How to do troubleshooting from the system log when PPPoE connection fails?

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Gabriel Ferguson
6 years ago
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1 How to do troubleshooting from the system log when PPPoE connection fails? This Article Applies to: This FAQ is for the users who have a DSL bridge modem with PPPoE service and need to do PPPoE connection on the TP-link router. If you are using Cable Modem, please ignore the article. The PPPoE connection includes two phases: PPPoE Discovery phase and PPPoE Session phase. There are four steps to the Discovery stage: PADI, PADO, PADR, PADS and three steps to the Session stage: LCP, Authentication(includes two types: CHAP and PAP) and IPCP. The three cases below are about how to read the system log of the router to find out why the PPPoE connection fails.

connected. The the system log is as below: Case 2.

2 Case 1. If the PPPoE connection is successful, it will get through the PPP Discovery phase and Session phase, then shows PPPoE connected. The the system log is as below: Case 2. If the username or password is incorrect, it can get through the PPP Discovery stage, but in the PPP Session stage, there would be an error message: Failed to authenticate ourselves to peer. In this case, you need to check the username and password with your Internet service Provider. The system log is as below:

3 Case 3. If the WAN port is unplugged, it cannot get through the PPP Discovery Stage. It repeats sending PADI packets, but never succeeds. In this case, you need to check whether you have correctly plugged your modem into the WAN(Internet) port of the router. The system log is as below: Note: You need to log in the router s web management page, go to System Tools System Log to read/save the log. If you do not know how to log in the web management page, please refer to FAQ 87. How to improve my wireless speed or range? Overview: To improve the wireless speed or range, it is highly recommended to work on the following common solutions: Choosing the best location Optimizing configuration of the device Upgrade the equipment

Symptom: Weak wireless signal showed, low wireless speed or range. Cause: The factors most frequently affecting the wireless signal: 1) Intrinsic factors: Transmission Distance.

4GHz bands, the wireless signal will be reduced significantly and transmit in shorter range due to higher frequency. Antenna.

4 Symptom: Weak wireless signal showed, low wireless speed or range. Cause: The factors most frequently affecting the wireless signal: 1) Intrinsic factors: Transmission Distance. Regarding on the wireless device particularly working on 5GHz band, it will be more sensitive to the obstacle. Though there will be more clear channels than those of 2.4GHz bands, the wireless signal will be reduced significantly and transmit in shorter range due to higher frequency. Antenna. Omni-directional antennas and directional antennas Omni-directional antennas are resembled in our home products like wireless router or wireless ADSL2+ Modem Routers, they radiate horizontally all around, but are weaker upward or downward as the picture shows. While a directional antennas radiate strongly in a particular direction which are usually used for high power outdoor products. The gain of a directional antenna increases, also with the coverage distance, but the effective coverage angle decreases. Generally, the higher gain value of an antenna, the better directional ability will be.

This phenomenon will be more significant once you deploy the High-Gain antenna, so we recommend that to

5 For directional antennas, the lobes are pushed in a certain direction and little energy is there on the back side of the antenna. Please refer the picture below. This phenomenon will be more significant once you deploy the High-Gain antenna, so we recommend that to confirm precise on horizon direction otherwise there be unexpected dramatic signal loss. Wireless Communication Performance. Higher transmission rates, better performance

