Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
New Member

Implementing QOS

I want to implement QOS for VOIP traffic between Branch Office IP phones and Headoffice PABX.

Basic network diagram is as follows

Nortel IP PHONES (Branch Office)

|

L2 ordinary Switch

|

Cisco 1841

|

|

-----MPLS WAN-----

|

|

Cisco 1841

|

Cisco ASA

|

Cisco 3560 (with multiple VLANs)

|

NORTEL PABX (Headoffice)

Regards,

Muhammad

1 REPLY

Re: Implementing QOS

hello muhammad,

you will need to configure a low-latency queueing strategy giving priority & bandwidth allocation to voice traffic. you can use this sample config and build upon this:

router(config)# class-map voice

router(config-cmap)# match access-group 102

router(config)# policy-map policy1

router(config-pmap)# class voice

router(config-pmap-c)# priority 50

router(config-pmap)# class bar

router(config-pmap-c)# bandwidth 20

router(config-pmap)# class class-default

router(config-pmap-c)# fair-queue

router(config)# access-list 102 permit udp host 10.10.10.10 host 10.10.10.20 range

16384 20000

router(config)# access-list 102 permit udp host 10.10.10.10 host 10.10.10.20 range

53000 56000

interface serial0/1

service-policy output policy1

if you have other traffics, u can configure the classmaps accordingly... you can read about LLQ for more info:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/122t/122t2/ftllqpct.htm

hope this helps..all the best.. rate replies if found useful..

Raj

268
Views
0
Helpful
1
Replies
CreatePlease to create content