Incorrect Mode Setting Causes the Extended ECC Communication Failure

When different networks communicate with each other through the interconnected routers, the extended ECC is not available after the extended ECC mode is set to automatic. When the extended ECC mode is set to the specified mode, the fault is rectified.

Product

OptiX OSN 2500, OSN 3500

Fault Type

ECC fault

Symptom

The two networks are connected to each other through Ethernet cables, but they cannot communicate with each other.

Cause Analysis

The possible causes are as follows:

• The IP address is configured incorrectly.
• The extended ECC mode is set incorrectly.

Procedure

1. Query the IP addresses of the two NEs and the IP addresses of the routers connected to the two NEs.
   • NE A:
     IP address: 129.9.1.1
     Subnet mask: 255.255.255.0
     Gateway: 129.9.1.111
   • Router A:
     IP address: 129.9.1.111
     Subnet mask: 255.255.255.0
   • Router B: IP address:
     129.9.0.111
     Subnet mask: 255.255.255.0
   • NE B:
     IP address: 129.9.0.1
     Subnet mask: 255.255.255.0
     Gateway: 129.9.0.111
   The IP addresses are configured correctly, but the extended ECC is still unavailable.
2. Query the ECC extended mode. It is found that ECC Extended Mode is set to Auto mode.
3. Set ECC Extended Mode to Specified mode.
   NOTE:

   Select NE A as the server and NE B as the client. Input the IP addresses and port IDs of NE A and NE B in Set Server and Set Client respectively.
4. After the preceding operations are complete, the extended ECC communication is restored.

Reference Information

• Auto mode: In this mode, the extended ECC connection is established automatically. The configuration of the automatic mode is easy, but extra connections are established. Hence, the resource utilization ratio is low. It is recommended that the automatic mode be used only when there are less than nine NEs. In addition, two NEs can automatically establish an extended ECC for communication only after the ECC extended modes of the two NEs are set to Auto mode.
• Specified mode: In this mode, the extended ECC is established between specified servers and clients. The extended ECC is of high reliability and the bandwidth is effectively used. Generally, the specified mode is adopted to establish the extended ECC connection.

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How to Select Test Meters on Site When Testing OTU Boards of the Data Type

Product

OptiX OSN3500

OptiX OSN7500

Fault Type

Optical Transponder Board

Tester

Symptom

The OTU boards of the data type used in a project are the SSC6LOG01M01, SSC6LDGD01M12, SSC8LBE01M01, and SSC6FCETD04. The meters available on site are as follows:

• SmartBits Main Chassis model SMB600B
• SmartBits Main Chassis model SMB600 (with option SWF1201A, SWF1212A)
• SmartBits Main Chassis model SMB600 (with option SWF1201A)
• SmartMetrics 10 Gbps Ethernet XFP, 1 Port MSA Module model XFP3730A
• 10/100/1000 Mbps and Gigabit Ethernet Fiber, 2-port, SmartMetrics XD Module model LAN3320A
• 10/100/1000 Mbps and Gigabit Ethernet Fiber, 2-port, TeraMetrics XD Module model LAN3321A
• 10/100/1000 Mbps and Gigabit Ethernet Fiber, 4-port, SmartMetrics XD Module model LAN3324A
• SmartMetrics Gigabit Ethernet Module model LAN3201B
• SMART Optical Level Attenuator, 1260 nm to 1650 nm model OLA-55 (2280/01)

On site, which one or two test meters should be selected to test all the OTU boards of the data type?

Cause Analysis

According to the types of OTU boards used on site, services that need to be configured and activated in the project include GE, 10GE, and FC100/200. The meter SmartBits Main Chassis model SMB600B can be used to test these three types of services. The test card varies with the service type.

All the services in the project can be tested with the meter SmartBits Main Chassis model SMB600B.

• In the case of the GE service, use the test card LAN3320A.
  • 1x SmartBits Main Chassis model SMB600B
  • 1x 10/100/1000Mbps and Gigabit Ethernet Fiber, 2-port, SmartMetrics XD Module model LAN3320A
• In the case of the 10GE service, use the test card XFP-3730A.
  • 1x SmartBits Main Chassis model SMB600B
  • 1x SmartMetrics 10 Gbps Ethernet XFP, 1 Port MSA Module model XFP3730A
• In the case of the FC100/200 service, use the test card FBC3602.
  • 1x SmartBits Main Chassis model SMB600B
  • 1x FBC3602

Procedure

1. None.

Reference Information

None.

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The Cross-Connection Function of the Subrack Fails

The cross-connection function between two LOG or ELOGS boards on the left and right sides of the subrack fails because the hardware bus is restricted.

Product

OptiX OSN3500,OSN7500,MSTP

Fault Type

Optical Transponder Unit

Subrack

Symptom

The cross-connection function between two LOG boards on the left and right sides of the subrack fails. Relevant documentation, however, shows that the LOG board supports the function.

Cause Analysis

The hardware bus is restricted. The backplane of the OptiX Metro 6100 V100R006 subrack consists of two parts, that is, slots IU1-IU6 and slots IU8-IU13. The two LOG or ELOGS boards can be configured with the inter-board GE service cross-connection and the WXCP protection if the two boards are both installed in slots IU1 and IU3 or IU8 and IU10.

The ELOG or ELOGS board supports the inter-board GE service cross-connection across cross-connect planes.

• The combination of two ELOG or ELOGS boards in the same cross-connect plane (in slots IU1-IU6 or slots IU8-IU13) supports the cross-connection of a maximum of eight pairs of GE services.
• The combination of two ELOG or ELOGS boards in two paired slots (IU1 and IU8, IU2 and IU9, IU3 and IU10, IU4 and IU11, IU5 and IU12, or IU6 and IU13) also supports the cross-connection of a maximum of eight pairs of GE services.

Procedure

1. None.

Reference Information

None.

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