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Cisco SCE8000 10GBE Installation and Configuration Guide, Release 3.6.x
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About this Guide
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Cisco Service Control Overview
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Introduction to the Cisco SCE8000 Platform
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Cisco SCE8000 Topology and Topology-Related Parameters
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Installing the Cisco SCE8000 Chassis
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Connecting the Management Interfaces
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Cabling the Line Ports and Completing the Installation
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Basic Cisco SCE8000 Platform Operations
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Troubleshooting
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Removal and Replacement Procedures
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Using Optical Splitters with 10GBE Links
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CLI Commands to Verify a Successful Installation
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Feedback
Table Of Contents
Cabling the Line Ports and Completing the Installation
Connecting the Line Ports to the Network
Single Link: Receive-only Topology
Dual Link: Single Cisco SCE8000 Topologies
Dual Link: Two Cisco SCE8000s Topology
Multi-Gigabit Service Control Platforms (MGSCP) Topologies
Optical Bypass Module Connectivity
Cabling the 10GBE Line Interface Ports
XFP Module Cabling and Connection Equipment
How to Cable the 10GBE Line Interface Ports
Cabling the 10GBE Line Interface Ports: Using the External Optical Bypass Module
Testing Connectivity: Examining Link LEDs and Counters
How to View the Ten Gigabit Ethernet Port Status
How to View the Ten Gigabit Ethernet Counters
How to View the User Log Counters
How to Install a Service Control Application
How to Install a Cascaded System
CLI Commands for Cascaded Systems
Topology-Related Parameters for Redundant Topologies
How to Configure the Connection Mode
Cabling the Line Ports and Completing the Installation
Revised: November 8, 2010, OL-21054-04Introduction
This chapter provides instructions for cabling the Cisco SCE8000 10 Gigabit Ethernet ports for single, cascaded, and MGSCP topologies. In a cascade topology, this includes the cascade ports as well as the line ports.
The 10 Gigabit Ethernet ports are located on the 10G SPA modules, which are installed in the SCE8000-SIP module in slot 3 of the Cisco SCE8000 chassis.
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When installing a cascaded system, it is extremely important to follow the sequence of procedures outlined in the "Cascaded Systems" section on page 6-15.
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Connecting the Line Ports to the Network
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Single Link: Inline Topology
In the inline topology, the Cisco SCE8000 resides physically on the 10 GBE (Ten Gigabit Ethernet) link between the subscribers and the network. The subscribers 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). The network is a router or Layer 3 switch network element connecting the Cisco SCE8000 toward the core of the network.
Guidelines for single link inline topologies:
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Single link inline connectivity
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Single Link: Receive-only Topology
In this topology, an optical splitter unit resides physically on the 10 GBE link that the Cisco SCE8000 should monitor. The optical splitter unit is connected to the Cisco SCE8000 Rx links only. For each link monitored, there are two Rx connections to the Cisco SCE8000, one for each direction of traffic flow in the link. The traffic passes through the optical splitter, which allows the Cisco SCE8000 to monitor traffic without affecting the normal optic and data path between subscriber and network.
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Guidelines for single link receive-only topologies:
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Single link receive-only connectivity:
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Dual Link: Single Cisco SCE8000 Topologies
In this topology, one Cisco SCE8000 is connected to two full duplex, 10GBE links. The Cisco SCE8000 may be either inline, to support both monitoring and traffic control functionality, or receive-only for traffic monitoring functionality only.
Guidelines for dual link topologies:
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Dual link connectivity:
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Dual Link: Two Cisco SCE8000s Topology
In this topology, two Cisco SCE8000s are connected to two full duplex, 10 GBE links, providing full redundancy through cascading the two Cisco SCE8000s. The Cisco SCE8000s must be inline.
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When two Cisco SCE8000s are used, the ports 3/0/0 and 3/1/0 in each Cisco SCE8000 are connected to the links, whereas ports 3/2/0 and 3/3/0 are the cascade ports that are used for communicating between the two Cisco SCE8000s as follows:
Cisco SCE8000 #1
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Cisco SCE8000 #2
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Inline topologies require connecting both Receive and Transmit fibers to the Cisco SCE8000. Cascade ports always require both Receive and Transmit fibers to be connected.
