Cisco Systems 8xDMT manual Dmt rate-adaptation interval, Defaults Command Modes Command History

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Octal-Port DMT ATU-C Line Card

dmt rate-adaptation interval

dmt rate-adaptation interval

To change the intervals during which a DMT port is monitored for signal-to-noise ratio (SNR) margins, use the dmt rate adaptation interval command in DSL profile configuration mode. To disable

dmt rate adaptation interval, use the no form of this command.

dmt rate-adaptation interval {downshift [downstream number-ofeoc-updatesupstream seconds]}

Syntax Description

downshift

The downshift keyword indicates that a line with excessive SNR margins retrains

 

 

to a lower bit rate.

 

 

 

 

downstream

The downstream keyword tells IOS to monitor downstream ports for SNR margins

 

 

exceeding those specified in the dmt rate-adaptation margin command.

 

 

 

 

number-of

The number-ofeoc-updatesargument specifies the monitoring interval in multiples

 

eoc-updates

of six seconds on a downstream DMT port.

 

 

Note The downstream margin (see “dmt rate-adaptation margin” section on

 

 

page 24) is obtained from the CPE via the embedded operations channel

 

 

(EOC). The downstream number-ofeoc-updatesparameter specifies a

 

 

number of consecutive EOC read events. Depending upon the type of CPE,

 

 

EOC messages are sent once every 6 to 15 seconds (not counting EOC

 

 

timeouts). Hence, a downstream downshift interval value of 10 on CPE

 

 

reporting margins every 6 seconds results in a 1 minute monitoring interval

 

 

(10x6 seconds). Specifying a downstream downshift interval value of 10 on

 

 

CPE that report margins every 15 seconds (10x15 seconds) yields a 2.5

 

 

minute monitoring interva1.

 

 

 

 

upstream

The upstream keyword tells IOS to monitor upstream ports for SNR margins

 

 

exceeding those specified in the dmt rate-adaptation margin command.

 

 

 

 

seconds

The seconds argument specifies the monitoring interval in seconds on an upstream

 

 

DMT port.

 

 

 

Defaults

Command Modes

Command History

Following are the default settings for the dmt rate adaptation interval:

•downstream— 10

Note Remember, a downstream value of 10 can yield a monitoring interval between 1 minute to

2.5minutes in length.

•upstream—10

DSL profile configuration

ReleaseModification

IOS 12.1(6)DA

This command was introduced.

 

 

Cisco IOS Release 12.1(6)DA

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Contents Feature Overview Octal-Port DMT ATU-C Line CardFast or Interleaved Path Selection Hs Support ITU G.994.1Bit Swapping Trellis EncodingMinrate-blocking Dmt rate-adaptation Hardware Documents Software DocumentsDSLAMs Supported PlatformsNumber of Available 8xDMT Chassis Slots Standard Mibs Supported Standards, MIBs, and RFCsStandards Cisco-Derived MibsCommand Purpose Configuration TasksPrerequisites Select the profile that you want to attach to Enter DSL profile configuration modeUpstream on the fast path. Automatically configures Selected port. The profile name 8xDMT is used asMonitoring and Maintaining the 8xDMT Line Card Configuration Examples Current configuration 7019 bytesCommand Reference Syntax Description Defaults Command Modes Command History AlarmsAlarms Release ModificationCommand Description ExamplesCommand Modes Command History Dmt bitrateDownstream Upstream Path Aggregate Configuration Data Range DefaultThose port settings Path KbpsValues for the connection You, use the dmt bitrate command to reduce the bit rateDmt check-bytes Downstream and 6 upstreamRelated Commands None Dmt margin downstream dmt-marginupstream dmt-margin Dmt marginReleaseModification IOS 12.16DA This command was introduced Syntax Description Defaults Command ModesCommand History Release Modification Dmt minrate-blockingDmt overhead-framing Defaults Command Modes Command History Usage GuidelinesSyntax Description T1.413 and G992.1 G992.2 Framing Mode Downstream Upstream Related Commands DescriptionDmt rate-adaptation enable Dmt rate-adaptation enableAdaptation, use the no form of the command This command has no arguments or keywordsDefaults Command Modes Command History Dmt rate-adaptation intervalUpstream monitoring interval is 20 seconds Dmt rate-adaptation margin min downstream dB upstream dB Dmt rate-adaptation marginMin None Global configuration SlotUsage Guidelines Examples Glossary Pseudonym for G.992.1 Loss of signal Loss Of Delay SynchronizationProblem is found Loss of Cell DelineationProviding reliable, connection-oriented full-duplex streams LAN. Has no password securityRemote host and act as normal terminal users of that host VCI VPI

8xDMT specifications

Cisco Systems’ 8xDMT, or "Eightfold Digital Multicast Technology," is a pioneering solution designed to optimize multicast traffic management and enhance the scalability of network performance. This technology comes into play primarily in video broadcasting, online gaming, and other applications that require the efficient distribution of data to multiple endpoints, significantly reducing the bandwidth use while improving overall network efficiency.

One of the primary features of Cisco 8xDMT is its ability to support multiple multicast streams concurrently. By using advanced algorithms, 8xDMT ensures that network resources are utilized efficiently, minimizing latency and maximizing throughput. This makes it particularly advantageous for service providers and organizations that deliver high-definition video content or require real-time data transmission across geographic locations.

Another notable characteristic of the Cisco 8xDMT is its integrated Quality of Service (QoS) capabilities. This feature allows for the prioritization of multicast traffic, ensuring that critical data packets are transmitted smoothly without delay, even during peak load times. The QoS management allows administrators to configure settings that guarantee minimal disruptions, providing end users with a seamless viewing or gameplay experience.

Additionally, Cisco 8xDMT takes advantage of Multicast Domain Name System (mDNS), which allows devices on the same network to discover and communicate efficiently. This not only aids in reducing the network load but also simplifies the management of multicast addresses, making it easier for organizations to scale their operations without significant overhead.

The technology also incorporates robust security features, including support for secure multicast transmissions. This ensures that sensitive data remains protected during distribution, addressing the increasing need for security in an era where cyber threats are prevalent.

Furthermore, Cisco Systems emphasizes interoperability with its 8xDMT platform, ensuring easy integration with existing network infrastructure. This is crucial for enterprises looking to modernize their systems without the need for extensive reinvestment in new hardware.

In conclusion, Cisco Systems’ 8xDMT stands out as a versatile and high-performance multicast solution designed to meet modern networking demands. With its ability to manage multiple streams, enforce QoS, simplify multicast management, and secure communications, it holds significant potential for transforming how organizations distribute data efficiently and effectively.
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