16 Second-Generation Channel Interface Processor (CIP2) Installation and Configuration
Installation Prerequisites
•
Handle processor modules by the carrier handles and carrier edges only; never touch the board
or any connector pins.
•
When you remove a processor module, place it card side up on an antistatic surface or in a static
shielding bag. Immediately place the module in a static shielding bag if you need to return it to
the factory.
•
Avoid contact between electronic equipment and clothing. Antistatic straps only protect the
equipment from ESD voltages on the body; ESD voltages on clothing can still cause damage.
Caution
For safety, periodically check the resistance value of the antistatic strap. The
measurement should be between 1 and 10 megohms.
Online Insertion and Removal—An Overview
The OIR feature allows you to remove and replace interface processors while the system is
operating; you do not need to notify the software or shut down the system power.
Note
This section describes the mechanical functions of the system components and emphasizes
the importance of following the correct procedures to avoid unnecessary board failures. This section
is for background information only; specific procedures for the CIP2 are contained in the following
sections.
Each interface processor contains a male connector with which it connects to the system backplane.
Each card (male) connector comprises a set of tiered pins, in three lengths. The pins send specific
signals to the system as they make contact with the backplane. The system assesses the signals it
receives and the order in which it receives them to determine what event is occurring and what task
it needs to perform, such as reinitializing new interfaces or shutting down removed ones.
For example, when inserting an interface processor, the longest pins make contact with the
backplane first, and the shortest pins make contact last. The system recognizes the signals and the
sequence in which it receives them. The system expects to receive signals from the individual pins
in this logical sequence, and the ejector levers help to ensure that the pins mate in this sequence.
When you remove or insert an interface processor, the backplane pins send signals to notify the
system, which then performs as follows:
1
Rapidly scans the backplane for configuration changes.
2
Initializes all newly inserted interface processors, noting any removed interfaces and placing
them in the administratively shut down state.
3
Brings all previously configured interfaces on the interface processor back to the state they were
in when they were removed. Any newly inserted interfaces are put in the administratively shut
down state, as if they were present (but unconfigured) at boot time. If a similar interface
processor type has been reinserted into a slot, its ports are configured and brought on line up to
the port count of the original interface processor.
The system brings on line only interfaces that match the current configuration and were previously
configured as up; all others require that you configure them with the configure command.
OIR functionality enables you to add, remove, or replace interface processors with the system on
line, which provides a method that is seamless to end users on the network, maintains all routing
information, and ensures session preservation.