To maintain link continuity at all times, it is recommended to install two optical bypass modules, and the traffic ports should be connected to these bypass modules.
Multi-Gigabit Service Control Platforms (MGSCP) Topologies
In this topology, multiple Cisco SCE 8000 platforms are connected to a Cisco 7600 Series router used as a load-balancer ("dispatcher") between the platforms. Traffic enters the router, is distributed between the Cisco SCE8000 platforms by the router EtherChannel, and returns to the router to be forwarded to its original destination.
General guidelines for MGSCP topologies:
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Therefore, for N+1 redundancy, one router and five Cisco SCE8000 platforms are used to support eight links.
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When cabling to the EC, follow these guidelines:
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MGSCP Connectivity Examples
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The First Step-Ordering the EC Ports
This section explains how to order the EC ports and assign them to links. This example is the basis for all following examples.
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Single Router MGSCP Connectivity
Four links require two Cisco SCE8000 platforms. Connect the ordered pairs, each pair of EC ports to a pair of Subscriber/Network ports in a Cisco SCE8000 platform:
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The actual connections might look like this:
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Single Router with N+1 Redundancy MGSCP Connectivity
To achieve N+1 redundancy, add one extra SCE platform as the standby platform. Also, add two more ports on each EC to be used as standby ports. In this case, use three SCE platforms, two on the traffic links and one for redundancy, which would be connected to the standby ports.
If you add ports 0/3 and 2/3 on EC1 and 2/4 and 4/4 on EC2, the ECs would look like this:
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The standby ports must be the two highest-numbered ports:
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The traffic ports would be assigned to the links as follows:
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The standby ports would be assigned to the links as follows:
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If Cisco SCE8000 #3 is the redundant platform, Links 5 and 6 would be connected to it and the actual connections might look like this:
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Dual Routers MGSCP Connectivity
Four links on each router would require four Cisco SCE8000 platforms. For the sake of simplicity, we assume that the EC ports are the same on both routers.
Connect the ordered pairs, each pair of EC ports to a pair of Subscriber/Network ports in a Cisco SCE8000 platform:
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The actual connections might look like this:
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Dual Routers with N+1 Redundancy MGSCP Connectivity
To achieve N+1 redundancy, add one extra SCE platform as the standby platform. Also, add another port on each EC to be used as standby ports. In this case, use five SCE platforms, four on the traffic links and one for redundancy, which would be connected to the standby ports.
Again, for the sake of simplicity, assume that the EC ports are the same on both routers.
If you add ports 0/3 on EC1 and 2/4 on EC2, the ECs would look like this:
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The standby ports must be the highest-numbered ports:
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The traffic ports would be assigned to the links as follows:
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The standby ports would be assigned to the links as follows:
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If Cisco SCE8000 #5 is the redundant platform, Link 5 from both routers is connected to it and the actual connections might look like this:
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The Optical Bypass Module
The external optical bypass module is an optional component that provides additional protection by enabling automatic preservation of the network 10GBE link. For more information about the external bypass module, see "The Cisco SCE8000 Optical Bypass" section on page 2-8.
There are two installation options for the optical bypass module:
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Statement 1056Optical Bypass Module Connectivity
Single Link Topology
A single link requires only one bypass module.
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Dual Link Topology
A dual link requires two bypass modules.
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Cabling the 10GBE Line Interface Ports
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XFP Module Cabling and Connection Equipment
Table 6-1 and Table 6-2 provide cabling specifications for the XFP modules that can be installed on the 10 Gigabit Ethernet SPA. All XFP ports have LC-type connectors.
