Chapter 4 Configuring the PA-POS-1OC3

Push Mode Description

Step 1 To configure an interface for line loopback, enter the loop line command:

Router(config)# interface pos 3/0

Router(config-if)# loop line

Step 2 To disable line loopback, enter the no loop line command.

Router(config)# interface pos 3/0

Router(config-if)# no loop line

For more information about interface subcommands and the configuration options available for the supported routers, refer to the publications listed in the “Related Documentation” section on page viii.

Push Mode Description

If you have not been advised by Cisco to use the information in this section, do not do so.

The PA-POS-1OC3 and PA-POS-2OC3 port adapters support a different algorithm (from that of most port adapters) for handling data. On the transmit side, it can either pull packets from the CPU (Pull mode) or push packets from the CPU to the port adapter (Push mode). The PA-POS-1OC3 and PA-POS-2OC3 port adapters were developed with a software architecture that deviates from the design of previously developed port adapters. A majority of the port adapters allow data to be pulled from the CPU to their interfaces. Because a few corner-case conditions exist, you may require the ability to configure the PA-POS-1OC3 and PA-POS-2OC3 port adapters to behave the same as the rest of the port adapter product family. The new CLI described in this section allows the customer to change the PA-POS-1OC3 and PA-POS-2OC3 port adapters Push mode behavior to the standard Pull mode.

Caution Only customers who have been advised by Cisco to use this CLI should do so. If you have not been advised by Cisco to use the dma model pull enable command, do not do so.

Note Changing from Push mode to Pull mode is applicable only on a Cisco 7200 VXR router with an NPE-G1 and PA-POS-1OC3 or PA-POS-2OC3 installed.

Note We recommend changing the mode during a standard maintenance window.

The Pull Mode is supported on Cisco IOS Release 12.4(15)T1.

To change the TX DMA mode from the default Push mode to Pull mode, follow these steps:

Enter the dma model pull enable command to change the Push mode to Pull mode. When the dma model pull enable command is executed, all the PA-POS-1OC3 and PA-POS-2OC3 port adapters installed are soft OIRed to reinitialize them to Pull mode.

To change the Pull mode to Push mode, enter the no dma model pull enable command. When the no dma model pull enable command is executed, all the PA-POS port adapters are soft OIRed to reinitialize them to Push mode.

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Cisco Systems PA-POS-2OC3, PA-POS-1OC3 manual Push Mode Description

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.