Wavelength recommendations for low-rate and high-rate services


For optical-layer ASON, shorter wavelengths are recommended for low-rate services, and longer wavelengths are recommended for high-rate services. This ensures better performance for optical-layer services.

Other related questions:
PPPoE dialup service is unavailable and the network access rate is low
Root cause: 1. The AR router is tested. The test result shows that the router can normally forward packets, and the forwarding bottleneck is reached sometimes. 2. According to analysis of obtained packets, the TCP connection has been established and enters the data obtaining phase. However, the device receives RST packets (No. 15136 and No. 15137) from the Internet. As a result, the TCP connection is torn down. Procedure: 1. The networking where the PC is connected to the Internet through the router is tested and services are also abnormal. 2. The networking where the PC is connected to the Internet is tested and no fault occurs. Therefore, the PC works properly. 3. Run the tcp adjust-mss command to set the TCP MSS of the dialup interface to 1400, 1200, or 900. The fault persists. 4. In the networking where the PC is connected to the Internet through the router, services are still abnormal. Run the display health and display interface commands. The command outputs show that the CPU usage and uplink bandwidth usage of the interface are normal, and the interface works in full-duplex mode through negotiation. 5. Run the display fe slot 0 fe-id 0 fwd-status all command to check the packet forwarding status of the device. No severe packet loss occurs. 6. Run the display session number command to check the number of session entries on the device. In peak hours, the number of session entries reaches 16K. 7. Optimize NAT deployment on the intranet interface so that the number of session entries is smaller than the maximum value and users can normally access the Internet.

Rate of ESCON services
The rate of ESCON services is 200 Mbit/s.

Why is the association rate displayed on the STA low
The possible causes for the low association rate displayed on the STA include: - If the STA is far away from the AP, signals are weak, and the negotiated association rate of the STA is low. - If the 802.11n APs use WEP or TKIP encryption, the association rate of STAs may only be 54 Mbit/s (that is the rate of 802.11b/g). Because WEP and TKIP are not defined in the 802.11n protocol, the STA associates with the AP in 802.11g mode if TKIP encryption is used. - If the network adapter supporting only the 802.11b/g mode is associated with the 802.11n AP, the maximum associated rate is 54 Mbit/s. Alternatively, the radio type configured on the 802.11n AP is in 802.11b/g mode, so the AP supports only the radios in 802.11b/g mode. Try the following methods to resolve the problem: 1. Place the STA closer to the AP. 2. Change the encryption mode to CCMP in the security profile.

Why is the association rate displayed on wireless terminals low
- This is because wireless terminals are far away from APs. As a result, radio signals are weak. In this case, the association rate that is negotiated by the wireless terminals is low. Specifically, the signal transmission rate of 802.11g APs includes 54

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