Quality of Service guidelines
328 Avaya Application Solutions IP Telephony Deployment Guide
2. The command to turn on compression is
ip rtp header-compression
in interface
configuration mode. It must be implemented at both ends of the WAN link. When the
command was entered into the router, ip tcp header-compression was also installed
automatically. When either command was removed, the other was automatically removed.
See the Cisco documentation for more specific configurations on other types of WAN links (that
is, Frame Relay and ATM). Configuration for the X330WAN router is very similar to Cisco, and is
well documented in the X330WAN User Guides. For this documentation, see the P330 section
at:
http://www.avaya.com/support
Examples of QoS implementation
This section contains sample commands for QoS implementation on Avaya products and Cisco
products.
Examples given include:
●
Example 1: Cisco router configuration for point-to-point WAN links
●
Example 2: C-LANS cannot tag their traffic
●
Example 3: More restrictions on the traffic
●
Converged infrastructure LAN switches
Example 1: Cisco router configuration for point-to-point WAN
links
There is a three-step process to turn on QoS on a Cisco router:
1. Set up a class map that defines “interesting traffic” to be prioritized.
2. Select a queuing strategy. In this case, use a policy map to set priority. Set up a route map
that sets the priority level (critical).
3. Apply the policy map to an interface.
In
Figure 85: High-quality service across a congested WAN link
on page 329, set priority-aware
Class-Based Weighted Fair Queuing (CB-WFQ) with Low Latency Queuing (LLQ). Although
there are more aggressive QoS strategies, they can have a severe impact on data performance.
Those other strategies, including Priority Queuing, Custom Queuing, and RSVP, can be
implemented at a later date, if conditions warrant. This is a good starting point.
Figure 85: High-quality service across a congested WAN link
on page 329 is used as a
reference point. The objective is to assure high quality of service to IP Telephony applications
across the congested WAN link.
Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...