Single Link: Receive-Only Topology; Figure - Cisco SCE 1000 Installation And Configuration Manual

Chapter 6 Cabling the Line Ports and Completing the Installation
Cabling Diagrams
In the inline or bump-in-the-wire topology, illustrated in the diagram above, the SCE 1000 resides
physically on the data link between the subscriber side, usually either a BRAS (in DSL access), a PDSN
(in wireless access), a CMTS (in the Cable access), or a switch or router aggregator (in other topologies),
and the network side, usually a router or layer 3 switch network element. This is the inline topology,
providing both traffic monitoring and control capabilities.
In this topology, all the traffic of the SCE 1000 is deployed as a transparent layer2 overlay on the
customer's existing network.

Single Link: Receive-only Topology

In this topology

(Figure

6-2), an external optical splitter resides physically on the GBE link between the
subscriber side and the network side. The external splitter is connected to the SCE 1000 via Rx links
only.
In this topology, the traffic passes through the external splitter, which splits traffic to the SCE 1000. The
SCE 1000, therefore, is in receive-only topology, having 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.
Figure 6-2 Single Link: Receive-only Topology
Cisco SCE 1000
Series
2xGBE
PWR A PWR B STATUS BYPASS
LINK RX TX LINK RX TX
RX MM TX RX MM TX
GBE-1
SUB LINE NET
Network
Optical
Router Router
Subscriber
splitter
Cisco SCE 1000 2xGBE Installation and Configuration Guide
6-3
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