Ioc Card Placements In Tp5000 Chassis; Overview - Symmetricom TimeProvider 5000 User Manual

Appendix D Redundant IOC Cards

Overview

Overview
The TimeProvider 5000 chassis has two IOC card slots, IOC1 and IOC2, as shown
in Figure D-1. In v1.0, the TP5000 could only support a single IOC card, which had
to be installed in the IOC1 position. In v1.1, the Redundant IOC Cards feature was
introduced to the TP5000.
Figure D-1.

IOC Card Placements in TP5000 Chassis

If the TP5000 v1.1 is configured with two IOC cards, the IOC cards will
automatically operate redundantly. (There is no capability for the user to disable
redundancy.) With redundancy, one card is Active and drives outputs, while the
other is in Standby mode. Both cards share the same configuration, IOC1, so both
IOC cards will have the same IP addresses and Clock IDs for the Ethernet ports on
either card, but with different MAC addresses for each IOC card. Neither card is
primary and redundancy is not revertive. However, IOC1 will be the active IOC if
the entire system is rebooted or powered-up, and preference is given to a Rb IOC
on initial warmup.
If the TP5000 v1.1 is configured with one IOC card, the card can be located in either
the IOC1 or IOC2 position.
On system power-up, IOC1 will be active. After initial warm-up of both cards is
complete, the IOC with the Rb oscillator will be active, even if it is IOC2. If the active
IOC card fails, exhibits certain diminished health conditions, or loses its Ethernet
connection, the TP5000 will switch over to the standby card within 10 seconds. The
configuration and state is synchronized between cards automatically. The user can
also use a CLI command or SNMP (if SNMP option is purchased) to initiate a
manual switchover.
Note:
IOC after power-up of the system, regardless of its position as IOC1 or
IOC2.
482 TimeProvider 5000 User's Guide
The IOC with the Rb oscillator is initially selected as the Active
098-00028-000 Revision F – May, 2012