PNC-DUP (PNC Duplication)
Issue 1 May 2002
8-1287555-233-143
Enabling and Removing PNC Duplication
NOTE:
PNC duplication requires IPSI duplication.
To Enable PNC Duplication
To enable PNC duplication perform the following sequence of steps:
1. Enable PNC-DUP on the change system-parameters customer-options
form.
2. Fully administer duplicate fiber link connectivity. Verify by list fibers. For
IP Duplication go to step three.
3. Fully administer IPSI duplication (ipserver-interface duplication). Verify
by using list ipserver-interface.
4. Turn on PNC-DUP via the change system-parameters duplication form.
This is note allowed if any component of either PNC (A or B) is busied out.
5. The system must insert all connectivity-related components for both
standby and active PNC. For CSS configurations this takes up to 5
minutes depending upon CSS circuit pack insertion. For Direct Connect
configurations this is declared complete at 5 minutes after the first
appearance of the terminal login prompt.
6. The PNC-DUP initialization anti-thrashing timer must expire (this occurs 5
minutes after completion of board insertion, PNC interchange, or system
reset of level 2 or higher).
To Disable PNC Duplication
To disable PNC duplication perform the following sequence of steps:
1. Verify that the A-PNC is active. A forced interchange may be required.
See reset pnc in Chapter 8.
2. Busyout the standby PNC (B-PNC).
3. Turn off the system parameter for PNC-DUP via change
system-parameters duplication.
After PNC duplication has been removed, configuration audits will generate
the alarm shown below and possibly others. To clear this alarm, the
B-PNC fibers, circuit packs in switch node carriers (EIs, SNIs, SNCs, and
DS1Cs), and switch node carriers must be removed as outlined in the
following steps.
01D SN_CONF 5000 255
In this case, 01D is the B-PNC switch node from which duplication was
removed.
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