Problem with a child policy-map on cisco 7301

Unanswered Question
Oct 18th, 2007

Hi, everybody!

I faced a problem of abnormal behavior of 7301 with the following configuration of QOS:

policy-map PARENT

class class-default

shape average 512000

service-policy CHILD

policy-map CHILD

class REALTIME_N

priority percent 50

class REALTIME_OV_N

priority percent 2

class PREMIUM_N

bandwidth percent 20

random-detect

class STANDART_N

bandwidth percent 2

random-detect

class MANAGEMENT_N

bandwidth percent 3

class class-default

bandwidth percent 5

random-detect

Experiment is the following:

I attach this policy as OUTPUT on Gig interface and send 3 flows (prec 5,3,1) 512 kbps each (1536 kbps total!).

I know, that the configuration is stupid, but i couldn't understand - why priority class REALTIME_N doesn't get the configured line rate (50%)! Moreover, less prioritized class PREMIUM_N get more then REALTIME_N!!!!

If I remove the unnecessary classes from CHILD policy map:

policy-map ENTERPRISE_OUT_NEW

class REALTIME_N

priority percent 50

class PREMIUM_N

bandwidth percent 20

random-detect

class class-default

bandwidth percent 5

random-detect

Everything is ok! and work properly!

If this situation is interesting for somebody - i could attach screenshot of Chariot program!

I have this problem too.
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owillins Wed, 10/24/2007 - 05:39

What IOS is running on the 7301's choices: 1) split your application traffic on multiple tunnels & rely on the provider to provide layer 2 qos or 2) Ensure that there is no congestion in the tunnel path and provide layer 3 qos at the edges

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