show interfaces

[alexis41]

Amigos una consulta. Por qué existen diferencias en el comando show interfaces sobre los drops de encolamiento?
He visto estás diferencias.

1.- caso

Total output drops: ?
Output queue: 0/100/0 (size/max total/drops)

2- caso

Total output drops: ?
Output queue:0/40(size/max)

En el primer caso, a qué se debe que haya 2 output drops y que significan?

Aunque me parece que es por Qos, ya que la primero interface se basa en politicas y el segundo en fifo, agradeceré que alguien me pueda aclarar.

Muchas gracias de antemano.

[balaji.bandi]

as per the output, there is no Drops, you need to post the real output to understand the drops.

here is the good explanation of drops :

https://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/6343-queue-drops.html

[alexis41]

Hola Balaji,

Cuál sería la diferencia entre los 2 parámetros drops(Total output drops y Output queue) que se encuentran remarcados en la imagen?

Router1#show interface Serial0/0/0

Serial0/0/0 is up, line protocol is up 
  
  MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec, 
     reliability 255/255, txload 69/255, rxload 43/255
  Encapsulation HDLC, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:02, output 00:00:00, output hang never
  Last clearing of "show interface" counters 01:28:49
  Input queue: 76/75/5553/0 (size/max/drops/flushes);
     Total output drops: 1760
  Queueing strategy: Class-based queueing
  Output queue: 29/1000/64/1760 (size/max total/threshold/drops) 
     Conversations  7/129/256 (active/max active/max total)
     Reserved Conversations 4/4 (allocated/max allocated)
     Available Bandwidth 1289 kilobits/sec

Muchas gracias de antemano.

[balaji.bandi]

what router is this ? what model ? can you post show version ?

the document i have refer have some tuning tips if you get chance look.

also clear the counters and see how fast they increasing ?

[alexis41]

Hola Balaji,

Mi consulta, básicamente, es interpretar el resultado. No sé a cual de los 2 parámetros puedo considerarlo como drop por encolamiento a Total output drops o Output queue ?

He buscado información pero no he encontrado.

ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters 6d11h
Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 67
Queueing strategy: Class-based queueing
Output queue: 0/1000/0 (size/max total/drops)
30 second input rate 2000 bits/sec, 5 packets/sec
30 second output rate 3000 bits/sec, 5 packets/sec
137818 packets input, 14954719 bytes, 0 no buffer
Received 4986 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 4986 multicast, 0 pause input
0 input packets with dribble condition detected
178820 packets output, 22038954 bytes, 0 underruns
0 output errors, 0 collisions, 0 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

Gracias de antemano.

[balaji.bandi]

Input queue: 1/75/0/0 (size/max/drops/flushes); Total output drops: 67

Other than 67 drops i do not see any major issue here, until you see any performance issue, we can deep look, if not i ignore this. (until they increase very high)