Best practices
Issue 3.4.1 June 2005
281
Best practices
To consistently ensure the highest quality voice, Avaya highly recommends consideration of the
following industry best practices when implementing IP Telephony. Note that these suggestions
are options, and might not fit individual business needs in all cases.
●
QoS/CoS. QoS for voice packets is obtained only after a Class of Service (CoS)
mechanism tags voice packets as having priority over data packets. Networks with periods
of congestion can still provide excellent voice quality when using a QoS/CoS policy. The
recommendation for switched networks is to use IEEE 802.1p/Q. The recommendation for
routed networks is to use DiffServ Code Points (DSCP). The recommendation for mixed
networks is to use both. Port priority can also be used to enhance DiffServ and IEEE
802.1p/Q. Even networks with plentiful bandwidth should implement CoS/QoS to protect
voice communications from periods of unusual congestion, such as a computer virus might
cause. See
Implementing Communication Manager on a data network
for more
information.
●
Switched network. A fully switched LAN network is a network that allows full duplex and
full endpoint bandwidth for every endpoint that exists on that LAN. Although IP Telephony
systems can work in a shared or hub-based LAN, Avaya recommends the consistently
high results that a switched network lends to IP Telephony.
●
Network assessment. A Basic Network Readiness Assessment Offer from Avaya is vital
to a successful implementation of IP Telephony products and solutions. Contact an Avaya
representative or authorized dealer to review or certify your network.
Network assessment
offer
explains the options that are available with this offer.
●
VLANs. Placing voice packets on a separate VLAN or subnetwork from data packets is a
generally accepted practice to reduce broadcast traffic. When data is on a shared LAN,
this practice also reduces contention for the same bandwidth as voice. Note that Avaya IP
Telephones provide excellent broadcast storm protection. Other benefits become available
when using VLANs, but there can be a substantial cost with initial administration and
maintenance. Section 3.2.1.2 Using VLANs explains this concept further.
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 ...