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Change control
Test evaluation of change
Testing and verification can be critical to a successful change. You should identify testing steps
after defined change checkpoints and final change completion. In addition, allocate sufficient
time for testing, both during and following the implementation and backout, if necessary. In
some cases, you can do testing prior to the change when new service is involved, such as new
circuits or links that are not currently in production. The following additional testing and
verification procedures may be pertinent to a network change:
Extended pings for connectivity and performance (may require many to many)
Traceroutes
End-user station network and application testing
Test calls or traffic generation for performance-related changes
Bit error rate tester (BERT) for new circuits
Display errors
Log file verification
List trace verification
Display or status command verification
Network management station availability and verification
After achieving some level of comfort with the change, evaluate what was accomplished:
Does the change make sense?
Did the change address the network problem?
What should be done differently the next time that a change is warranted?
Network management update
Operational readiness requires that you update all network management tools, device
configuration, and DNS to reflect the change. Your organization might also have tools for fault
management, configuration management, availability measurement, inventory management,
billing, and security that require updates. The following are some typical network management
update requirements following change:
Removal of DNS entries and network management system (NMS) management for
devices that were removed from the network.
Standard SNMP configuration entered on devices, including community string, location,
support contact, syslog server, trap server, and SNMP server host.
Trap source, syslog source, and SNMP source configured for loopback.
380 Avaya Application Solutions IP Telephony Deployment Guide
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