Qos Configuration for prioritization to H.323

Nitesh Prabhakar · ‎07-15-2014

Hi Experts, I have 2Mbps line in which i want to give priority to video calls i.e H.323 and for voice calls and data (email , ftp ) lesser priority. For example if i 2 video calls are on and rest is occupied by voice calls or data and the number of video call increases to 2 Mbps the voice cal should be dropped and data transfer (emails, ftp etc) should also dropped. Plz share the document of CLI for the configuration. Is this configuration to be done in all the traversing devices in which the packet is travelling from source to destination. Plz help out with commands

Nitesh Prabhakar · ‎07-15-2014

Router(config)# priority-list list-number protocol
protocol-name {high | medium | normal | low}
queue-keyword keyword-value

when im doing this .... in config mode no priority-list command is taking ......

Joseph W. Doherty · ‎07-15-2014

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Posting

QoS commands are dependent on platform, and especially for routers, IOS version. I.e. without that information, cannot provide commands.

Also, generally device QoS doesn't so drop existing flows as more important comes through, although more important traffic can take most of the bandwidth being used by less important traffic (which often results in frame/packet drops).

Nitesh Prabhakar · ‎07-15-2014

Sir its 15.0 (1)T ....... dropping case was juz a example...i checked 15.0 is not supported with the priority-list command ...... so sir what should i do now....should i downgrade my ios ....if yes then to which version

Joseph W. Doherty · ‎07-15-2014

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Posting

See if CBWFQ meets your needs.

Nitesh Prabhakar · ‎07-16-2014

hiiii...Sir

basically i tired this and was successful upto some extent .... actually my basic need is that i want to prioritize my one ip (video conference camera) ...so that even i congestion it works fine i.e no freezing ...and when conferencing is not going on full bandwidth is available for other services. Plz help out

1> i tried CBWFQ by matching protocol but i found the video call was through h.264 and not h.323 as in router no option for h.264 ...only h.323 is there

2> if i get success...one which all devices i have to put the class map and service policy...whether on all traversing network device/interfaces

Joseph W. Doherty · ‎07-16-2014

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Posting

#1 If a suitable NBAR protocol match isn't useful, then you match using an ACL.

# Policy placement depends where your bottlenecks are.

A policy to give bandwidth to something like your video, but allow unused bandwidth to other classes is done by just setting your bandwidth statement, for video, to what's needed by your video. The policy will insure that video obtains that much bandwidth, if needed, but will allow other classes to use unused video bandwidth.