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OSN3500 EFS0 single boards are available in several functional versions. The single boards are available in four functional versions, N1, N2, N4 and N5, and the N1EFS0, N2EFS0 and N4EFS0 single boards have been discontinued. You can select the required functional single board according to the actual situation. The single boards are Ethernet switching processing boards, which are mainly used to solve the telecom application areas such as Ethernet service access, bandwidth management, and Layer 2 switching for Ethernet services. The single board supports functions and features such as Layer 2 switching, MPLS, multicast, and so on. The single board consists of an Ethernet access module, a network processing module, a mapping module, an interface conversion module, a logic control module, a clock module, and a power module.
OSN3500 SSN5EFS0 Single Board Version Description
| Item | Description |
|---|---|
| Functional Versions |
The EFS0 single board has four functional versions, N1, N2, N4, and N5. |
| Differences |
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| Substitutability |
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Usage Problem Description
Processing
1. First, check the service configuration on the transmission side, and find that it is configured as an EPLAN service, which requires that the BPDU messages of the transmission equipment and the data equipment can be compatible. When RSTP is turned on on the transmission side, the service ping passes, but the BPDU cannot be transmitted, and when RSTP is turned off, the service cannot ping pass. It means that after opening the Spanning Tree Protocol, the business signal can communicate normally, and the transmission equipment itself is configured normally.
2, after confirming with the data, the MSTP multiple spanning tree protocol opened between S3328 and S2300 is not supported by Huawei transmission equipment, and can only support RSTP single spanning tree protocol. The best way is to dock the Spanning Tree Protocol between S3328 and S2300, and transmit for transmissions.
3, guide the user to configure the EPL service as a shared port to realize the convergence function, the EPL service BPDU message as a data service signal to transparently transmit, do not recognize and do not handle. After the modification, the fault remains the same, the under-hanging data devices can ping each other, but the BPDU message can not be transmitted.
4, suspect that the BPDU is ultra-short packet is discarded, use sniffer to capture packets, found that the BPDU is about 100 bytes, to rule out the problem of ultra-short packets.
5, and data engineers to confirm that the BPDU is a message without VLAN, that is, the data side of the signal sent over with VLAN business data also have BPDU messages without VLAN, guide the user to modify the port attributes for hybrid, the data side to see the BPDU message send and receive normal, the problem is solved.
Root Cause
1. The byte of the BPDU message is less than 64 bytes, which causes the ultra-short packet to be discarded.
3. Transmission side data configuration error.
4. Compatibility problem of Spanning Tree Protocol between transmission side and data side.
Recommendations and Summary
2. There are BPDU messages with VLANs and without VLANs, so you need to check them clearly when you configure the service on the transmission side and configure them according to the situation. In this example, the service signal is with VLAN and the BPDU is without VLAN, so you need to configure the port attribute as hybrid attribute. When the BPDU with VLAN is transmitting, the BPDU is treated as a service signal, and the corresponding VLAN should be added to configure the service.
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!
