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Problems with Precedence

We configured a input QoS policy on particular interface, where we are

forcing precendence, however noticed that the same is not being made​​.

In summary we have the following configuration:

RP/0/RP0/CPU0:CRS# sh run int hundredGigE 0/3/0/0         

Mon May 14 16:19:54.009 DST

interface HundredGigE0/3/0/0

service-policy input XPTO

ipv4 bgp policy propagation input qos-group source

ipv4 address 10.10.10.1 255.255.255.252

ipv6 nd suppress-ra

carrier-delay up 5000 down 0

load-interval 30

!

RP/0/RP0/CPU0:CRS#sh run policy-map XPTO

Mon May 14 16:20:16.558 DST

policy-map XPTO

class class-qos10

  set precedence 1

!

class class-qos20

  set precedence 0

!

class class-default

!

end-policy-map

!

RP/0/RP0/CPU0:CRS#sh run class-map class-qos10

Mon May 14 16:20:23.409 DST

class-map match-any class-qos10

match qos-group 10

end-class-map

!

RP/0/RP0/CPU0:CRS#sh run class-map class-qos20

Mon May 14 16:20:26.210 DST

class-map match-any class-qos20

match qos-group 20

end-class-map

!

RP/0/RP0/CPU0:CRS#sh policy-map interface HundredGigE0/3/0/0

Mon May 14 16:20:05.718 DST

HundredGigE0/3/0/0 input: XPTO

Class class-qos10

  Classification statistics          (packets/bytes)     (rate - kbps)

    Matched             :       6793713014812/5788911678523417     13070576

    Transmitted         :       6793713014812/5788911678523417     13070576

    Total Dropped       :                   0/0                    0

  Queueing statistics

    Queue ID                             : 49120

    Taildropped(packets/bytes)           : 0/0

Class class-qos20

  Classification statistics          (packets/bytes)     (rate - kbps)

    Matched             :         59306695626/56107446620469       32982

    Transmitted         :         59306695626/56107446620469       32982

    Total Dropped       :                   0/0                    0

  Queueing statistics

    Queue ID                             : 49120

    Taildropped(packets/bytes)           : 0/0

Class class-default

  Classification statistics          (packets/bytes)     (rate - kbps)

    Matched             :            54537026/4385234548           7

    Transmitted         :            54537026/4385234548           7

    Total Dropped       :                   0/0                    0

  Queueing statistics

    Queue ID                             : 49120

    High watermark  (bytes)/(ms)         : 6552/0

    Inst-queue-len  (bytes)/(ms)         : 0/0

    Avg-queue-len   (bytes)/(ms)         : 2/0

    Taildropped(packets/bytes)           : 0/0

HundredGigE0/3/0/0 direction output: Service Policy not installed

RP/0/RP0/CPU0:CRS#sh cef 8.8.8.8

Mon May 14 16:20:33.329 DST

8.8.8.0/24, version 22, internal 0x4000001 (ptr 0x9e453b00) [1], 0x0 (0x0), 0x0 (0x0)

Updated May  8 08:20:04.329

Prefix Len 24, traffic index 0, precedence routine (0)

QoS Group: 10

   via 10.10.10.2, 3 dependencies, recursive, bgp-ext [flags 0x20]

    path-idx 0

    next hop 10.10.10.2 via 10.10.10.0/30

As you can see here this prefix makes match on qos-group 10, so should be marked with a

precedence 1, but is marked with 0.

can help?

Everyone's tags (2)
1 REPLY
Cisco Employee

Problems with Precedence

hi Luis,

Can you also supply the CEF hardware output, so we can check the precedence their as well. Use the CLI

"show cef 8.8.8.8 hardware ingress location 0/3/cpu0" and we'll look at the qos_precedence: value to see if it is also set to 0.

thx,

David

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