Cable the Line Ports

Table Of Contents

Cable the Line Ports

Information About Cabling

Single Link: Inline Topology

Single Link: Receive-only Topology

Cabling the Line Interfaces

Configure GigabitEthernet Auto-Negotiation

Connect the GBE Line Interface Ports

Cable the Line Ports

This module provides instructions for cabling the Gigabit Ethernet ports and for configuring Gigabit Ethernet (GBE) interface parameters.

Note When installing an External Optical Bypass module, the SCE 1000 line ports are connected to the module. See Appendix A in the Cisco SCE 1000 2xGBE Installation and Configuration Guide for complete instructions.

• Information About Cabling

• Cabling the Line Interfaces

Information About Cabling

• Single Link: Inline Topology

• Single Link: Receive-only Topology

Single Link: Inline Topology

In the inline or bump-in-the-wire topology, illustrated in the diagram bellow, 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.

Figure 5-1 Bump-in-the-Wire Installation

Single Link: Receive-only Topology

In this topology, 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 5-2 External Splitting Topology

Cabling the Line Interfaces

• Configure GigabitEthernet Auto-Negotiation

• Connect the GBE Line Interface Ports

Configure GigabitEthernet Auto-Negotiation

By default, the SCE 1000 GBE line interface ports are configured with auto-negotiation disabled.

Note If you change any parameters, you must save the new configuration settings. Type copy running-config startup-config , and press Enter.

Step 1 At the SCE 1000# prompt, type configure and press press Enter.

Enters Global Configuration Mode.

Step 2 At the SCE 1000(config)# prompt, type interface GigabitEthernet 0/ portnumber, and press press Enter.

Enters the GigabitEthernet Interface configuration mode for the specified GBE port.

portnumber is the number of the selected port (1 or 2).

Step 3 At the SCE 1000(config if)# prompt, type auto-negotiate and press press Enter.

Enables auto-negotiation for the GBE interface.

Step 4 At the SCE 1000(config if)# prompt, type exit and press press Enter.

Returns to Global Configuration Mode, from which you can enter the GigabitEthernet Interface configuration mode for the remaining GBE port.

Repeat this procedure to configure auto-negotiation for the other GBE port interface.

Connect the GBE Line Interface Ports

Refer to Information About Cabling to find the appropriate cabling diagram for the topology of your system.

Figure 5-3 Cabling the GBE Interface

The following table presents the fiber specifications. The SCE 1000 may be ordered with either Multimode or Single Mode transceivers The transceiver type is indicated on the front panel under the ports. Note that both transceivers on any individual SCE 1000 are the same, either 850nm Multimode OR 1310 Single Mode.

Table 5-1 Fiber Specifications

SCE Model

Transceiver

Transmit Power

Receive Power

Typical (Max.) Distance

SCE 1000 2xGBE MM

850nm Multimode

-9.5 to -4 dBm

-17 to 0 dBm

•750m for 50�m Core Diameter MMF

•400m for 62.5�m Core Diameter MMF

SCE 1000 2xGBE SM

1310nm FRP laser Single Mode

-9.5 to -3 dBm

-20 to 3 dBm

10 km for 9.0�m Core Diameter SMF

Step 1 Plug the specified fiber optic cable (see table above) into the appropriate GBE port on the front panel of the SCE 1000.

Step 2 Verify that the link LED is green.

If the link LED does not light, try removing the network cable plug and reinserting it firmly into the module socket.

SCE Model	Transceiver	Transmit Power	Receive Power	Typical (Max.) Distance
SCE 1000 2xGBE MM	850nm Multimode	-9.5 to -4 dBm	-17 to 0 dBm	•750m for 50�m Core Diameter MMF •400m for 62.5�m Core Diameter MMF
SCE 1000 2xGBE SM	1310nm FRP laser Single Mode	-9.5 to -3 dBm	-20 to 3 dBm	10 km for 9.0�m Core Diameter SMF