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This chapter describes how to remove the PA-2H port adapter from supported platforms, how to install a new or replacement port adapter, and how to connect cables. 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.
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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. |
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Caution Always handle the port adapter by the carrier edges and handle; never touch the port adapter components or connector pins. (See Figure 3-1.) |
Several platforms support online insertion and removal (OIR) of port adapters; therefore, you do not have to power down routers when removing and replacing a PA-2H on Cisco 7100 series routers, Cisco 7200 series routers or Cisco uBR7200 series routers.
Although the VIP2, the VIP4, and the Catalyst RSM/VIP2 support online insertion and removal, individual port adapters do not. To replace port adapters, you must first remove the VIP2, VIP4, or Catalyst RSM/VIP2 from the chassis, and then install or replace port adapters as required. If a blank port adapter is installed on the VIP2, VIP4, or Catalyst RSM/VIP2 on which you want to install a new port adapter, you must first remove the VIP2, VIP4, or Catalyst RSM/VIP2 from the chassis, and then remove the blank port adapter.
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Caution To prevent system problems, do not remove port adapters from the VIP2, VIP4, or Catalyst RSM/VIP2 motherboard or attempt to install other port adapters on the motherboard when the system is operating. To install or replace port adapters, first remove the VIP2, VIP4, or Catalyst RSM/VIP2 from its interface processor slot. |
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Note As you disengage the port adapter from the router or switch, online insertion and removal (OIR) administratively shuts down all active interfaces in the port adapter. |
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Note Before you begin installation, read "Preparing for Installation," for a list of parts and tools required for installation. |
Observe the following warnings and cautions when installing or removing port adapters.
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Caution Do not slide a port adapter all the way into the slot until you have connected all required cables. Trying to do so disrupts normal operation of the router or switch. |
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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. |
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Caution 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 following illustrations. |
In this section, the illustrations that follow give step-by-step instructions on how to remove and install port adapters in each of the following supported platforms:
This section describes the procedures for connecting HSSI cables and null modem cables to the PA-2H.
This section describes the procedure for connecting HSSI cables to a PA-2H port adapter.
On a single PA-2H, you can use up to two HSSI connections. HSSI cables are available only from Cisco Systems; they are not available from outside commercial cable vendors.
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Caution Although the HSSI connector and the HSSI cable are similar to the SCSI-II format, they are not identical. The HSSI cable specification is more restrictive than that for the SCSI-II. If a SCSI-II cable is used instead of an HSSI cable, proper operation cannot be guaranteed |
Use the following procedure to connect HSSI cables to a PA-2H:
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Note Port adapters have a handle attached, but this handle is not shown in Figure 3-2. The HSSI cable plug and HSSI port receptacle are keyed for proper connection. Use the HSSI cable strain relief slide locks whenever HSSI cables are connected to the receptacles on the PA-2H. |
Step 2 Attach the network end of your HSSI cables to your T3, E3, or SONET DSU, or other external HSSI equipment.
This completes the procedure for attaching HSSI cables to the PA-2H. If you require a null modem cable for your HSSI connection, see the "Connecting a Null Modem Cable" section that follows; otherwise, proceed to the Chapter 4, "Configuring the PA-2H."
This section describes the procedure for connecting a null modem cable to a PA-2H port adapter.
The null modem cable can connect two routers directly back to back. The two routers must be in the same location, and can be two Cisco 7000 series routers, two Cisco 7100 series routers, two Cisco 7500 series routers, two Cisco 7200 series routers, two Cisco uBR7200 series routers, or one of each. With this setup you can verify the operation of the HSSI or to directly link the routers in order to build a larger node. The null modem cable uses the same 50-pin connectors as the HSSI cable, but uses the pinouts listed in Table 1-3 in the "HSSI Null Modem Cable" section.
To connect two routers, attach a null modem cable between an HSSI port on each router. Enable the internal transmit clock in both routers by entering the command hssi internal-clock. All router platforms use the same hssi internal-clock command to enable the internal transmit clock on the HSSI.
You define Cisco 7000 series and Cisco 7500 series interfaces by type and interface-processor-slot-number/port-adapter-slot-number/interface-port locations. You define Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series interfaces by type and port-adapter-slot-number/interface-port locations. You define the Catalyst RSM/VIP2 in Catalyst 5000 family switches by port-adapter-slot-number/interface-port locations. (The output of the show interfaces command displays the logical unit number on all supported platforms and the interface-processor-slot-number/port-adapter-slot-number/interface-port location in the Cisco 7000 series and Cisco 7500 series, or the port-adapter-slot-number/interface-port location in the Cisco 7100 series, Cisco 7200 series, and Cisco uBR7200 series routers, and the Catalyst RSM/VIP2.)
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Note In the Cisco 7206 and Cisco 7206VXR router shelves, you define interfaces by type and physical-shelf/port-adapter/port locations. For information on Cisco 7206 and Cisco 7206VXR router shelf physical port addresses, see the "Identifying Interface Addresses" section in Chapter 1. |
The following examples show the configuration commands needed to prepare for a null modem cable connection in all supported platforms:
Router# configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router(config)#
Enter configuration commands...
Router(config)# interface hssi 1/0/0 Router(config-if)# hssi internal-clock
Router(config-if)# Ctrl-Z
Router(config)# interface hssi 0/0 Router(config-if)# hssi internal-clock
Router(config-if)# Ctrl-Z
For Cisco 7100 series:
Router(config)# interface hssi 3/0
Router(config-if)# hssi internal-clock
Router(config-if)# Ctrl-Z
For Cisco 7200 series and Cisco uBR7200 series:
Router(config)# interface hssi 1/0
Router(config-if)# hssi internal-clock
Router(config-if)# Ctrl-Z
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Note For the Cisco 7206 and Cisco 7206VXR router shelves, the interface address specified in the Cisco 7200 series example above would be preceded by a shelf number. For example, the command interface hssi 5/1/0 specifies the first interface of the port adapter in slot 1 of Cisco 7206 or Cisco 7206VXR router shelf 5. |
Be sure to configure the HSSI port on both routers for an internal transmit clock. When the internal clock is enabled, the TC LED on the PA-2H goes on. When the internal clock is enabled in both routers, the TC and RC LEDs on both of the connected HSSI ports go on.
When you disconnect the null modem cable, you must also disable the internal transmit clock with the command no hssi internal-clock. Use this command to turn off the transmit clock for each interface on both routers.
This completes the procedure for attaching a null modem cable to your PA-2H.
Proceed to Chapter 4, "Configuring the PA-2H."
Posted: Thu Apr 27 20:55:34 PDT 2000
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