Cisco Systems PA-2H manual Attaching a Null Modem Cable

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Attaching a Null Modem Cable

Figure 7-1 Connecting HSSI Cables (Front View—PA-2H Shown without Handle)

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To T3, E3, or SONET DSU

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 HSSI port adapter. If you require a null modem cable for your HSSI connection, refer to the section “Attaching a Null Modem Cable,” which follows; otherwise, proceed to the “Configuring the HSSI Interfaces” section on page 7-3.

Attaching a Null Modem Cable

This section describes the procedure for attaching null modem cables to HSSI port adapters.

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 7500 series routers, two Cisco 7200 series routers, two Cisco uBR7200 series routers, or one of each. This setup allows you to 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 1-1 in the “HSSI Null Modem Cable” section on page 1-5.

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-clockcommand to enable the internal transmit clock on the HSSI.

You define Cisco 7000 series and Cisco 7500 series interfaces by type and physical slot/port adapter/port locations. You define Cisco 7200 series and Cisco uBR7200 series interfaces by type and port adapter slot number/port locations. You define the Catalyst RSM/VIP2 in the Catalyst 5000 family switches by port adapter slot number/port location. (The output of the show interfaces command displays the logical unit number on all supported platforms and the physical slot/port adapter/port location in the Cisco 7000 series and Cisco 7500 series, or the port adapter slot number/port location in the Cisco 7200 series and Cisco uBR7200 series routers and the Catalyst RSM/VIP2.)

7-2PA-2H Dual-Port HSSI Port Adapter Installation and Configuration

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Contents Corporate Headquarters Copyright 1996-1999, Cisco Systems, Inc All rights reserved Document Objectives About This ManualDocument Organization Cisco Connection Online Cisco Connection OnlineDocumentation CD-ROM If You Need More InformationIf You Need More Information If You Need More Information If You Need More Information Overview Port Adapter Overview605559 LEDs Receptacles, Cables, and Pinouts Hssi Interface CableNull Modem Cable Connectors Hssi Null Modem CableReceptacles, Cables, and Pinouts Preparing for Installation List of Parts and ToolsSoftware and Hardware Requirements Platform Minimum Cisco IOS ReleaseSafety Guidelines Safety WarningsSafety Guidelines Electrical Equipment Guidelines Telephone Wiring GuidelinesPreventing Electrostatic Discharge Damage FCC Class B Compliance Installation Overview VIP2 and the Dual-Port Hssi Port AdapterVIP2-50 with Two Hssi Port Adapters in Port Adapter Slots 0 Removing a Port Adapter Location of Port Adapter Screw Partial Port Adapter ViewInstalling a Port Adapter Installing a New Port AdapterInstalling a Port Adapter Installation Overview Catalyst RSM/VIP2 and the Dual-Port Hssi Port Adapter Catalyst RSM/VIP2-40 with PA-2H in Port Adapter Slot Removing a Port Adapter Installing a Port Adapter Installing a New Port Adapter Installation Overview Cisco 7200 Series and the Dual-Port Hssi Port Adapter Cisco 7206 with an Hssi Port Adapter in Port Adapter SlotPort adapter Handle Lever unlocked Position Replacing a Port Adapter Handling a Port AdapterSlot Port adapter Installation Overview Cisco uBR7200 Series Dual-Port Hssi Port Adapter Port adapters Port adapters Port adapter lever in unlocked position Inside slot guide PC board Metal carrier Port adapter retention clip in locked position Installation Overview Cable Installation and Interface Configuration Attaching Hssi Port Adapter Interface CablesConnecting Hssi Cables Front View-PA-2H Shown without Handle Attaching a Null Modem CableConfiguring the Hssi Interfaces Cisco 7200 Series and Cisco uBR7200 Series Ports Cisco 7206 Hssi Port Number Example Configuring Interfaces VIP2 PortsConfiguring Interfaces Configuring Cyclic Redundancy Checks Checking the ConfigurationUsing show Commands to Verify the New Interface Status Cisco 7200 Series and Cisco uBR7200 Series show Commands Use the show diag command to display the hardware revision VIP2 show Commands FF FF FF FF FF FF FF FF Catalyst RSM/VIP2 show Commands Router# show version FF FF FF FF FF FF FF FF Using the ping Command Router# pingConfiguring the Hssi Interfaces
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