6 2) Extrinsic factors: - Physical Barriers, such as wall or clapboard and so on; - Other similar devices and other sources such as microwave ovens, cordless phones or other technologies that use the same band as Bluetooth - There are more than one AP or wireless routers working in the same Channel. - The location where an AP or wireless router is placed. You'd better to place the device at a higher location to reduce the barrier s countercheck. Solution: l Choosing the best location 1) Antennas should be positioned for best location and direction - Deploy the antenna in good location and correct angle, and also make sure your wireless client devices are in the coverage; - For multi-story buildings wireless coverage, we recommend to placing antennas at 45 degrees (diagonally) or 0 degrees (straight out parallel to the floor) which will be more effective. Since antennas always transmit weakly at the base, do not place your wireless client device at the bottom of TP-Link wireless router or access point. 2) Try best to avoid the extrinsic interference - Avoiding the physical interference in the wireless coverage, each wall or ceiling will have a negative effect on wireless radio particularly the ones built by solid metal material ; - Keep your device away from various electromagnetic noise sources that generate RF noise, like microwaves, Monitors, electric motors, copying and fax machines, etc. l Optimize configuration of the device - For TP-Link wireless products, we recommend to do corresponding settings to avoid the interference from other networking and radio frequency equipment. First, please log into the product and you can refer to this link as guidance. Here we take TL-WR1043ND user interface as an example and then please go to Wireless->Wireless settings and change the channel settings, the default value is Auto and here we recommend select 1, 6 or 11 if you suffer high wireless interference.

For 802.11b&g, there are 14 channels designated in the 2.

7 For b&g, there are 14 channels designated in the 2.4 GHz range and three non-overlapping channels recommended: 1, 6 and 11 (1, 7 and 13 in part European region, please obey your local regulations or laws). Sometimes the well-known channels will be also crowded and we recommend to select the appropriate one adjusted to your local environment. l Upgrade the equipment - If you want to have a big improvement immediately and boost the wireless throughput, you can also choose to upgrade a combination of antennas or other wireless equipment to enhance the wireless transmission; - If you are in a congestion wireless environment, the wired connection can be taken into consideration and the TP- Link Powerline equipments is a good alternative.

8 What are the most frequent asked questions about the TP-Link routers' speed? This Article Applies to: Q: What does 150 Mbps and 300 Mbps Routers mean? A: 150 Mbps and 300 Mbps means the maximum wireless links speed the router can provide. It is the internal WLAN connection speed between the computer and the router, not the internet speed. Q: How do I know my actual internet speed? A: There are various speed-test tools online.you can try with the most popular site: Although this test is Flash based and not very accurate. For an accurate test you can look for an HTML5 speed test like: speedof.me. Q: Why I can only get 1.2 Mbps download speed for instance, when the router says it is a 300 Mbps device?

9 A: As stated above, 300 Mbps refers to the WLAN internal link speed between the router and the computer, it is different from the actual internet speed. The internet speed is mainly decided by your ISP. Q: Why I am getting 1MBytes/s download speed while my ISP provide a 8M network, for instance. A: Usually here 8M means 8Mbps Mbps or Mb/s means megabits per second while MBps or MB/s means Megabytes per second, there are 8 bits per Byte. It is important to clarify whether it is Mb or MB since they differ by a factor of 8. Q: My Fiber internet is 200Mbps but I can only get a maximum 90 Mbps with a TP-LINK router like 300Mbps TL-WR841ND, why? A: The real internet speed depends on the following: The Speed you pay for, serivce connection type, the capability of the router, the current load on the provider's network and the types of cables used. Different routers have different capabilities to handle internet data (NAT Throughput of WAN to LAN ), the maximum bandwidth TL-WR841ND can handle is about 90 Mbps. For NAT Throughput of WAN to LAN direction of TP-link routers please refer to: Q: Why my link speed on the computer shows 54 Mbps when the router says it is 300 Mbps capable, for instance? A: Different wireless clients negotiate different link speeds with the wireless router, based on the wireless modes, distance, and noise level (the level of interference from other wireless transmissions).

10 To get IEEE n speed, both the wireless router and wireless client have to support 11n mode. If either the wireless router or the wireless client can support only 11a or 11g, the link rate would be a maximum of 54 Mbps. Q: Why my wired local network link speed on the computer shows 100 Mbps when the router says it is 150 Mbps/300 Mbps capable? A: As we explained above, 150 Mbps/300Mbps refers to the maximum wireless link speed. The wired local network link speed is decided on the capability of router s LAN ports, the characteristics of Ethernet cables and the Ethernet Adapter of the computer. If the router has 100mbps LAN ports, the local network link speed will show 100Mbps.

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