Traffic engineering
162 Avaya Application Solutions IP Telephony Deployment Guide
A seven-site COI matrix analogous to the three-site matrix in
Table 21: 3-site standalone
community of interest (COI) matrix
on page 148 can be constructed for the network shown in
Figure 55: Network of Avaya systems and system sites
on page 161. A corresponding
seven-site, expanded COI matrix, similar to the one in
Table 25: Expanded COI matrix for a
three-site system
on page 156, can also be constructed. However, when multiple systems are
networked together, the additional step of engineering the tie trunk groups must be performed.
To do this, the COI matrices are used to determine the traffic flow between each pair of Avaya
systems.
In the network that is shown in
Figure 55: Network of Avaya systems and system sites
on
page 161, IP Trunk Group 1 carries calls between Sites 1 and 3, Sites 1 and 4, Sites 2 and 3,
and Sites 2 and 4, in addition to a presumably small amount of overflow traffic that involves
other sites. The traffic load that is associated with such calls is used to size that trunk group. Tie
trunk groups are typically sized at either P01 (1% blocking) or P03 (3% blocking). In a system
such as the one in
Figure 55: Network of Avaya systems and system sites
on page 161, the
traffic engineer must account for overflow traffic. The traditional Wilkinson model is an effective
tool for doing so. However, for systems that have larger numbers of systems in the network,
there can be many possible paths between a given pair of systems. In such cases, determining
the hierarchy of paths to consider for calls between two systems is not always straightforward.
The analysis involved in sizing the tie trunk groups in topologies such as those can be quite
complex.
Resource sizing
Overview
The primary Communication Manager resources that have the potential to be bottlenecks are
the TN799 C-LAN (Control LAN) circuit packs, the port network TDM bus pairs, the TN2302
Media Processing circuit packs, the TN2312 IPSI circuit packs, the server’s processing
capacity, and IP bandwidth. This section of the document provides a description of each of
these resources, and a discussion about how to engineer them. This is the final stage of the
design process.
Содержание Application Solutions
Страница 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Страница 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Страница 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 74: ...Avaya Application Solutions platforms 74 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Страница 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 214: ...Voice quality network requirements 214 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 239: ...Reliability Issue 3 4 1 June 2005 239 Figure 69 S8700 Media Server in a high reliability configuration ...
Страница 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Страница 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 350: ...Implementing Communication Manager on a data network 350 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Страница 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Страница 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...