Automatic Protection Switching on the PXM

Using an example of 100% of the bandwidth on one logical port 1:

addport 1 1 100 1 200

where the first “1” is the logical port number; the second “1” is the line number on the PXM back card to which you are assigning this logical port number; “100” is the percentage of bandwidth this port has in both directions; and the VPI range is 1–200.

Step 5 If necessary, use cnfportrscprtn to modify port-level resources for a controller:

cnfportrscprtn <port_no> <controller> <ingress_%BW> <egress_%BW>

•<min_VPI> <max_VPI> <min_VCI> <max_VCI> <max_GLCNs>

•port_no is the logical port number in the range 1–32 for user-connections or 34 for inband ATM PVCs for network management.

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controller is a string identifying the network controller—”PAR,” “PNNI,” or “TAG.”

ingress_%BW is the percentage of ingress bandwidth in the range 0–100.

egress_%BW is the percentage of egress bandwidth in the range 0–100.

min_vpi is the minimum VPI in the range 0–4095.

max_vpi is the maximum VPI in the range 0–4095.

min_vci is the minimum VCI in the range 0–65535.

max_vci is the maximum VCI in the range 0–65535.

max_chans is the maximum GLCNS in the range 0–32767.

Step 6 On a stand-alone node, specify the cell header type as needed by executing cnfatmln.

cnfatmln <line_num> <type>

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line_num is the line number in the range 1–4.

type is either 2 for UNI or 3 for NNI (the default).

UNI cell headers typically apply where a workstation connects through a line to a PXM UNI port (rather than a SLIP-based port on the PXM-UI card). Such an implementation is not common, so cnfatmln usually is not necessary.

Automatic Protection Switching on the PXM

Automatic Protection Switching (APS) provides redundancy for an OC-3 or OC-12 line on the PXM if a failure occurs someplace other than the PXM front card. The failure can originate on the daughter card, uplink card, or any part of the physical line. With APS, the active PXM remains active and passes the cells from the failed line-path through the redundant line. The advantage of APS is that a line switchover requires significantly less time than a full PXM switchover. (A failure of the PXM front card in a redundant system causes the entire PXM card set to switch over.) As defined in GR-253, a variety of APS modalities are possible (see the command summaries that follow).

The current requirements for APS service on an MGX 8850 switch are:

•Redundant PXMs (currently, the PXM does not support an APS configuration where the working and protection lines on the same uplink card).

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A“B” version of an OC-3 or OC-12 back card (SMLR-1-622/B, and so on). The connected network switch or CPE must also support APS.

Card and Service Configuration 6-7

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Cisco Systems MGX-FRSM-HS2, MGX-FRSM-2CT3, MGX-FRSM-2T3E3 Automatic Protection Switching on the PXM, Cnfatmln linenum type
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MGX-FRSM-HS2, MGX-FRSM-2T3E3, MGX-FRSM-2CT3 specifications

Cisco Systems is a leader in networking technology and infrastructure, providing solutions that drive innovation and efficiency for businesses worldwide. Among its diverse range of products, the MGX series stands out as a pivotal component for the network-centric era, especially with models like MGX-FRSM-2CT3, MGX-FRSM-2T3E3, and MGX-FRSM-HS2. These modules are primarily designed for the MGX 8800 series routers, facilitating efficient traffic management and service delivery.

The MGX-FRSM-2CT3 is a versatile module that supports two T3 connections. It allows network operators to seamlessly integrate high-capacity circuit-switched and packet-switched data on a unified platform. This versatility is crucial for service providers looking to enhance their bandwidth offerings while ensuring reliable performance across voice, video, and data applications.

In contrast, the MGX-FRSM-2T3E3 module caters to operators needing E3 support. This feature allows for efficient data transport over a broader bandwidth, catering to European standards. The E3 configuration is vital for service providers operating in Europe or regions that utilize E3 technology prominently.

The MGX-FRSM-HS2 module is another significant offering, designed to accommodate the increasing demand for high speed and high capacity. It supports higher-order TDM and packet technologies, enabling operators to implement advanced services such as VoIP, video conferencing, and other data-intensive applications. This module provides scalability and reliability, making it ideal for next-generation networks.

All three modules leverage Cisco’s advanced switching and routing technology, ensuring optimal performance and minimal latency. The integration of Quality of Service (QoS) features allows network administrators to prioritize traffic types effectively, ensuring mission-critical applications receive the necessary bandwidth.

Additionally, these MGX modules support various signaling protocols, enabling interoperability with existing network infrastructure while also facilitating the migration to newer technologies. They play an essential role in modernizing telecom networks, allowing service providers to adapt to changing market demands and technology landscapes.

In summary, the Cisco MGX-FRSM-2CT3, MGX-FRSM-2T3E3, and MGX-FRSM-HS2 modules are key components for businesses looking to enhance their networking capabilities. With their robust support for T3 and E3 technologies, high scalability, and advanced QoS features, these modules empower service providers to deliver a wide range of services, drive innovation, and meet the growing demands of users in an increasingly connected world.
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