Cisco Systems CE-100T-8 specifications Ethernet Link Integrity Support, 16-3

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Chapter 16 CE-100T-8 Ethernet Operation

CE-100T-8 Ethernet Features

The CE-100T-8 card has symmetric flow control and proposes symmetric flow control when autonegotiating flow control with attached Ethernet devices. Symmetric flow control allows the CE-100T-8 cards to respond to pause frames sent from external devices and to send pause frames to external devices.

The pause frame instructs the source to stop sending packets for a specific period of time. The sending station waits the requested amount of time before sending more data. Figure 16-2illustrates pause frames being sent and received by CE-100T-8 cards and attached switches.

Figure 16-2 Flow Control

 

 

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This flow-control mechanism matches the sending and receiving device throughput to that of the bandwidth of the STS circuit. For example, a router might transmit to the Ethernet port on the CE-100T-8 card. This particular data rate might occasionally exceed 51.84 Mbps, but the SONET circuit assigned to the CE-100T-8 port might be only STS-1 (51.84 Mbps). In this example, the CE-100T-8 sends out a pause frame and requests that the router delay its transmission for a certain period of time. With flow control and a substantial per-port buffering capability, a private line service provisioned at less than full line rate capacity (STS-1) is efficient because frame loss can be controlled to a large extent.

Ethernet Link Integrity Support

The CE-100T-8 supports end-to-end Ethernet link integrity (Figure 16-3). This capability is integral to providing an Ethernet private line service and correct operation of Layer 2 and Layer 3 protocols on the attached Ethernet devices.

End-to-end Ethernet link integrity means that if any part of the end-to-end path fails, the entire path fails. It disables the Ethernet port on the CE-100T-8 card if the remote Ethernet port is unable to transmit over the SONET network or if the remote Ethernet port is disabled.

Failure of the entire path is ensured by turning off the transmit pair at each end of the path. The attached Ethernet devices recognize the disabled transmit pair as a loss of carrier and consequently an inactive link or link fail.

Figure 16-3 End-to-End Ethernet Link Integrity Support

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

 

June 2005

16-3

 

 

 

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Contents 16-1 CE-100T-8 OverviewCE-100T-8 Ethernet Features Autonegotiation, Flow Control, and Frame Buffering16-2 16-3 Ethernet Link Integrity Support16-4 Ieee 802.1Q CoS and IP ToS Queuing16-5 Rmon and Snmp Support16-6 CE-100T-8 Sonet Circuits and FeaturesStatistics and Counters Available Circuit Sizes and Combinations16-7 Maximum Number of STS-1-2v Circuits16-8 CE-100T-8 STS/VT Allocation TabCE-100T-8 Vcat Characteristics CE-100T-8 POS Encapsulation, Framing, and CRC16-9 16-10 CE-100T-8 Loopback, J1 Path Trace, and Sonet Alarms

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.