Auto qos voip trust y auto qos trust

[athan1234]

Buenos días,

Tasas de transferencia inferiores activando el auto qos de ToIP y  auto qos trust en cisco 3560 o 3750 contra enlaces troncales contra equipos Cisco 6500 y 4500 .

¿Es normal que desacticando auto qos voip trust y auto qos trust se doblen las  velocidades de transferencias?

Un saludo

[Leonardo Pena Davila]

Hola Athan, no es comportamiento normal, lo primero que debes verificar es si en esas interfaces al activar AutoQoS exista descarte de paquetes  (drops). Con esta infromacion puedes pensar que algo esta fallanado en el encolamiento de paquetes que puede estar directamente relacionado con estos comandos. Han habido diferentes Bugs en estos modelos de switches (3750, 3560. 2960) con algunas versiones de sistemas operativos, quizas tu version tenga algun problema y solo debas actualizar el IOS.

Te dejo algunos enlaces con información :

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCee22591

https://quickview.cloudapps.cisco.com/quickview/bug/CSCts15086

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/116089-technote-switches-output-drops-qos-00.html

Bug Search Tool

Bug Search CSCee22591 Help  |  Feedback Auto-QoS doesnt enable priority queue CSCee22591 Description Problem: Auto-QoS on Cat3750 doesn't enable priority queuing. Condition: When configuring auto qos voip, the queuing mechanism used is Shaped Round Robin (SRR). Priority-queue is not enabled for auto qos voip. Analysis: Priority queuing on FE auto qos ports will process the voice traffic, but will also starve the rest of the queues. Shaping maintains the QoS for the voice traffic and protects other traffic, specifically where a misbehaving device sends a flood of traffic marked with voice DSCP/CoS. The auto qos feature is designed on each platform, based on their particular feature set and hw limitations. Therefore, the queuing mechanism supported on each platform may be different. Customer Visible Notifications Save Bug Open Support Case Was the description about this Bug Helpful? (0) Details Last Modified: Feb 22,2014 Status: Terminated Severity: 3 Moderate Product: (1) Cisco Catalyst 3750 Series Switches Known Affected Releases: (1) 12.1(19)EA1c Known Fixed Releases: (0) No release planned to fix this bug Download software for  Cisco Catalyst 3750 Series Switches Community Discussion on CSCee22591 - Cisco Support Community 2 Discussion(s) Priority Queue I have a Cisco Catalyst 2960 with IOS Release12.2(53)SE (because of a contract I can not update it) ->� the release notes for this version describe the following: When auto-QoS is enabled on the switch, priority� queuing is not enabled. Instead, the switch uses shaped round robin� (SRR) as the queuing mechanism. The auto-QoS feature is designed on each� platform based on the feature set and hardware limitations, and the� queuing mechanism supported on each platform might be different. There� is no ... Author:h.zelenka | Posted:February 21, 2012 | Latest activity:March 31, 2013 AutoQoS on Catalyst 3750 LAN switches I'm a bit perplexed why the AutoQoS macro does not implement "priority-queue out" when configured on the 3750 platform running certain versions of software. The only other platform I have experience with AutoQos is on the 4500 and it enables priority queuing as expected. So what's up with autoqos on the 3750 on version 12.2(35)SE5? When it comes to configuring QoS on campus user/phone access ports there are some important settings that can and should be considered but one can argue that enabling ...

 

Espero sea util

saludos

Leonardo

[athan1234]

Muchas gracias .

Te comento algo más , donde no se ha implemnetado el auto qos trust y Auto qos voip es en el enlace troncal del port chanel contra los cores 6500

interface Port-channel1
 description Conexion contra core_central
 switchport trunk encapsulation dot1q
 switchport mode trunk
end

En el momento que se stablece en este enlace auto qos trust y Auto qos voip . Si pinchas un ordenador a algun puerto y haces pruebas de transferencia contra un servidor de ficheros las transferencias son casi el doble menor . Cuando  quitas del enlace troncal dichos comandos auto qos trust y Auto qos voip  las transferencias son el doble de rapidas .

