Solved: Problem in applying QOS on PRI channel Group

mohindersingh · ‎09-06-2007

HI,

I am having a WAN connection between 2 sites A&B. ON A side we are using a private/leased line of 768k and on B side we are using 12 channels of a PRI line.

When I am applying QOS on the A side eveything is fine and in the the output of command "sh int s0/0" it is showing available bandwidth is equal to 75% of 768K.

But on B side when i have applied Qos it is showing me the available bandwidth is 3kb.

After removing QOS on the channel-group int it is showing me 768k of avaible bandwidth in "sh int s1/0:1".

I have attached all the outputs in the attachment.

Waiting for the replies.

Regards

Mahi

mheusing · ‎09-06-2007

Hi Mahi,

The attached policy is

policy-map mahi

class QPM_Q6

bandwidth percent 4

random-detect

class QPM_Q5_1

priority 230

class QPM_Q3

bandwidth percent 35

random-detect

class QPM_Q1

bandwidth percent 1

random-detect

class class-default

bandwidth percent 30

random-detect

The formula to consider is:

Available Bandwidth = max-reserv x interface bandwidth - allocated bandwidth

In your case:

interface bandwidth = 768 kb

max-reserv = 100%

allocated bandwidth = 230 kbps + 30 kbps (4%) + 268 kbps (35%) + 7 kb (1%) + 230 kbps (30%) = 765 kbps

Thus remaining bandwidth is 3 kbps. Nothing wrong with it. Router can do the math.

Regards, Martin

View solution in original post

mheusing · ‎09-06-2007

Hi Mahi,

The attached policy is

policy-map mahi

class QPM_Q6

bandwidth percent 4

random-detect

class QPM_Q5_1

priority 230

class QPM_Q3

bandwidth percent 35

random-detect

class QPM_Q1

bandwidth percent 1

random-detect

class class-default

bandwidth percent 30

random-detect

The formula to consider is:

Available Bandwidth = max-reserv x interface bandwidth - allocated bandwidth

In your case:

interface bandwidth = 768 kb

max-reserv = 100%

allocated bandwidth = 230 kbps + 30 kbps (4%) + 268 kbps (35%) + 7 kb (1%) + 230 kbps (30%) = 765 kbps

Thus remaining bandwidth is 3 kbps. Nothing wrong with it. Router can do the math.

Regards, Martin

mohindersingh · ‎09-06-2007

Hi Martin,

We are using same kind of QOS policy on other channel group interfcae also. ALL interfaces are configured with "max-reserved bandwidth command" as well as 100% distribution of bandwidth in QOS classes but they are showing half of the bandwidth as avaible bandwidth.

Can you clarify my doubt.

Thanks for ur reply.

Regards

Mahi

mheusing · ‎09-06-2007

Hi Mahi,

Can you provide the configs and respective show command output? Without this it is hard to state anything.

Regards, Martin