Chapter 3

Topology

Redundancy

An external splitting installation is referred to as receive-onlyconnection mode.

Note that in an external splitting installation, the SCE 1000 has only traffic monitoring capabilities.

Note Receive-only topologies can also be implemented using a switch. Such a switch must support SPAN functionality that includes separation between ingress and egress traffic and multiple SPAN-ports destinations.

Redundancy

When a high degree of reliability is desired, a second SCE 1000 Platform should be installed to provide backup operation capabilities. This redundant SCE 1000 guarantees uninterrupted functioning of all SCE 1000 operations.

Note Redundancy is possible in inline installations only.

A single SCE 1000 platform does not provide redundancy for SCE 1000 control functions. In case of failure of the SCE 1000 unit, the SCE 1000 simply bypasses the traffic; the traffic link is not cut, but no control or monitoring functionality is available.

Two Platforms on Parallel Links in Bump-in-the-Wire Topology

Using two SCE 1000 platforms on parallel links provides redundancy for all SCE 1000 features. In case of failure in the active platform, the backup SCE 1000 unit takes over.

Using redundant SCE 1000 platforms is applicable as an overlay to a customer’s redundant topology, on condition that the entire traffic of a specific subscriber (end station, subnet or VLAN) is flowing through one link only. Both links may be active, providing that the subscriber traffic is mutually exclusive.

This redundancy solution addresses any failure in the SCE 1000 platform itself. It is based on the idea that any fatal hardware or software failure will cause the platform to “cut” the link. A “cut” link will cause the routers/switches on both ends to switch the traffic to the standby link. On the standby link, the traffic is analyzed and policies enforced by the standby SCE 1000, which, after the failure, acts as the active SCE 1000.

Note that when both links are simultaneously independently active and redundant for the other link (as is the case when HSRP with two virtual routers is used), if one link fails, its traffic is directed to the other link. However, the overall supported load in the link that is now carrying all the traffic is only equal to one link, not two.

Cisco SCE 1000 2xGBE Installation and Configuration Guide

 

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Cisco Systems SCE 1000 2xGBE, OL-7821-04 manual Redundancy, Two Platforms on Parallel Links in Bump-in-the-Wire Topology
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SCE 1000 2xGBE, OL-7821-04 specifications

Cisco Systems OL-7821-04, SCE 1000 2xGBE is an advanced network service appliance designed to deliver superior performance and reliability for service providers seeking to optimize their networks. This compact yet powerful device is integral in addressing the growing demands of data traffic in telecommunications and data centers.

One of the standout features of the SCE 1000 is its ability to support both IPv4 and IPv6 networks, ensuring compatibility with current and future networking protocols. This dual-stack capability empowers service providers to seamlessly transition and integrate next-generation applications without jeopardizing service quality.

The SCE 1000 is equipped with two Gigabit Ethernet (GbE) ports that enhance its connectivity options and allow for increased bandwidth. This dual-port configuration supports high-speed data transfers and streamlined operations, making it ideal for enterprises with substantial networking demands. Its flexible interface options facilitate easy integration into existing network architectures without requiring extensive reconfiguration.

An essential characteristic of the SCE 1000 is its advanced service creation technology, which allows for dynamic traffic management. This feature intelligently prioritizes and optimizes applications, ensuring that critical services receive the bandwidth they need while maintaining overall network efficiency. Service providers can leverage this capability to implement Quality of Service (QoS) policies, delivering a consistent user experience even during peak usage times.

Furthermore, the SCE 1000 supports various traffic engineering methods, including deep packet inspection and application recognition, enabling operators to monitor and control network traffic effectively. This capability is particularly crucial in identifying and mitigating potential network threats, resulting in enhanced security measures.

With its robust architecture, the device also offers scalability, accommodating the growing network requirements of service providers. As businesses grow and data use expands, the SCE 1000 can adapt without compromising performance.

In summary, the Cisco Systems OL-7821-04, SCE 1000 2xGBE is a versatile network service appliance that combines high performance, advanced service creation technology, and strong security features. It stands out as an essential tool for service providers aiming to enhance their network capabilities and deliver superior services to customers. Its dual GbE ports, IPv4/IPv6 support, and dynamic traffic management make it a reliable choice for organizations anticipating significant data growth.
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