Design for High Availability
Issue 3.4.1 June 2005
267
As reflected in
Table 60: Weighted System Availability with LSP and N+1 IP resources.
on
page 267, the highest downtime is contributed by the WAN link between the headquarters in
Atlanta and the two branch offices.
Table 59: Case Study II: Cleveland and Boston Local Availability values are
improved by LSP. Atlanta’s Availability value is improved by N+1 IP resources.
Avaya Product
Complete Solution including
data network Availability
Site
Availability
Annual
Downtime
Minutes
Availability
Per Site Annual
Downtime
Minutes
Atlanta
99.99%
53
99.99%
53 (4.3 hrs)
Boston
99.95%
263
99%
5260 (88 hrs)
Cleveland
99.99%
53
99.99%
53
Table 60: Weighted System Availability with LSP and N+1 IP resources.
Full Solution Availability Projected
Weighted Downtime
minutes.
% of traffic generated in Atlanta
×
Annual
downtime minutes in Atlanta
(43.3% + 14.2%)
×
53 = 30.5
% of traffic generated in Boston
×
Annual
downtime minutes in Boston
(16% + 2%)
×
5260 = 940
% of traffic between Atlanta and Boston
×
Annual
downtime minutes due to failure in Atlanta, WAN,
and in Boston
(5.2% + 5.2%)
×
5260 = 547
% of traffic generated in Cleveland
×
Annual
downtime minutes in Cleveland
(7% + 0.4%)
×
53 = 4
% of traffic between Atlanta and Cleveland
×
Annual downtime minutes due to failure in Atlanta,
WAN, and in Cleveland
(2.7% + 2.2%)
×
5260 = 258
% of traffic between Boston and Cleveland
×
Annual downtime minutes due to failure in Boston,
WAN, and in Cleveland
(0.9% + 0.9%)
×
5260 = 95
Aggregated Downtime
1874.5 minutes
(30.5 + 940 + 547 + 4 + 258 +
95)
System Availability = 99.6%
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 ...