal ? 

 

 

QOS config is below.

Class-map match-any output-ABC-network
  match qos-group 3
  match ip precedence 6 
class-map match-all output-video
  match qos-group 1
class-map match-all output-A
  match qos-group 2
!
policy-map input-ABC
 class class-default
   set qos-group 3
policy-map input-video
 class class-default
   set qos-group 1
policy-map POLICE
 class output-ABC-network
    bandwidth percent 47
 class output-A
    bandwidth percent 10
 class output-video
    shape average 33000000
 class class-default
    shape average 10000000
policy-map input-A
 class class-default
   set qos-group 2


Class-map: class-default (match-any)
      4209914 packets
      Match: any 
        Output Queue: 
          Max queue-limit default threshold: 160 
          Tail Packets Drop: 1295422 
      Traffic Shaping
        Average Rate Traffic Shaping
        CIR 10000000 (bps)
      Output Queue: 
        Max queue-limit default threshold: 160 
        Tail Packets Drop: 1295422

 


Policy apply in interface (POLICE)

Same thing policy map apply on link2 as well but link two no drops. 

Hi ,

 

Could you please paste the complete output of sh poilicy-map interface gi0/1

 

Thanks,

Madhu

sh policy-map interface gigabitEthernet 0/1
 GigabitEthernet0/1 

  Service-policy output: outpol

    Class-map: A (match-any)
      143793 packets
      Match: qos-group 3
      Match: ip precedence 6 
        Bandwidth percent 47    (47000000 bps)
      Output Queue: 
        Max queue-limit default threshold: 160 
        Tail Packets Drop: 0 

    Class-map: B (match-all)
      291045 packets
      Match: qos-group 2
        Bandwidth percent 10    (10000000 bps)
      Output Queue: 
        Max queue-limit default threshold: 160 
        Tail Packets Drop: 0 

    Class-map: C (match-all)
      113475 packets
      Match: qos-group 1
      Traffic Shaping
        Average Rate Traffic Shaping
        CIR 33000000 (bps)
      Output Queue: 
        Max queue-limit default threshold: 160 
        Tail Packets Drop: 0 

    Class-map: class-default (match-any)
      13369375 packets
      Match: any 
        Output Queue: 
          Max queue-limit default threshold: 160 
          Tail Packets Drop: 2773117 
      Traffic Shaping
        Average Rate Traffic Shaping
        CIR 10000000 (bps)
      Output Queue: 
        Max queue-limit default threshold: 160 
        Tail Packets Drop: 2773117 

Its a 10g links, i want to now only why packet drop.. Is it normal ? 

There must be some kind of mistake.  It can't be 10 Gbps links because Gi0/1 is only 100BaseFx.  

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