Chapter 16 CE-100T-8 Ethernet Operation

CE-100T-8 SONET Circuits and Features

CE-100T-8 VCAT Characteristics

The ML-100T-8 card and the CE-100T-8 card (both the ONS 15310-CL version and the ONS 15454 SONET/SDH version) have hardware-based support for the ITU-T G.7042 standard link capacity adjustment scheme (LCAS). This allows the user to dynamically resize a high order or low order VCAT circuit through CTC or TL1 without affecting other members of the VCG (errorless). ML-100T-8 LCAS support is high order only and is limited to a two member VCG.

The ONS 15454 SONET/SDH ML-Series card has a software-based LCAS (SW-LCAS) scheme. This scheme is also supported by both the ML-100T-8 card and both versions of the CE-100T-8, but only for circuits terminating on a ONS 15454 SONET/SDH ML-Series card.

The CE-100T-8 card allows independent routing and protection preferences for each member of a VCAT circuit. The user can also control the amount of VCAT circuit capacity that is fully protected, unprotected or if the circuit is on a bidirectional line switched ring (BLSR), uses protection channel access (PCA). Alarms are supported on a per-member as well as per virtual concatenation group (VCG) basis.

Note The maximum tolerable VCAT differential delay for the CE-100T-8 is 48 milliseconds. The VCAT differential delay is the relative arrival time measurement between members of a virtual concatenation group (VCG).

CE-100T-8 POS Encapsulation, Framing, and CRC

The CE-100T-8 uses Cisco EoS LEX (LEX). LEX is the primary encapsulation of ONS Ethernet cards. In this encapsulation the protocol field is set to the values specified in Internet Engineering Task Force (IETF) Request For Comments (RFC) 1841. The user can provision GPF-F framing (default) or high-level data link control (HDLC) framing. With GFP-F framing, the user can also configure a 32-bit CRC (the default) or no CRC (none). When LEX is used over GFP-F it is standard Mapped Ethernet over GFP-F according to ITU-T G.7041. HDLC framing provides a set 32-bit CRC.

Figure 16-5illustrates CE-100T-8 framing and encapsulation.

Figure 16-5 ONS CE-100T-8 Encapsulation and Framing Options

LEX

 

GFP-F Frame Types

 

 

 

 

Encapsulation

 

GFP-Mapped

 

 

Ethernet (LEX)

 

 

 

 

 

 

 

 

Flag

Address

Control

Protocol

Payload

FCS

 

 

 

 

 

 

 

 

 

 

HDLC Framing Mode

 

or

Core

Payload

Payload

FCS

Header

Header

 

 

 

 

 

 

GFP-F Framing Mode

Transport Overhead

SONET/SDH Payload Envelope

115444

SONET/SDH Frame

Cisco ONS 15310-CL Ethernet Card Software Feature and Configuration Guide, R5.0

 

June 2005

16-9

 

 

 

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Cisco Systems specifications CE-100T-8 Vcat Characteristics, CE-100T-8 POS Encapsulation, Framing, and CRC, 16-9

CE-100T-8 specifications

The Cisco Systems CE-100T-8 is a powerful edge device designed primarily for service provider and enterprise applications. This compact yet robust appliance combines high performance with advanced features for various networking needs, making it a suitable choice for modern networks.

One of the standout characteristics of the CE-100T-8 is its scalability. The device can handle multiple high-throughput applications simultaneously, providing a flexible solution for both small and large networks. With its support for various interfaces, including Ethernet and fiber, it can seamlessly integrate into existing infrastructures, backing the transition towards more advanced networking technologies.

The CE-100T-8 comes with eight Gigabit Ethernet ports, providing ample connectivity options for devices and services. This feature is vital for businesses that require consistent and speedy communication across their networks. The device also incorporates advanced routing capabilities through Cisco's IOS software, offering traditional and advanced routing protocols. This ensures that data is efficiently directed across the network, which is crucial for optimizing performance and reducing latency.

Security is an essential consideration for any networking device, and the CE-100T-8 does not disappoint. It offers built-in security features such as firewall capabilities, intrusion detection, and prevention systems, ensuring that the network remains protected against threats and vulnerabilities. Additionally, the device supports secure connections via Virtual Private Networks (VPNs), further enhancing the security measures available to users.

The CE-100T-8 also supports advanced Quality of Service (QoS) protocols, allowing businesses to prioritize critical traffic and ensure that essential services receive the necessary bandwidth. This can significantly improve the performance of applications such as VoIP and real-time video streaming, making it easier for organizations to adopt digital communication tools.

Moreover, Cisco has integrated management and monitoring features into the CE-100T-8, allowing IT administrators to oversee and manage their networks effectively. This includes features such as Cisco Prime, which provides a robust interface for centralized management, making it easier to configure, monitor, and troubleshoot the device.

In conclusion, the Cisco Systems CE-100T-8 is a versatile and capable network edge device that combines advanced features, robust security, and scalability. Its high-performance capabilities, coupled with Cisco's reputation for reliability and innovation, make it an ideal choice for enterprises looking to enhance their networking infrastructure.