Two Cascaded Sce 2000S For Dual Links - Cisco CE 2000 Platform SCE 2000 4xGBE Installation And Configuration Manual

Physical Topologies
Dual Link: Receive-Only Topology
In this topology, one SCE 2000 is connected in receive-only mode to two full duplex, GBE links
using optical splitters. 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
Note When implementing receive-only topologies with a switch, the switch must support SPAN functionality
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.
SCE 2000 4xGBE Installation and Configuration Guide
3-6
Chapter 3 Topology
OL-7824-02