Cisco Systems OC-12/STM-14 Verifying Local and Remote DS3 Port Settings, Selecting a DSU Mode

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Cisco IOS Software Configuration for the 1-Port Channelized OC-12/STM-4 (DS3) Line Card

How to Configure the 1-Port Channelized OC-12/STM-4 (DS3) Line Card

The Cisco Remote Connection Management feature uses two Cisco-proprietary DS3 C-bit parity Far-End Alarm and Control (FEAC) messages that are not used in the American National Standards Institute (ANSI) standard. Table 4 explains the commands that generate the FEAC messages.

Table 4

Far-End Alarm and Control Messages

 

 

 

 

 

 

Confirmation Message

FEAC Code

Default Value

Commands

 

 

 

 

DEFAULT_SUBRATE_CONFIG

0x0CFF

fullrate

Router (config-if)# dsu remote fullrate

 

 

 

 

REMOVE_DEFAULT_SUBRATE_CONFIG

0x08FF

user-configured

Router (config-if)# dsu remote fullrate

 

 

 

 

 

Note The local port and the remote port must have matching configurations.

The following sections explain how to use Cisco IOS commands for Cisco Remote Connection Management. Table 3 lists the command parameters.

Verifying Local and Remote DS3 Port Settings

You can use telnet to determine the DSU mode settings on the remote DS3 port. Once you verify the remote DS3 port settings, you can change the local configuration parameters so that DSU mode settings are the same on both the local and remote DS3 ports. You can set the DSU bandwidth to accept or reject the incoming remote requests from the local DS3 port by entering the dsu remote accept interface configuration command.

Selecting a DSU Mode

The DSU mode supports three third-party DSU vendors—Digital-Link, Kentrox, and Larscom—and the default DSU mode, Cisco. If you use a DSU to make the connection between the Cisco 12000 Series Router and another device, the local DS3 port configuration must match the remote DS3 port configuration. Therefore, if the remote DS3 port uses the Kentrox vendor, a request is sent to the local DS3 port to change the DSU mode to Kentrox, by manually entering the dsu mode configuration command and specifying the Kentrox DSU. If you make a direct connection between a Cisco 12000 Series Router and another device, you can use the default DSU mode, Cisco. See Figure 2 for configuration examples.

Setting the Sending and Receiving Rate

The local and remote DS3 ports must also agree on whether to use a subrate or fullrate sending and receiving rate, because the speed of the sending and receiving rate is regulated by the DSU mode. If the sending and receiving rates do not match, they will not work. Subrates are specific to DSU modes and must be configured appropriately. The subrate sending and receiving rate is slower and less expensive than the faster, more expensive, fullrate. You can synchronize the local and remote DS3 ports sending and receiving rates by entering the dsu remote interface configuration command.

Configuring the DSU Bandwidth Range

The DSU bandwidth range is from 0 to 44210 kbps. The local port and the remote port must have matching configurations. Therefore, if you reduce the effective bandwidth to 3000 on the local port, you must do the same on the remote port by entering the dsu bandwidth interface configuration command.

Cisco IOS Release 12.0(8)S

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Contents Contents Router# show controller oc12 1/0 Configuring the OC-12 ControllerRouterconfig# controller OC12 1/0 Router# configure terminalConfiguration Command Default Value Configuring the DS3 Serial InterfaceCisco Remote Connection Management Routerconfig# interface serial 1/01Routerconfig-if#ip address 10.1.2.3 Router# copy running-config startup-configNo dsu bandwidth Kilobits/sec No dsu modeNo framing c-bit m13 Cisco digital-link kentrox larscomConfiguring the DSU Bandwidth Range Verifying Local and Remote DS3 Port SettingsSelecting a DSU Mode Setting the Sending and Receiving RateEnabling Payload Scrambling Using show Commands to Check System StatusConfiguring Cyclic Redundancy Checks Configuring the Clock SourceRouter# show controllers oc12 1/0 Show controllers oc12 slot/portShow controllers oc12 detail Show controllers oc12 slot/portchannel#Router# show controllers oc12 1/01 Ip subnet-zero Router# show running-configOC-12 Controller Loopback Mode Using Loopback CommandsLoopback modes Configuration Mode Command DS3 Channel Loopback Mode Configuring DS3 Port BER TestingNo loopback local network remote configuration command Bert Pattern To Invoke Command Checking Bit Errors Using a BertUsing show Commands to Verify Bert Configuration Entering Errors in BER TestsRouter# show controller oc12 1/01 bert Bert Bert Information ExplanationBert Information Explanation Routerconfig-if#ip address 1.1.5.1 Description Link Related DocumentsTechnical Assistance Related Topic Document Title

OC-12/STM-14 specifications

Cisco Systems OC-12/STM-14 is a high-performance networking solution designed to meet the demands of modern telecommunications and data transport applications. Operating at a data rate of 622 Mbps, the OC-12 (Optical Carrier level 12) and STM-14 (Synchronous Transport Module level 14), this technology provides a reliable and efficient method for organizations to transmit large volumes of data over fiber optic networks.

One of the key features of the OC-12/STM-14 system is its capability for high-speed data transfer. This makes it an ideal choice for service providers looking to deliver broadband services, video streaming, and other bandwidth-intensive applications. With support for multiple protocols, including SONET (Synchronous Optical Network) and SDH (Synchronous Digital Hierarchy), the OC-12/STM-14 can facilitate smooth communication and interoperability between various network devices.

Another significant characteristic of the OC-12/STM-14 is its scalability. Organizations can easily scale their networks by adding additional OC-12/STM-14 connections, accommodating their growing bandwidth needs without a complete overhaul of existing infrastructure. This flexibility is essential for businesses that expect fluctuations in data traffic or are anticipating future expansion.

Additionally, Cisco's OC-12/STM-14 employs advanced error correction and fault tolerance features, ensuring high reliability and minimal downtime. It supports sophisticated monitoring and network management capabilities, allowing administrators to proactively manage network performance and troubleshoot potential issues before they affect service quality.

Security is also a critical aspect of the OC-12/STM-14 architecture. Cisco incorporates robust security protocols to safeguard sensitive data during transmission, ensuring compliance with industry standards and protecting against unauthorized access.

In terms of compatibility, the Cisco OC-12/STM-14 integrates seamlessly with existing infrastructure and can work alongside various routing platforms. This compatibility significantly reduces the cost and complexity associated with upgrading legacy systems.

Ultimately, Cisco Systems OC-12/STM-14 offers a powerful solution for enterprises and service providers looking to enhance their networking capabilities. With its high-speed data transfer, scalability, reliability, and security features, it stands as a cornerstone technology in advanced telecommunications and data networking.
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