Las qos en los switches de acceso las tenemos por defecto.

Te adjunto datos

C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE1, RELEASE SOFTWARE (fc2)

!
mls qos map cos-dscp 0 8 16 24 32 46 48 56
mls qos srr-queue input bandwidth 90 10
mls qos srr-queue input threshold 1 8 16
mls qos srr-queue input threshold 2 34 66
mls qos srr-queue input buffers 67 33
mls qos srr-queue input cos-map queue 1 threshold 2 1
mls qos srr-queue input cos-map queue 1 threshold 3 0
mls qos srr-queue input cos-map queue 2 threshold 1 2
mls qos srr-queue input cos-map queue 2 threshold 2 4 6 7
mls qos srr-queue input cos-map queue 2 threshold 3 3 5
mls qos srr-queue input dscp-map queue 1 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue input dscp-map queue 1 threshold 3 0 1 2 3 4 5 6 7
mls qos srr-queue input dscp-map queue 1 threshold 3 32
mls qos srr-queue input dscp-map queue 2 threshold 1 16 17 18 19 20 21 22 23
mls qos srr-queue input dscp-map queue 2 threshold 2 33 34 35 36 37 38 39 48
mls qos srr-queue input dscp-map queue 2 threshold 2 49 50 51 52 53 54 55 56
mls qos srr-queue input dscp-map queue 2 threshold 2 57 58 59 60 61 62 63
mls qos srr-queue input dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue input dscp-map queue 2 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 3 6 7
mls qos srr-queue output cos-map queue 3 threshold 3 2 4
mls qos srr-queue output cos-map queue 4 threshold 2 1
mls qos srr-queue output cos-map queue 4 threshold 3 0
mls qos srr-queue output dscp-map queue 1 threshold 3 40 41 42 43 44 45 46 47
mls qos srr-queue output dscp-map queue 2 threshold 3 24 25 26 27 28 29 30 31
mls qos srr-queue output dscp-map queue 2 threshold 3 48 49 50 51 52 53 54 55
mls qos srr-queue output dscp-map queue 2 threshold 3 56 57 58 59 60 61 62 63
mls qos srr-queue output dscp-map queue 3 threshold 3 16 17 18 19 20 21 22 23
mls qos srr-queue output dscp-map queue 3 threshold 3 32 33 34 35 36 37 38 39
mls qos srr-queue output dscp-map queue 4 threshold 1 8
mls qos srr-queue output dscp-map queue 4 threshold 2 9 10 11 12 13 14 15
mls qos srr-queue output dscp-map queue 4 threshold 3 0 1 2 3 4 5 6 7
mls qos queue-set output 1 threshold 1 138 138 92 138
mls qos queue-set output 1 threshold 2 138 138 92 400
mls qos queue-set output 1 threshold 3 36 77 100 318
mls qos queue-set output 1 threshold 4 20 50 67 400
mls qos queue-set output 2 threshold 1 149 149 100 149
mls qos queue-set output 2 threshold 2 118 118 100 235
mls qos queue-set output 2 threshold 3 41 68 100 272
mls qos queue-set output 2 threshold 4 42 72 100 242
mls qos queue-set output 1 buffers 10 10 26 54
mls qos queue-set output 2 buffers 16 6 17 61
mls qos

Te adjunto un puerto de acceso culaquiera donde convive telefono y pc

show mls qos interface Fa1/0/6 statistics
FastEthernet1/0/6 (All statistics are in packets)

  dscp: incoming  
-------------------------------

  0 -  4 :         420            0            0            0            0  
  5 -  9 :           0            0            0            0            0  
 10 - 14 :           0            0            0            0            0  
 15 - 19 :           0            0            0            0            0  
 20 - 24 :           0            0            0            0            0  
 25 - 29 :           0            0            0            0            0  
 30 - 34 :           0            0            0            0            0  
 35 - 39 :           0            0            0            0            0  
 40 - 44 :      363132            0            0            0            0  
 45 - 49 :           0       603844            0            1            0  
 50 - 54 :           0            0            0            0            4  
 55 - 59 :           0            0            0            0            0  
 60 - 64 :           0            0            0            0  
  dscp: outgoing
-------------------------------

