Cisco Systems PA-POS-2OC3, PA-POS-1OC3 manual Configuring Cyclic Redundancy Checks

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Chapter 4 Configuring the PA-POS-1OC3

Customizing the Configuration

Step 2 To restore loop timing, enter the no clock source internal command or the clock source line command.

Router(config)# interface pos 3/0

Router(config-if)#no clock source internal

Configuring Cyclic Redundancy Checks

The cyclic redundancy check (CRC) default is for a 16-bit CRC. The CRC is an error-checking technique that uses a calculated numeric value to detect errors in transmitted data. The PA-POS-1OC3 also supports a 32-bit CRC. The sender of a data frame calculates the frame check sequence (FCS). The sender appends the FCS value to outgoing messages. The receiver recalculates the FCS and compares it to the FCS from the sender. If a difference exists, the receiver assumes that a transmission error occurred and sends a request to the sender to resend the frame.

Step 1 To configure an interface for a 32-bit CRC, enter the crc 32 command:

Router(config)# interface pos 3/0

Router(config-if)# crc 32

Step 2 To disable the 32-bit CRC and return the interface to the default 16-bit CRC, enter the no crc 32 command.

Router(config)# interface pos 3/0

Router(config-if)# no crc 32

Configuring SONET Payload Scrambling

The default is for SONET payload scrambling to be disabled. SONET payload scrambling applies a self-synchronous scrambler (x^43+1) to the Synchronous Payload Envelope (SPE) of the OC-3 interface to ensure sufficient bit-transition density.

Note Both ends of the connection must use the same scrambling algorithm.

You enable SONET payload scrambling using the pos scramble-atmcommand. (This command has no keywords or arguments.)

Step 1 To enable SONET payload scrambling, use the following command sequence:

Router(config)# interface pos 3/0

Router(config-if)# pos scramble-atm

Router(config-if)# no shutdown

Router(config-if)# end

Step 2 To verify that SONET payload scrambling is enabled on an interface, enter the show startup-configcommand. If scrambling is enabled, the following line is displayed in the configuration:

pos scramble-atm

PA-POS-1OC3 Single-Port Port Adapter Installation and Configuration Guide

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Contents Americas Headquarters Text Part Number OL-6514-04Copyright 2007 Cisco Systems, Inc. All rights reserved N T E N T S Cisco 7401ASR Router Cisco 7401ASR Router-Removing and Installing a Port Adapter OL-6514-03 Version Date Document Version HistoryObjectives Section Title Description OrganizationRelated Documentation Preface Related Documentation OL-6514-04 PA-POS-1OC3 Overview PA-POS-1OC3 OverviewSONET/SDH Overview SDH EquivalentFeatures Interface Specifications OC-3 Optical Fiber SpecificationsNetwork Management Support Encapsulation Method Support Using Statistics to Estimate Link Loss and Power BudgetLEDs LED Label Color State FunctionCables and Connectors RCVPort Adapter Slot Locations on the Supported Platforms Cisco 7200 VXR Routers Slot NumberingCisco 7201 Router Slot Numbering Cisco 7200 Series VXRCisco 7301 Router Slot Numbering Cisco 7304 PCI Port Adapter Carrier Card Slot NumberingCisco 7401ASR Router Slot Numbering Module Slots on the Cisco 7304 RouterCisco 7500 Series Routers with VIP Slot Numbering 10 VIP Slot LocationsCisco 7505 Router Slot Numbering RSPCisco 7507 Router Slot Numbering VIP interface-slot RSP-slotCisco 7513 Router Slot Numbering 6 8 10Cisco 7603 Router Slot Numbering SUPERVISOR2Cisco 7606 Router Slot Numbering Cisco 7609 Router Slot Numbering FAN StatusCisco 7613 Router Slot Numbering Identifying Interface Addresses Platform Interface Address Format Numbers SyntaxCisco 7301 Router Interface Addresses Cisco 7200 VXR Routers Interface AddressesCisco 7201 Router Interface Addresses Cisco 7401ASR Router Interface Addresses Cisco 7500 Series Routers VIP Interface AddressesCisco 7600 Series Routers FlexWAN Module Interface Addresses OL-6514-04 Preparing for Installation Required Tools and EquipmentPlatform Recommended Minimum Cisco IOS Release Software and Hardware RequirementsCisco 7200 VXR Routers Checking Hardware and Software Compatibility Safety Guidelines Safety WarningsAviso Instruções Importantes DE Segurança Warnung Wichtige SicherheitshinweiseAvvertenza Importanti Istruzioni Sulla Sicurezza Guarde Estas Instrucciones GEM Disse Anvisninger OL-6514-04 Electrical Equipment Guidelines Telephone Wiring Guidelines Preventing Electrostatic Discharge DamageLaser Safety FCC Class a ComplianceOL-6514-04 Removing and Installing the PA-POS-1OC3 Handling Port AdaptersOnline Insertion and Removal Handling a Port AdapterOIR Functional Description Port Adapter Removal and Installation Step Cisco 7201 Router-Removing and Installing a Port Adapter CiscoCisco 7301 Router-Removing and Installing a Port Adapter OL-6514-04 CC-PA Cisco 7401ASR Router-Removing and Installing a Port Adapter With the screw removed, grasp Screw Connecting PA-POS-1OC3 Interface Cables TX RXRemoving the SFP Optics Module Replacing the SFP Optics ModuleHandling the SFP Optics Module Installing the SFP Optics Module Verifying the SFP Optics Module Installation Inserting an SFP Optics ModulePage OL-6514-04 Configuring the PA-POS-1OC3 Using the Exec Command InterpreterConfiguring the Interfaces Parameter Configuration Commands Default ValuePlatform Command Example Shutting Down an InterfaceSlot/port-adapter/port Show interfaces pos, followed by Performing a Basic Configuration Show interfaces pos followed byInterface pos, followed by Customizing the Configuration Setting the Source of the Transmit Clock Setting the MTU SizeConfiguring Framing Configuring Cyclic Redundancy Checks Configuring Sonet Payload ScramblingConfiguring APS Basic APS ConfigurationCommand Function Example Checking the ConfigurationUsing show Commands to Verify the New Interface Status Show controllers Using the show version or show hardware Commands Cisco 7201 Router-Example Output of the show version Command Router#show version Using the show diag Command Port adapter is analyzedCisco 7201 Router-Example Output of the show diag Command Router#show diag Using the show interfaces Command Router# show interfaces pos 4/0 PE3#sh int pos4/1Router# show interfaces Using the ping Command to Verify Network Connectivity Router# ping 10.0.0.10 ReturnConfiguring an Interface for Line Loopback Using loopback CommandsConfiguring an Interface for Internal Loopback Push Mode Description Making a Back-to-Back Connection PA-POS-1OC3 Error MessagesPA-POS-1OC3 Statistics Counters First routerConfiguring the PA-POS-1OC3 Making a Back-to-Back Connection

