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Webcast-Catalyst9k
New Member

"POLICY-MAP APPLICATION" IS IT OK? (BW RESERVATION FOR IP VOICE)

hello everybody,

I have applied some commmand lines in my remote router to reserve a dedicated bandwidth to my voice services:

This is the information.

<IP PHONE>--(CAMPUS_ROUTER)---(WAN)---(REMOTE_ROUTER)F0/0--<IP PHONE>

MAX. WAN BW=1MB (between CAMPUS_R and REMOTE_R)

the Main service is IP Telephony.

I want a dynamic behaviour of Voice Bandwidth:

-minimun voice BW = 256K

-Maximun voice BW = 512K (this should have a variable behaviour, if there is no calls, I dont need to reserve those 512K)

-DATA IP range: 172.30.48.0 255.255.248.0

-VOICE IP range: 172.17.216.0 255.255.248.0

THIS IS MY router configuration:

ip access-list extended VOICE

permit ip 172.17.216.0 0.0.7.255 any

class-map match-all VOICE

match access-group name VOICE

policy-map WAN

class VOICE

priority 256

class class-default

fair-queue

policy-map MAX512

class class-default

shape average 512000

service-policy WAN

interface FastEthernet0/0

description TO_WAN

ip address 10.8.86.90 255.255.255.248

service-policy output MAX512

load-interval 30

speed 10

full-duplex

interface FastEthernet0/1

description TO_LAN

no ip address

no ip redirects

no ip proxy-arp

load-interval 30

speed 100

full-duplex

no cdp enable

!

interface FastEthernet0/1.1

description VLAN DATOS

encapsulation dot1Q 1 native

ip address 172.30.16.1 255.255.248.0

no ip redirects

no ip proxy-arp

!

interface FastEthernet0/1.2

description VLAN VOICE

encapsulation dot1Q 2

ip address 172.17.216.1 255.255.248.0

no ip redirects

no ip proxy-arp

FRIENDS, IS MY CONFIGURATION RIGTH?

hoping recomendation?

WALTER MUNGUIA MARTINEZ

SAN MARCOS UNIVERSITY

LIMA-PERU

4 REPLIES
Purple

Re: "POLICY-MAP APPLICATION" IS IT OK? (BW RESERVATION FOR IP VO

Hi,

You indicated that you only wanted your voice traffic to be limited to a maximum of 512k, but that your WAN link was 1Mbps. With your current config, the maximum traffic you will get out of the WAN is 512k, inclusive of both voice and data.

You could do the following to get 1Mbps out of the WAN link while capping your voice traffic to 512k.

policy-map WAN

class VOICE

priority 256

police 512000 64000

class class-default

fair-queue

policy-map MAX1024

class class-default

shape average 1024000

service-policy WAN

interface FastEthernet0/0

description TO_WAN

ip address 10.8.86.90 255.255.255.248

service-policy output MAX1024

load-interval 30

speed 10

full-duplex

Hope that helps - pls rate the post if it does.

Paresh

New Member

Re: "POLICY-MAP APPLICATION" IS IT OK? (BW RESERVATION FOR IP VO

your policy map WAN is only prioritizing 256k for voice. If you change the priority to 512, then the map will prioritize voice traffic up to 512k. But I am not sure how the MAX512 map works with the WAN service policy added. It would appear that you are limiting all traffic to a shaped 512k. So if you policy map read

policy-map WAN

class VOICE

priority 512

class class-default

shape average 512000

fair-queue

And then apply the WAN as a service policy going out your wan interface. Be aware you are only controling traffic in one direction with this settup! You need to do the same at both ends to control traffic in both directions

GENE

New Member

Re: "POLICY-MAP APPLICATION" IS IT OK? (BW RESERVATION FOR IP VO

PARESH,

You indicated that the maximum traffic I will get out of the WAN is 512k (voice and data).

Does it mean that 1MB of BW is not real? I have to discuss this with my IP DATA Service Provider!

I am attaching a picture of the network and also the Main configuration of both Routers: CAMPUS_ROUTER and REMOTE_ROUTER.

could you tell me if I really have 1MB? I want to be sure about that.

Thanks.

****************************

GENE,

So changing the priority to 512 I will prioritize voice traffic up to 512k.

My IP DATA service provider told me that they made the BW upgrade sucefully in my link.

It is supposed that I have up to 1MB BW (voice and data)

and voice BW should have up to 512KB reserved. but at the same time it should have a dynamic bahaviour. (min voice BW = 256KB)

THANKS IN ADVANCE FRIENDS.

Purple

Re: "POLICY-MAP APPLICATION" IS IT OK? (BW RESERVATION FOR IP VO

Howdy,

That is not quite what I meant. I have no doubts that you have a full 1Mbps connection from your provider. I was just stating that your configuration of the remote router would limit the bandwidth.

Now, looking at your original requirments:

-minimun voice BW = 256K

-Maximum voice BW = 512K (this should have a variable behaviour, if there is no calls, I dont need to reserve those 512K)

I can see that the configuration you have got will not satisfy this.

Here is how I would do it:

CAMPUS ROUTER:

policy-map WAN-CID

class VOICE-CID

priority 256

police 512000 32000

class class-default

fair-queue

!

REMOTE ROUTER:

policy-map WAN

class VOICE

priority 256

police 512000 32000

class class-default

fair-queue

!

policy-map MAX1024

class class-default

shape average 1000000

service-policy WAN

!

interface FastEthernet0/0

description TO_WAN

ip address 10.8.86.90 255.255.255.248

service-policy output MAX1024

load-interval 30

speed 10

full-duplex

!

If you change the policies tothe above, you get the following:

- max throughput of 1 Mbps

- min voice bandwidth of 128k

- max voice bandwidth of 256k

Pls do try it out and let us know how you go.

Do remember to rate posts.

Paresh

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