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The main difference between OSN3500 Extended ECC and ECC is that the ECC physical layer travels the DCC channel, while the Extended ECC physical layer travels the extended channel (e.g., Ethernet channel). As shown in Figure 1, subnet 1 and subnet 2 are two different networks with no fiber between them, and the two networks are linked through HUB to achieve the purpose of managing the network elements of subnet 2 through the GNE of subnet 1.
The realization principle of the automatic way to extend ECC is as follows:
- Each network element obtains the IP address of other network elements in the same Ethernet according to the ARP (Address Resolution Protocol) protocol.
- The network element with the largest IP address automatically acts as a server and listens for TCP requests from the client.
- The other network elements automatically act as clients and send TCP connection requests to the server.
- The server receives the client's TCP connection request and establishes the corresponding TCP connection.
- The network element uses the TCP connection to act as a MAC connection to realize ECC communication.
The implementation principle of the specified method of extending ECC is basically the same as that of the automatic method, except that the server, client, and connection port number are manually specified.
When different OSN3500 networks communicate with each other through the router, the extended ECC does not work when the mode of extended ECC is set to automatic mode. After setting it to the specified mode, the fault is eliminated.
OptiX OSN 2500
Fault Category
ECC Failure
Phenomenon Description
Two networks are connected via Ethernet cables and cannot communicate with the opposite network.
Cause Analysis
The possible causes are as follows:
- The IP address is set incorrectly.
- Extended ECC mode setting error.
Procedure
- Query the IP addresses of the two network elements and the routers connected to them.
- Network element 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
- Network element B:
IP address: 129.9.0.1
Subnet mask: 255.255.255.0
Gateway: 129.9.0.111
The IP address is set correctly, but the extended ECC is still not working.
- Network element A:
- Check the setting of "ECC Extension Mode" to "Auto Mode".
- Reset the "ECC Extension Mode" to "Specified Mode". Configure the "ECC Extension Mode" to "Specified Mode":
Select network element A as the server and network element B as the client. Enter the IP address and port of Network Element A and Network Element B in "Server Settings" and "Client Settings" respectively.
- After these operations, the extended ECC resumes communication.
Reference Information
- Auto mode: automatically establishes extended ECC connections. This mode is convenient, but it establishes additional connections, which is not a good resource utilization, and is recommended only when there are fewer than 9 network elements. Both network elements establishing extended ECC must be set to auto mode to automatically establish extended ECC.
- Specified Mode: Establish extended ECC by specifying the server and client, with high connection reliability and high bandwidth utilization, this mode is generally used to establish extended ECC connections.
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to call!
