100 TimeCreator 1000 User’s Guide 097-93100-01 Revision C – February, 2010
Chapter 5 Provisioning
Provisioning Root Server Recovery Mode
Requirements for Root Server Recovery
Root Server Requirements
The requirements to configure the root server for root server recovery are:
Configure Port 12 as a Client, but do NOT enable it
Connect Port 12 of root server to Port 1 of subtending server
Enable root server auto recovery feature
Subtending Server Requirements
The requirements to configure the subtending server for root server recovery are:
Connect Port 1 of subtending server to Port 12 of root server
Enable Port 1 of subtending server as DTI output
Duration of Root Server Recovery Process
If there is an outage of a TimeCreator root server, when it gets back on line, it will
slowly pull the phase of the subtending servers back into alignment in a manner
which minimizes cable modem re-ranging. The process of steering the subtending
servers time and phase can take as much as 32 hours depending on how long the
root server was off line, and on whether rapid recovery mode is selected. If
mis-alignment of the subtending server is large, it may take a long time for all the
DTI elements to be aligned.
When conditions warrant, the user can set another root-recovery per port control,
rapid recovery, to achieve a shorter re-alignment time. Note that this will cause
re-ranging of some DTI clients. The user can view the amount of time required for
recovery to determine whether they need to activate rapid recovery by displaying
status of the recovery process. See the sections Displaying Status of Root Server
Recovery, on page 101 and Enabling Rapid Recovery Mode, on page 102 for
details.
Warning: Using rapid recovery mode will cause network
interruption
.
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