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Reliability and Recovery
In this section, use the configuration recommended in Example 1 of
on the configuration data
estimated traffic load, the following configuration was recommended.
As shown in
Figure 75: Case Study I: Configuration of the Three Sites
IP-Connect System has a pair of S8700 media servers residing at the headquarters office in
Atlanta, one port network (two G650 media gateways) at headquarters, one port network (one
or two G650 media gateways) in the Boston branch office, and two G700 Media Gateways in
the Cleveland branch office. The link between servers and IPSIs residing on a port network
(PN) at the headquarters site traverses the LAN. The links between the media servers and the
two remote sites cross the WAN.
For the purpose of assessing full system availability, the percentage of traffic generated at each
site serves as the prorating factor for the downtime expected as a result of a failure at that site.
The percentage of traffic generated at each site is calculated from the Communities of Interest
(COI) Matrix presented in
Table 55: Percentage of Traffic Generated by Each Site is
Calculated Based on Traffic COI Matrices. Total Traffic Generated
by All Sites is 226 Erlangs.
Site Atlanta
Site Boston
Site
Cleveland
Case Study 1: The Standard reliability configuration:
The call processing link from the S8700 media servers to the G650 media gateways in the
headquarters is supported by a single LAN connection.
The call processing link from the servers to each of the branch offices is over a single
WAN link.
The quantity of C-LAN and Media Processor circuit packs or media modules follow the
recommendations in Section 2.1 for supporting the calculated traffic load, and have not
been engineered with N+1 reliability.
262 Avaya Application Solutions IP Telephony Deployment Guide
Table 19: Example 1 configuration data
Traffic
engineering.
Inbound &
Site
outbound
Atlanta
98E =>
32E =>
43.3%
14.2%
36E =>
12E =>
16%
5.2%
16E => 7%
6E => 2.7%
Traffic
engineering. Based
on page 145, and the
on page 263, this S8700
Site
Site
Boston
Clevelan
d
12E =>
5E =>
5.2%
2.2%
4E => 2%
2E=>
0.9%
2E =>
1E =>
0.9%
0.4%
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