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QoS Doesn't Work in the 3750.

                   I created the configuration below to limit the bandwidth, but doesn't work, Could anyone help me ?

Qos - 3750

!

mls qos
mls qos map policed-dscp  10 to 8
!
class-map match-all Test
match access-group name ACL
!
policy-map QOS
description Limit 10M
  set ip dscp af11
  police 10000000 8192 exceed-action drop
!
ip access-list extended ACL

permit ip 10.112.11.0 0.0.0.127 host 10.112.0.55
permit ip 10.112.11.0 0.0.0.127 host 10.112.0.5
remark All traffic to SMS QoS Policy
remark -----------------------------------
!
interface GigabitEthernet1/0/48
mls qos trust dscp
service-policy input QOS

6 Replies 6

mahmoodmkl
Level 7
Level 7

Hi,

It should be like this.

policy-map QOS

description Limit 10M

class TEST

  set ip dscp af11

  police 10000000 8192 exceed-action drop

Sorry, It was a fail in the my Copy/Paste. It has already in the configuration.

Correcting:

mls qos
mls qos map policed-dscp 10 to 8
!
class-map match-all Test
match access-group name ACL
!
policy-map QOS
description Limit 10M
class Test

set ip dscp af11
police 10000000 8192 exceed-action drop
!
ip access-list extended ACL

permit ip 10.112.11.0 0.0.0.127 host 10.112.0.55
permit ip 10.112.11.0 0.0.0.127 host 10.112.0.5
remark All traffic to SMS QoS Policy
remark -----------------------------------
!
interface GigabitEthernet1/0/48
mls qos trust dscp
service-policy input QOS

Hi,

remove the set ip dscp af11 and try.

Can you post the output of show policy-map interface gig1/0/48

GigabitEthernet1/0/48 (All statistics are in packets)

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

  0 -  4 :  2139799416         6760      3821267          597     23962222
  5 -  9 :           0            1            0            0            0
10 - 14 :      389453            0            0            0            0
15 - 19 :           0            0            0    298277503            0
20 - 24 :        1082            0            0            0     53504963
25 - 29 :           0       791701            0            0            0
30 - 34 :           0            0            0            0          256
35 - 39 :           0            0            0            0            0
40 - 44 :           0            0            0            0            0
45 - 49 :           0    280919783            0     16939789            0
50 - 54 :           0            0            0            0            3
55 - 59 :           0        53030            0            0            0
60 - 64 :           0            0            0            0
  dscp: outgoing
-------------------------------

  0 -  4 :  2527356267          437            0           97            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     87594795
25 - 29 :           0        41434            0            0            0
30 - 34 :           0            0     18365688            0            0
35 - 39 :           0            0            0            0            0
40 - 44 :    13456011            0            0            0            0
45 - 49 :           0    307564669            0     17077336            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 :  2820303428            0            0            0            0
  5 -  7 :           0            0            0
  cos: outgoing
-------------------------------

  0 -  4 :  2605164848            0            0     85068985            0
  5 -  7 :   264277252     16952450            3
  output queues enqueued:
queue:    threshold1   threshold2   threshold3
-----------------------------------------------
queue 0:      140557           0           0
queue 1:   321476578    47423233    60760425
queue 2:           0           0           0
queue 3:      278235           0  2606776078

  output queues dropped:
queue:    threshold1   threshold2   threshold3
-----------------------------------------------
queue 0:           0           0           0
queue 1:      134617         210           0
queue 2:           0           0           0
queue 3:           0           0       17838

Policer: Inprofile:            0 OutofProfile:            0

Apparently show policy-map interface on a 3750 switch is not the same output as on a router. The reason for this is the packets are hardware switched.

Regarding your statistics I guess that maybe your acl is not correct.

If possible can you change

class-map match-all Test

match any

or at least verify the acl?

How are you testing btw? from? to?

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