Table 6-2 XFP Transceiver Optical Transmit and Receive Specifications
XFP-10GLR-OC192SR
10GBASE-LR, 1310-nm SMF
(10.3125-Gbps line rate)-8.2
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-14.4
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1260 to 1355
1260 to 1565
XFP-10GER-OC192IR
10GBASE-ER, 1550-nm SMF
(10.3125-Gbps line rate)-4.7
+4.0
-15.8
-1.0
1530 to 1565
1260 to 1565
XFP-10GZR-OC192IR
10GBASE-ZR, 1550-nm SMF
(10.3125-Gbps line rate)0
+4.0
-24
-7
1530 to 1565
1260 to 1565
XFP-10G-MM-SR
10GBASE-SR, 850-nm MMF
(10.3125-Gbps line rate)-1.0
-3.8 OMA1-1.0
-11.1 OMA840 to 860
840 to 860
1 At 840nm and a spectral width of 0.29nm
Optical Device Maintenance
Any contamination of the fiber connection can cause failure of the component or failure of the whole system. A particle that partially or completely blocks the core generates strong back reflections, which can cause instability in the laser system. Inspection, cleaning, and reinspection are critical steps to take before making fiber-optic connections.
How to Cable the 10GBE Line Interface Ports
Step 1
Make sure to push on the connector until you hear a click, which indicates that the connector is fully inserted and secured in the receptacle. Always make sure that you insert the connector completely into the socket.
Figure 6-1 Cabling the 10GBE Interface
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If the link LED does not light, try removing the network cable plug and reinserting it firmly into the module socket.
Cabling the 10GBE Line Interface Ports: Using the External Optical Bypass Module
See Optical Bypass Module Connectivity for specific connectivity (Figure 6-2).
Figure 6-2 External Optical Bypass Module Line Interfaces
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Cisco SCE8000 chassis.Step 3
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By its nature, the optic bypass module does not connect the link to the SCE8000-SIP module until the entire Cisco SCE8000 system is fully functional. It is necessary to bring the Cisco SCE8000 to fully operational and non-bypassed status to confirm correct functioning of the link through the optic bypass module to the SCE8000-SIP module.
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Figure 6-3 Cabling the CTLR Interface on the External Bypass Module
Figure 6-4 Cabling the SCE8000-SCM-E Module
Testing Connectivity: Examining Link LEDs and Counters
If the Cisco SCE8000 platform has been powered up, verify that connectivity has been established on all links. If the Cisco SCE8000 platform is not powered up, perform this step after starting the Cisco SCE8000 platform.
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Examining the LEDs
The 10 GBE Link LED should be green, verifying that an active connection exists.
How to View the Ten Gigabit Ethernet Port Status
Step 1
This displays the port link status.
The following example displays a system response:
SCE# show interface TenGigabitEthernet 3/1/0 Actual Status: Link is on Bandwidth: 10000000Kbps Burst-size: 500000bytesHow to View the Ten Gigabit Ethernet Counters
In an inline topology, you can monitor traffic via the platform counters for both the Rx and Tx connections. The counters increase as packets flow through the Cisco SCE8000 for both Rx and Tx.
However, in receive-only topologies, the counters for the Tx do not increment, as the Cisco SCE8000 is only monitoring traffic, and not re-transmitting it.
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This displays the TenGigabitEthernet counters. This command enables you to verify that traffic is taking place. The counters increase together with real-time packet flow through the Cisco SCE8000.
Remember, in bump-in-the-wire topology, both the Rx and Tx counters apply as traffic monitors. For receive-only topologies, using an external splitter, only the Rx counters apply.
The following example shows the counters of the first Ten Gigabit Ethernet interface:
SCE> show interface TenGigabitEthernet 3/0/0 counters In total octets: 100 In good unicast packets: 90 In good multicast packets: 0 In good broadcast packets: 10 In packets discarded: 0 In packets with CRC/Alignment error: 0 In undersized packets: 0 In oversized packets: 0 Out total octets: 93*2^32+1022342538 Out unicast packets: 858086051 Out non unicast packets: 0 Out packets discarded: 0How to View the User Log Counters
You should view the user log for errors that occurred during the installation process.
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SCE# show logger device user-file-log counters Logger device User-File-Log counters: Total info messages: 1 Total warning messages: 0 Total error messages: 0 Total fatal messages: 0If there are "Total error messages" or "Total fatal messages", use the show logger device User-File-Log command to display details about the errors.
How to Install a Service Control Application
The Service Control solution requires that the Service Control application be installed on the SCE platform. This is a pqi file that is installed and configured using the Cisco Service Control Application for Broadband (SCA BB) console.
For an explanation of how to install the pqi file, see Installing the Application and Protocol Pack on the SCE Platform in Cisco Service Control Product Installation Guide.
