Maintenance architecture
Issue 3.4.1 June 2005
247
Figure 73: Avaya Communication Manager’s recovery levels
Restarts
These automatic recovery levels are listed from mildest to strongest, which is also from quickest
to slowest and more frequent to less frequent:
●
Single process restarts
●
System warm restarts
●
System cold restarts
●
Communication Manager reloads
●
Linux operating system reboots on S8300/S8700 Media Servers
Single process restarts
Process sanity audits are performed routinely (approximately every 10 seconds) on many
dozens of key software processes. In the event of a process hang, that single process will be
restarted, and no call outage will result. If three single process restarts are needed within a
60-second probationary period, the third single process restart is deemed ineffective, and will
instead escalate to a system warm restart.
System warm restarts
This mechanism preserves all stable and held calls, as well as feature activity data, throughout
the brief recovery period. Processes are essentially started with the same data and stacks that
they were using prior to the warm restart. If three warm restarts are needed within a 15-minute
probationary period, the system warm restart is deemed ineffective, and will instead escalate to
a system cold restart.
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 ...