Chapter 3

Topology

Topology-Related Parameters

Redundancy

Redundancy requires two platforms on parallel links, one active and one standby, in inline topology. When the active SCE 1000 platform detects a failure situation, it will immediately switch to Cutoff mode, causing the routers/switches on both ends to switch the traffic to the standby link and thus activate the standby SCE 1000 platform.

There are two options when the failed SCE 1000 platform is finished reloading:

•It may either actually resume operation in the defined operational bypass mode, returning to its status as the active SCE 1000 platform.

•It may remain inactive in the failure bypass mode.

Maintaining the Network Links vs Maintaining SCE 1000 Platform Functionality

When a single SCE 1000 is deployed, the user may decide that in case of a failure, maintaining the network link is more important than providing the SCE 1000 functionality. In this scenario, when the SCE 1000 detects a failure that requires a reboot process for recovering, it immediately switches to Bypass mode, allowing all traffic to bypass the SCE 1000. The SCE 1000 stays in Bypass mode maintaining the network link, albeit without SCE 1000 processing, until the SCE 1000 fully recovers from the failure and is ready to resume normal functioning.

Alternatively, the user may decide that the SCE 1000 functionality is sufficiently crucial to require severing the link if the SCE 1000 platform fails. In this case, when the SCE 1000 detects a failure that requires a reboot process for recovering, it immediately switches to Cutoff mode, stopping all traffic flow. The SCE 1000 stays in Cutoff mode, halting all traffic, until it fully recovers from the failure and is ready to resume normal functioning. In Cutoff the physical interface is blocked, enabling the network device connected to the SCE 1000 to sense that the link is down.

Topology-Related Parameters

Refer to the following sections to determine the correct values for all topology-related parameters before beginning run the initial setup of the SCE 1000.

Connection Mode Parameter

The connection mode parameter refers directly to the physical topology in which the SCE 1000 is installed. Installation is possible in either of the two following modes:

•Inline — The SCE 1000 resides on the data link between the subscriber side and the network side, thus both receiving and transmitting packets.

•Receive-only— The SCE 1000 does not reside physically on the data link. Data is forwarded to the SCE 1000 via an external optical splitter. The SCE 1000 itself receives only and does not transmit.

Note Default value = Inline

Cisco SCE 1000 2xGBE Installation and Configuration Guide

 

OL-7821-04

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Cisco Systems SCE 1000 2xGBE, OL-7821-04 manual Topology-Related Parameters, Redundancy, Connection Mode Parameter
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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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