For information on initial configuration of the application, see Initial SCA BB Configuration in Cisco Service Control Product Installation Guide.
For complete instructions on how to install and configure the SCA BB application, see the Cisco Service Control Application for Broadband User Guide.
Cascaded Systems
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How to Install a Cascaded System
This section outlines the installation procedures for a redundant solution with two cascaded
Cisco SCE8000 platforms. See Cisco SCE8000 CLI Command Reference for details of the CLI commands.When working with two Cisco SCE8000 platforms with split-flow and redundancy, it is extremely important to follow this installation procedure.
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To maintain link continuity at all times, including during the reload sequence and power failure events, it is recommended to install optical bypass modules.
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The cascade ports must be either be connected directly in Layer 1 (dark fibers), or using the following procedure to connect through a switch.
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Use the show interface linecard 0 connection-mode command.
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Use the show interface linecard 0 link mode command.
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CLI Commands for Cascaded Systems
This section presents CLI commands relevant to the configuration and monitoring of a redundant system.
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Topology-Related Parameters for Redundant Topologies
All four of the topology-related parameters are required when configuring a redundant topology.
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The sce-id parameter, which identifies the SCE platform, replaces the physically-connected-link parameter, which identified the link. This change was required with the introduction of the
Cisco SCE8000 GBE platform, which supports multiple links.In the Cisco SCE8000 10GBE, the number assigned to the sce-id parameter (0 or 1) is defined as the of number of the physically connected link.
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If either the bypass or external-bypass option is configured, the optical bypass module must be properly installed. If an optical bypass device is not detected, the command is executed but a warning is issued. The system then enters warning mode until either the command is changed, or the presence of an optical bypass device is detected.
How to Configure the Connection Mode
Use the following command to configure the connection mode, including the following parameters:
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EXAMPLE 1
Use the following command to configure the primary SCE platform in a two-SCE platform inline topology. Link 1 is connected to this SCE platform. If a failure occurs, the behavior of the SCE platform is bypass.
SCE(config if)# connection-mode inline-cascade physically-connected-links link-1 priority primary on-failure bypassEXAMPLE 2
Use the following command to configure the SCE platform that might be cascaded with the SCE platform in Example 1. This SCE platform would be the secondary SCE platform. Because Link 1 was connected to the primary, Link 0 would be connected to this SCE platform. The connection mode would be the same as the first. If a failure occurs, the behavior of the SCE platform is also bypass.
SCE(config if)# connection-mode inline-cascade physically-connected-links link-0 priority secondary on-failure bypassHow to Set the Link Mode
The SCE platform has an internal hardware card used to maintain the links even when the SCE platform fails. This hardware card has three possible modes of operation:
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Normally, the link mode is selected by the SCE platform software according to the configured connection-mode. However, the link mode command can be used to enforce a specific desired mode. This may be useful when debugging the network, or in cases where we would like the SCE platform just to forward the traffic. (This is only relevant to inline topologies even though the configuration is available also when in receive-only mode.)
The following link mode options are available:
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This does not affect the redundancy states.
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From the SCE(config if)# prompt, enter link mode [forwarding|bypass|cutoff] and press Enter.
Monitoring a Cascaded System
Use the following commands to monitor a cascaded system. They provide information about the connection status and link configuration.
How to View the Current Connection Mode
From the SCE> prompt, enter show interface linecard 0 connection-mode and press Enter.
How to View the SCE-ID
From the SCE> prompt, enter show interface linecard 0 sce-id and press Enter.
How to View the Current Link Mode
From the SCE> prompt, enter show interface linecard 0 link mode and press Enter.
How to View the Current Redundancy Status of the SCE Platform
From the SCE> prompt, enter show interface linecard 0 cascade redundancy-status and press Enter.
How to View Information about the Peer SCE Platform
From the SCE> prompt, enter show interface linecard 0 cascade peer-sce-information and pressEnter.
How to View Information about the Cascade Connections
From the SCE> prompt, enter show interface linecard 0 cascade connection-status and press Enter.
How to View the Current Link Mappings
From the SCE> prompt, enter show interface linecard 0 physically-connected-links and press Enter.
