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.

How to do when Failing to Connect the 155 Mbit/s Optical Port on the Router of Company C

How to do when Anomalies Occur After Main Subrack Becomes Extended Subrack?

When Interruption of Existing Services on Some Data Boards of OSN Products