Bandwidth allocation for specific subnet

[ittechk4u1]

Hello all,

Could anyone help me to configure Bandwidth allocation!

Here is my design:

I have a ISP with 30Mb line on Remote location and 100Mb line on HQ.

Now I want to allocate 20Mb for specific subnet (10.75.21.0./24 <-->10.18.14.0/24). For all other subnet router must use the rest Bandwidth.

How can can i do it ?

Regards

ITTech

[Sunil Bhadauria · Accepted solution]

Hello ,

I will try to help ,

if i understood right, you could achieve it by using MQC at either end ( remote / HQ) 

at remote end you might want to do :

- create a ACL to match concerned other side subnet (10.18.14.0/24)

- create a class-map and match with above ACL to classify outgoing traffic on Remote router towards HQ subnet

- Create a policy-map , call above class-map in it :

eg,

policy-map test

class-map xyz  >>>>>>>>>>> class-map name created in above step

priority 20000  >>>>>>>>>>> define bandwidth in KB 

class-map default 

- finally you could apply in policy-map on wan interface.

similarly you could do vice versa on HQ for outgoing subnet towards remote router.

let me know for any further queries or correction.

Regards

Sunil Bhadauria

[ittechk4u1]

Hi Sunil,

Thanks for support.

Here is my configuration....

======================================================
Remote:

Acces-list 100 permit ip 10.18.14.0 0.0.0.255 any
!
class-map match-any CAD
match access-group 100
!
policy-map CITRIX-20MB
class CAD
bandwidth 20000
!
!
interface gig0/0
Service-policy output CITRIX-20MB


=======================================================
HQ:

Acces-list 100 permit ip 10.75.21.0 0.0.0.255 any
!
class-map match-any CAD
match access-group 100
!
policy-map CITRIX-20MB
class CAD
bandwidth 20000
!
!
interface gig0/0
Service-policy output CITRIX-20MB

=======================================================

Is it ok!!!!

Regards

ITTech

[Sunil Bhadauria]

Yes , that should work .

However you may want to recheck on whether you want to use "bandwidth" or "priority" keyword under policy-map . that depends on what you need .

if you want this traffic to use specifically only 20MB and not more than that , you may want to use "priority" . Which will only provide maximum of specified BW to particular class ( as it has a built-in policer) .

But with "bandwidth" there is no maximum limit and this class can use upto any available * bandwidth ( which maybe good one way and yet again depends on what you need). However if you still want this class to be limited to 20MB whether rest of the BW is available or not , than you could also consider using policer along with "bandwidth" keyword .

for detailed deference between both of these options kindly follow : 

http://www.cisco.com/c/en/us/support/docs/quality-of-service-qos/qos-packet-marking/10100-priorityvsbw.html  

HTH 

Sunil 

To acknowledge , kindly rate all valuable posts ! 

[ittechk4u1]

Thanks you Sunil for quick Help.

Regards