Cisco Systems SCE 2000 4/8xFE manual Two Cascaded SCE 2000s For Dual Links

Chapter 3 Topology

Physical Topologies

Dual Link: Receive-Only Topology

In this topology, one SCE 2000 is connected in receive-only mode to two full duplex, FE links using external switchs. If the two links are load-shared, asymmetrical routing might occur, and some of the flows may be split, i.e. the upstream packets of the flow go on one link, and the downstream packets go on the other link.

When installed in this topology, the SCE 2000 completely overcomes this phenomenon, and provides its normal monitoring functionality as if asymmetrical routing were not occurring in the two links.

This installation supports monitoring functionality only, and is configured as “receive-only” connection mode.

Figure 3-4: Single SCE Platform Dual Link Receive-Only Topology

No When implementing receive-only topologies with a switch, the switch must support SPAN functionality te that includes separation between ingress and egress traffic and multiple SPAN-ports destinations.

Two Cascaded SCE 2000s For Dual Links

In this topology, two cascaded SCE 2000s are used. This allows a fail-over solution, where in case of a failure of one SCE 2000, the functionality that the SCE 2000 provides is preserved by the redundant platform.

Cisco SCE 2000 4/8xFE Installation and Configuration Guide

OL-7826-05 3-7