Cisco SCE 2000 4/8xFE Quick Start Manual page 43

Inline topologies can both Receive and Transmit to the SCE 2000. Cascade ports always require both Receive and
Transmit to be connected.
The following diagram illustrates the connections for a dual link, two SCE 2000 inline topology
For inline topologies, the SCE 2000 is directly connected to the two FE links, using the FE-1 ports on the two SCE
2000s, while the FE-2 ports on both units are used as the cascade ports, as described above.
For receive-only topologies, the SCE 2000 is connected to the external switch, which should be configured with four port
replication configurations, one for upstream and one for downstream traffic for each FE link. (Alternatively, two external
switchs may be used, one for each link, with each configured with two-port replication configurations.) The replicated
ports should then be connected to the SCE 2000s using the FE-1 ports as described above. The FE-2 ports on each SCE
2000 are used as the cascade ports.
When implementing receive-only topologies with a switch, the switch must support SPAN functionality that includes
Note
separation between ingress and egress traffic and multiple SPAN-ports destinations.
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