PA-POS-1OC3, PA-POS-2OC3 specifications

Cisco Systems has long been at the forefront of networking technology, providing solutions that empower organizations to enhance their connectivity and communication capabilities. Among its impressive lineup, the PA-POS-2OC3 and PA-POS-1OC3 modules stand out as significant components designed to optimize performance in service provider and enterprise environments.

The PA-POS-2OC3 and PA-POS-1OC3 modules are designed for use with the Cisco 7600 Series routers and are tailored for Packet Over SONET (POS) transport. Supporting the OC-3 speed of 155.52 Mbps, these modules provide reliable high-speed connectivity, enabling organizations to efficiently manage data traffic and ensure rapid data transfer across their networks. The PA-POS-2OC3 offers dual OC-3 capabilities, allowing for higher aggregate bandwidth and redundancy options, making it common in demanding network environments.

One of the main features of the PA-POS-2OC3 and PA-POS-1OC3 is their enhanced support for advanced networking protocols, including MPLS (Multiprotocol Label Switching). MPLS facilitates efficient data routing and improves bandwidth utilization by enabling multiple types of traffic to be consolidated over a single network. This is crucial for organizations looking to deploy services like VoIP, video conferencing, and other bandwidth-intensive applications.

The modules also offer robust error correction and monitoring capabilities, which are essential for maintaining service quality in mission-critical applications. Administrators can monitor performance and diagnose issues in real-time, enabling swift responses to potential concerns that could disrupt service.

Moreover, the PA-POS-2OC3 and PA-POS-1OC3 are designed with features that support enterprise-grade security and scalability. This is particularly beneficial for organizations expecting growth or requiring enhanced protection for sensitive data as it traverses the network.

In summary, Cisco's PA-POS-2OC3 and PA-POS-1OC3 modules represent essential building blocks for high-speed networking solutions. Their support for OC-3 connectivity, advanced routing protocols, and robust monitoring capabilities make them ideal for both service providers and enterprises. Through increased scalability, improved bandwidth management, and enhanced security, these modules allow organizations to adapt to the ever-evolving landscape of data communications effectively. With Cisco at the helm, businesses can trust in a networking solution that not only meets current demands but is also primed for future growth.
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