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PNC-DUP (PNC Duplication)
Issue 1 June 2005 1855
Enabling and Removing PNC Duplication
Note:
Note: PNC duplication requires IPSI duplication.
To Enable PNC Duplication
To enable PNC duplication:
1. Enable PNC-DUP on the change system-parameters customer-options screen.
2. Fully administer duplicate fiber link connectivity. Verify by issuing list fiber-link. For
IP Duplication go to Step 3
.
3. Fully administer IPSI duplication (ipserver-interface duplication). Verify by using
list ipserver-interface.
4. Turn on PNC-DUP using the change system-parameters duplication screen. This
is not 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 using change system-parameters
duplication.
After PNC duplication has been removed, configuration audits 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.