Single Link: Receive-Only Topology; Dual Link: Receive-Only Topology - Cisco SCE8000 Installation And Configuration Manual

Chapter 3 Cisco SCE8000 Topology and Topology-Related Parameters

Single Link: Receive-only Topology

In this topology, an optical splitter resides physically on the 10GBE link between the subscribers and the
network. The traffic passes through the optical splitter, which splits traffic to the Cisco SCE8000. The
Cisco SCE8000, therefore, only receives traffic and does not transmit.
Figure 3-4
Subscriber
When configuring the Cisco SCE8000, an optical splitter topology is referred to as "receive-only"
connection mode.
Note In an optical splitter topology, the Cisco SCE8000 only enables traffic monitoring functionality.
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.

Dual Link: Receive-Only Topology

In this topology, one Cisco SCE8000 is connected in receive-only mode to two full duplex, 10 Gig 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 Cisco SCE8000 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.
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Single Link: Receive-only Topology
Splitter
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Cisco SCE8000 Installation and Configuration Guide, Rel 3.1.7
Network
Physical Topologies
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