11-12-2008 11:31 PM - edited 03-04-2019 12:18 AM
Hi
I have 4 nos 2Mbps aggreagated link on two 2811 router.I have configured a multilink ppp for aggregation.How can i setup QOS for voice calls on the link.
The protocol used is H.323 .How to identify the voice traffic on router.Can NBAR be used to identify the traffic ?
11-13-2008 12:12 AM
You can either do this on the basis of network and ports and assign the voice traffic to a srtict priority queue. OR
If the device is capable of marking DSCP, you can trust DSCP on the access switches and assign bandidth to EF
-Sai.
11-13-2008 05:39 AM
One way to prioritize voice would be usage of a CBWFQ service policy, outbound, on your multilink interface. Place the voice into a LLQ class.
For identification, as Sai notes, the voice might (or can) tag their packets and you could match against their ToS. And/or identification via an ACL and/or NBAR. (The later NBARs do support matching against many kinds of voice traffic.)
PS:
Don't neglect special treatment of voice signally traffic.
11-13-2008 05:53 AM
Hi,
NBAR is used for traffic classification, you can use NBAR to classify voice traffic or an access-list , bellow an example for both:
class-map match-any (name)
match protocol rtp audio
or
class-map match-any (name)
match access-group 100
access-list 100 permit udp range 16348 32767
you then add the Class to a defined policy and apply it to the interface.
HTH
Mohamed
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