Removing and Installing Port Adapters
This chapter describes how to remove the PA-A3 OC-12 from supported platforms and also how to install a new or replacement port adapter. This chapter contains the following sections:
•Each port adapter circuit board is mounted to a metal carrier and is sensitive to electrostatic discharge (ESD) damage.
•Handling Port Adapters
•Online Insertion and Removal
•Warnings and Cautions
•Port Adapter Slot Divider
•Port Adapter Removal and Installation
Each port adapter circuit board is mounted to a metal carrier and is sensitive to electrostatic discharge (ESD) damage.
Note When a port adapter slot is not in use, a blank port adapter must fill the empty slot to allow the router or switch to conform to electromagnetic interference (EMI) emissions requirements and to allow proper airflow across the port adapters. If you plan to install a new port adapter in a slot that is not in use, you must first remove the blank port adapter.
When powering off the router, wait a minimum of 30 seconds before powering it on again.
Handling Port Adapters
Always handle the port adapter by the carrier edges and handle; never touch the port adapter components or connector pins. (See
Figure 3-1 Handling a Port Adapter
Always handle the VIP by the carrier edges and handle; never touch the VIP components or connector pins. (See
Figure 3-2 Handling the VIP—Horizontal Orientation Shown
Online Insertion and Removal
You can remove and replace the PA-A3 OC-12 together with the VIP it is installed on while the system is operating; you do not need to notify the software or reset the system power. This functionality enables you to add, remove, or replace the PA-A3 OC-12 with the system online, which provides a method that is seamless to end users on the network, maintains all routing information, and ensures session preservation.
After the PA-A3 OC-12 and VIP are reinstalled, 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.
To prevent system problems, do not remove the PA-A3 OC-12 from the VIP motherboard. To install or replace the PA-A3 OC-12, first remove the VIP from its interface processor slot.
It is wise to gracefully shut down the system before removing a port adapter that has active traffic moving through it. Removing a module while traffic is flowing through the ports can cause system disruption. Once the module is inserted, the ports can be brought back up.
Note As you disengage the module from the router or switch, online insertion and removal (OIR) administratively shuts down all active interfaces in the module.
OIR allows you to install and replace modules while the router is operating; you do not need to notify the software or shut down the system power, although you should not run traffic through the module you are removing while it is being removed. OIR is a method that is seamless to end users on the network, maintains all routing information, and preserves sessions.
The following is a functional description of OIR for background information only; for specific procedures for installing and replacing a module in a supported platform, refer to the "Port Adapter Removal and Installation" section.
Each module has a bus connector that connects it to the router. The connector has a set of tiered pins in three lengths that send specific signals to the system as they make contact with the module. The system assesses the signals it receives and the order in which it receives them to determine if a module is being removed from or introduced to the system. From these signals, the system determines whether to reinitialize a new interface or to shut down a disconnected interface.
Specifically, when you insert a module, the longest pins make contact with the module first, and the shortest pins make contact last. The system recognizes the signals and the sequence in which it receives them.
When you remove or insert a module, the pins send signals to notify the system of changes. The router then perfoms the following procedure:
1. Rapidly scans the system for configuration changes.
2. Initializes newly inserted port adapters or administratively shuts down any vacant interfaces.
Note Brings all previously configured interfaces on the module back to their previously installed state. Any newly inserted interface is put in the administratively shutdown state, as if it was present (but not configured) at boot time. If a similar module type is reinserted into a slot, its ports are configured and brought online up to the port count of the originally installed module of that type.
Note Before you begin installation, read Chapter 2, "Preparing for Installation," for a list of parts and tools required for installation.
Warnings and Cautions
Observe the following warnings and cautions when installing or removing port adapters.
Do not slide the VIP all the way into the slot until you have connected all required cables to the PA-A3 OC-12. Trying to do so disrupts normal operation of the router or switch.
Note If a port adapter lever or other retaining mechanism does not move to the locked position, the port adapter is not completely seated in the midplane. Carefully pull the port adapter halfway out of the slot, reinsert it, and move the port adapter lever or other mechanism to the locked position.
To prevent jamming the carrier between the upper and the lower edges of the port adapter slot, and to ensure that the edge connector at the rear of the port adapter mates with the connection at the rear of the port adapter slot, make certain that the carrier is positioned correctly, as shown in the cutaway in the
"VIP—Removing and Installing a Dual-Width Port Adapter" section.
Warning When performing the following procedures, wear a grounding wrist strap to avoid ESD damage to the card. Some platforms have an ESD connector for attaching the wrist strap. Do not directly touch the midplane or backplane with your hand or any metal tool, or you could shock yourself.
Port Adapter Slot Divider
If you are installing a PA-A3 OC-12 on a VIP that has two single-width port adapters installed, then you need to remove the port adapter slot divider as described below:
Step 1 Remove installed single-width port adapters from the slots on both sides of the port adapter slot divider on the VIP.
Step 2 Use a number 1 Phillips screwdriver to remove the four slot divider screws securing the slot divider to the VIP. (See Figure 3-3.)
Step 3 Remove the slot divider and store it in a location where you can retrieve it for use later.
In the event that you need to reinstall the port adapter divider on the VIP, place the slot divider in position on the VIP and secure it with the four slot divider screws.
Figure 3-3 Location of VIP Slot Divider and Screws
Port Adapter Removal and Installation
In this section, the following illustration gives step-by-step instructions on how to remove and install a dual-width port adapter.
VIP—Removing and Installing a Dual-Width Port Adapter