  0 -  4 :    23486501            0            0            0            0  
  5 -  9 :           0            0            0       313079            0  
 10 - 14 :           0            0            0            0            0  
 15 - 19 :           0            0            0            0            0  
 20 - 24 :           0            0            0            0         8572  
 25 - 29 :           0            0            0            0            0  
 30 - 34 :           0            0            0            0            0  
 35 - 39 :           0            0            0            0            0  
 40 - 44 :           0            0            0            0            0  
 45 - 49 :           0      3656629            0            0            0  
 50 - 54 :           0            0            0            0            0  
 55 - 59 :           0            0            0            0            0  
 60 - 64 :           0            0            0            0  
  cos: incoming  
-------------------------------

  0 -  4 :      133432            0            0            0            0  
  5 -  7 :      966976            5            0  
  cos: outgoing
-------------------------------
interface FastEthernet1/0/6
 switchport access vlan x
 switchport mode access
 switchport nonegotiate
 switchport voice vlan x
 srr-queue bandwidth share 10 10 60 20
 srr-queue bandwidth shape 10 0 0 0
 priority-queue out
 mls qos trust cos
 auto qos voip trust
 spanning-tree portfast
end

  0 -  4 :    28257316       313079            0         8645            0  
  5 -  7 :     3656639      1317314            0  
  output queues enqueued:
queue: threshold1 threshold2 threshold3
-----------------------------------------
 queue 0:           2           0     3656781
 queue 1:      583712      285438    10718377
 queue 2:           0           0           0
 queue 3:           0      313079    33845324

  output queues dropped:
queue: threshold1 threshold2 threshold3
-----------------------------------------
 queue 0:            0            0           38
 queue 1:            0            0            0
 queue 2:            0            0            0
 queue 3:            0            4            0

Policer: Inprofile:            0 OutofProfile:            0

[Leonardo Pena Davila · Accepted solution]

Hola Athan, recomiendo que identifques si al momento de habilitar AutoQoS en tu enlace de uplink observas drops en la interfaz. Luego puedes aplicar estos mismos comandos a esta interfaz y tratar de identificar en cual cola del puerto existen estos drops. Tambien puede depender del tipo de aplicacion que estas utilizando en tu red.

Asegurate que todo este correcto con tu FTP de igual manera.

En la salida de los comandos que me enviastes hay pocos drops en la cola 0, no obstante, esto no me permitiria afirmar o recomendar algun tipo de modificacion de los buffers o thresholds.

Como te comente en el post anterior existen algunos Bugs que pudiesen estar afecatando el correcto funcionamiento de tu switch, otra prueba que puedes hacer si esta a tu alcance es actualizar el IOS de una de tus equipos y validar nuevamente.

te dejo un link donde hay informacion que puede ayudarte.

https://supportforums.cisco.com/t5/network-infrastructure-blogs/output-drops-due-to-qos-on-2960-3560-3750-switches/ba-p/3100658

Espero sea util

Saludos

Leonardo

[athan1234]

