Huawei routers often encounter faults when setting Wan

When a Huawei router sets a wide area network, the so-called Wide Area Network (WAN) is also called a remote network. Generally, the wide area network has a large physical connection range, ranging from dozens of kilometers to thousands of kilometers, it can connect multiple cities or countries, or span several continents and provide remote communication. Wan technology is mainly located at the bottom three layers: physical layer, data link layer, and network layer.

If the CRC Check bits at both ends are different, the link layer status of the interface may be Down. Especially when connected to devices of other manufacturers, the default configurations on both ends may be different and must be configured to be consistent between the two ends. Www.2cto.com 1. If different POS can be added to the same IP address-Trunk, the answer is yes. However, we do not recommend that you bind interfaces with different forwarding capabilities to the same IP address-Trunk, at this time, the forwarding capability of each interface can only reach the level of the interface with the lowest capability. 2. Switching of transmission devices will affect the POS interface. When the POS interface is interconnected with the peer end through the transmission device, if the transmission device performs switching between the active and standby ends, the POS interface may be transient disconnected and an SDH alarm is triggered. If the active link is interrupted, the active link signal becomes invalid, and the POS interface detects that the transient channel signal becomes invalid, the physical status of the interface is set to Down, and the corresponding SDH alarm is reported. The transmission device initiates a switchover Based on the detected signal failure. After the switchover is completed, the service is forwarded to the standby link, the signal returns to normal. The POS interface also detects normal signals and restores the physical status of the interface to Up.
Iii. Communication between MP-Group in short sequence mode and MP-Group in long sequence mode. When one end is configured as short sequence mode and the other end is not configured, both ends will negotiate, the negotiation result is a long sequence. The sequence characters in the packet header are used to represent the sequence of the multipart packets. Www.2cto.com 4. When the HDLC protocol is used for interconnection, the ping packet between the two ends of the MTU is sent. The HDLC protocol does not negotiate the MTU value between the two ends of the interface, and the packet larger than the smaller MTU value cannot pass, however, by default, the ping packets sent from the Huawei router are allowed to be split. The router will split the packets based on the MTU value of the interface. Therefore, even if the length of the ping packet is greater than the MTU value of one end, the ping may still be successful. To ensure that all forwarding services are normal, the MTU value of the interconnect port must be configured to be consistent.
5. The receiving optical power and the receiving sensitivity of the optical module, and the overload optical power are the optical power received by the optical module. The receiving sensitivity is the lower limit of the optical power that the optical module can normally receive, the overload optical power is the upper limit of the optical power that can be normally received by the optical module. Only when the received optical power of the optical module is not lower than the receiving sensitivity and not higher than the overload optical power can the optical module work normally, when the receiving optical power of the optical module is lower than the receiving sensitivity, the physical status of the interface may fluctuate repeatedly. The above are some of the common faults of Huawei routers when setting up WAN. If the same problem occurs, refer. This article is from