6-2
Cisco SCE 2000 4xGBE Installation and Configuration Guide
OL-7824-06
Chapter 6 Cabling the Line Ports and Completing the Installation
Connecting the line ports to the network
–
Single Link: Receive-only Topology
–
Dual Link: Single SCE 2000 Topologies
• Dual SCE 2000 topologies (cascaded)
–
Dual Link: Two SCE 2000s Topology
Note When installing a cascaded system, it is extremely important to follow the sequence of procedures
outlined in the section Step 1To enter the Global Configuration Mode, at the SCE 2000# prompt, type
configure, and press Enter..
Single Link: Inline Topology
In the inline topology, the SCE 2000 resides physically on the GBE (Gigabit Ethernet) link between the
subscribers, which are usually connected through 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, where the SCE 2000 usually connects to a router or layer 3 switch network element.
Figure 6-1 Cabling Diagram for Single Link Inline Topology
In the single link inline topology, either the first GBE link (first two ports) of the SCE 2000 or the second
GBE link (third and fourth ports) can be used, as illustrated in the diagram above. The remaining pair of
ports is unused.
Either port 1 or port 3 is used for connecting to the network element that is deployed on the subscriber
side of the SCE 2000 while port 2 or port 4 is used for connecting to the network element that is deployed
on the network side of the SCE 2000 .
Inline topology requires both Receive and Transmit fibers.
Single Link: Receive-only Topology
In this topology, an optical splitter resides physically on the GBE link that the SCE 2000 should monitor.
The optical splitter is connected to the SCE 2000 via Rx links only.
In this topology, the traffic passes through the optical splitter, which splits traffic to the SCE 2000 .
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.
LINK
RX
Cisco SCE 2000
Series
4xGBE
TX
RX
MM TX
LINK
RX
TX
RX
MM TX
LINK
RX
TX
RX
MM TX
LINK
RX
TX
RX
MM
TX
GBE-1
SUB LINE
NET
PWR B
STATUS
PWR A
BYPASS
GBE-2
SUB
LINE/CASCADE
NET
LINK
RX
Cisco SCE 2000
Series
4xGBE
TX
RX
MM TX
LINK
RX
TX
RX
MM TX
LINK
RX
TX
RX
MM TX
LINK
RX
TX
RX
MM
TX
GBE-1
SUB LINE
NET
PWR B
STATUS
PWR A
BYPASS
GBE-2
SUB
LINE/CASCADE
NET
92786
Subscribers 1
Network 1
OR
Subscribers 2
Network 2
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