Refloto tema . @leonardo Pena Davila

Comentarte que el equipo es cisco WS-C2960S-48FPS-L 

C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE5, RELEASE SOFTWARE 

!
mls qos map dscp-cos 8 9 10 11 12 13 14 15 to 0
mls qos map dscp-cos 16 17 18 19 20 21 22 23 to 0
mls qos map dscp-cos 24 25 26 27 28 29 30 31 to 0
mls qos map dscp-cos 32 33 34 35 36 37 38 39 to 0
mls qos map dscp-cos 42 43 44 45 47 48 49 50 to 0
mls qos map dscp-cos 51 52 53 54 55 57 58 59 to 0
mls qos map dscp-cos 60 61 62 63 to 0
mls qos srr-queue output cos-map queue 1 threshold 3 5
mls qos srr-queue output cos-map queue 2 threshold 3 7
mls qos srr-queue output cos-map queue 3 threshold 3 0
mls qos srr-queue output cos-map queue 4 threshold 3 1 2 3 4 6
mls qos srr-queue output dscp-map queue 1 threshold 3 40 46
mls qos srr-queue output dscp-map queue 2 threshold 3 56
mls qos srr-queue output dscp-map queue 3 threshold 3 0
mls qos srr-queue output dscp-map queue 4 threshold 3 1 2 3 4 5 6 7 8
mls qos srr-queue output dscp-map queue 4 threshold 3 9 10 11 12 13 14 15 16
mls qos srr-queue output dscp-map queue 4 threshold 3 17 18 19 20 21 22 23 24
mls qos srr-queue output dscp-map queue 4 threshold 3 25 26 27 28 29 30 31 32
mls qos srr-queue output dscp-map queue 4 threshold 3 33 34 35 36 37 38 39 41
mls qos srr-queue output dscp-map queue 4 threshold 3 42 43 44 45 47 48 49 50
mls qos srr-queue output dscp-map queue 4 threshold 3 51 52 53 54 55 57 58 59
mls qos srr-queue output dscp-map queue 4 threshold 3 60 61 62 63
mls qos

Hline protocol is up (connected)
Hardware is Gigabit Ethernet, address is 10bd.18f9.f5a1 (bia 10bd.18f9.f5a1)
Description: Datos + ToIP^T
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX -- Es una interface giga , pero va conectado un telefono tambien por eso sincroniza a 100Mb.
input flow-control is off, output flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:42, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 35071206
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 4000 bits/sec, 4 packets/sec
242420620 packets input, 61849597790 bytes, 0 no buffer
Received 2469125 broadcasts (1841777 multicasts)
0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog, 1841777 multicast, 0 pause input
0 input packets with dribble condition detected
714190898 packets output, 226817943018 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
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

He realizado lo que me comentas 

He quitado en el puerto el el comando  mls qos trust cos . he realizado pruebas de transferencia de ficheros grandes 

Noto descartes  tanto activando las qos como quitando las qos

dscp: incoming
-------------------------------

0 - 4 : 975586 0 0 0 0
5 - 9 : 0 0 0 241 0
10 - 14 : 9 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 4
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 0 0
40 - 44 : 6065193 43 0 0 0
45 - 49 : 0 84787338 0 1617 3
50 - 54 : 0 0 1 0 10105
55 - 59 : 0 0 0 0 0
60 - 64 : 0 0 0 0
dscp: outgoing
-------------------------------

0 - 4 : 3759185 0 0 0 131367
5 - 9 : 0 0 0 127346989 6
10 - 14 : 41 0 0 0 0
15 - 19 : 0 0 0 0 0
20 - 24 : 0 0 0 0 422754
25 - 29 : 0 0 0 0 0
30 - 34 : 0 0 0 0 0
35 - 39 : 0 0 0 788 0
40 - 44 : 25468841 4134968 0 0 29
45 - 49 : 6584 58773137 0 50183 11
50 - 54 : 0 0 0 0 1802
55 - 59 : 0 1 1 0 0
60 - 64 : 0 0 0 0
cos: incoming
-------------------------------

0 - 4 : 151496985 246 0 4 0
5 - 7 : 90911612 11726 0
cos: outgoing
-------------------------------

0 - 4 : 292494638 127350237 192077 429129 38326
5 - 7 : 101210775 8027 178095915
output queues enqueued:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 111933565 40674189 179304393
queue 2: 0 0 0
queue 3: 0 0 423807106

output queues dropped:
queue: threshold1 threshold2 threshold3
-----------------------------------------------
queue 0: 0 0 0
queue 1: 33968260 1 18
queue 2: 0 0 0
queue 3: 0 0 1102927

Policer: Inprofile: 0 OutofProfile: 0

Interface Gi1/0/33 TxQueue Drop Statistics
Queue 0
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 1
Weight 0 Frames 33968260
Weight 1 Frames 1
Weight 2 Frames 18
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 1102927
Queue 4
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 5
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 6
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0
Queue 7
Weight 0 Frames 0
Weight 1 Frames 0
Weight 2 Frames 0