Dual Link: Receive-Only Topology - Cisco SFE2000P Installation And Configuration Manual

Chapter 3 Information About Topology
Figure 3-3
PWR A PWR B
Subscriber
When configuring the SCE 2000, an optical splitter topology is referred to as "receive-only" connection
mode.
Note that in an optical splitter topology, the SCE 2000 only enables traffic monitoring functionality.
When implementing receive-only topologies with a switch, the switch must support SPAN functionality
Note
that includes separation between ingress and egress traffic and multiple SPAN-ports destinations.

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.
OL-7824-06
Single SCE Platform Single Link: Receive-Only Topology
STATUS BYPASS
LINK RX TX
RX MM TX
GBE-1
SUB LINE
Router
Cisco SCE 2000
LINK RX TX LINK RX TX
RX MM TX RX MM TX
GBE-2
NET SUB LINE/CASCADE NET
Optical
Router
splitter
Cisco SCE 2000 4xGBE Installation and Configuration Guide
Information About Topology Considerations
Series
4xGBE
LINK RX TX
RX MM TX
Network
3-7