Internet loses speed on second router.

A

Aluroth

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Hey guys,

I have a Huawei B315 that connects to Telkom LTE. Then from the B315 I have an Asus RT-AC51U connected (from WAN port to WAN port). I then use the Asus to automatically detect the internet settings. Now the problem is when I connect a device to the asus router, I get 10-20mbps slower speeds than when connected to the B315 (25-30Mbps against 40+Mbps). Anyone know what may cause this? I've tried disabling the firewall on the Asus but it did not made any difference.

Regards
 
I don't know... What is default gateway on Asus?

Secondly there is conceptual error: "(from WAN port to WAN port)". It should be read: Huawei LAN port to Asus WAN port. It gives proper connection. Note: when you have to use Huawei port 4 (WAN/LAN) port, you have to go to the setup Web page and change function of this port from 'Auto' to 'LAN'. If you don't, Huawei might be confused by the presence of other router and activate WAN connection on this port.

Correct configuration is as follows:

1. Use static IP for ASUS WAN interface, outside of Huawei DHCP range. Use 192.168.8.2 in this example (Huawei default IP is 192.168.8.1).

2. Enable DMZ on Huawei and put here ASUS WAN IP 192.168.8.2 (see above).

3. Make sure that ASUS default LAN interface IP address is in different LAN segment than Huawei. In this example it has to be different than 192.168.8.1-255. Change default value if appropriate.

Note: When you do initial configuration of each router, connect such router by cable to the PC, with all other devices disconnected and power-off then power-on of the router. Reset to defaults is recommended.

4. Connect both routers by cable as described in the beginning of this post and restart. Connect PC to Asus.

5 Verify default gateway IP settings on Asus. It should read 192.168.8.1. Adjust if neccessary. Internet should be flowing now. I prefer manual setting here. It makes configuration more robust (independent of power on sequence).

6. It is recommended to setup manual DNS on Asus, it will make it independent to DNS relay on Huawei. It could be your ISP DNS addresses, Google, or anything according to your preference.

Please give feedback how speed is changed.
 
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As above but I would use the WAN port on either.

Just do a straight LAN to LAN so the Asus is nothing more than a switch.

Disable its DHCP server and job done.

Shouldn't t even need to add it as the DMZ on the Huawei as it's won't be running in a router mode.
 
Okay, I've tried both of these approaches and still losing some speed, it seems better but not 100% :(. I'm not sure what is causing this, if I copy from PC to PC it goes 12MB+.
 
Are you using wifi for your devices when you say you copy from device to device or are they all plugged in with cables? (If wifi then obviously the wifi on asus not that good)

And lan port to lan port should be used between the Asus and Huawei like SauronZa pointed out, and only one should be the DHCP server, preferably the one where your devices connect to... but, not sure about the asus, if you cannot specify the gateway in DHCP then the Huawei will have to be the DHCP server. If that is the case setup static IP's and see if the speed improves... just for a test
 
Seems the Asus has slow LAN ports. That is your PC to PC speed is limited to about 12 MBps. Could be part of your problem?

http://foxnetlab.com/index.php/16-reviews/153-asus-rt-ac51u
It's obvious that in this case Fast Ethernet interface is a bottleneck.
The measured speed was about 11 Mbyte/s, which corresponds to the performance of Fast Ethernet.
The device is fitted with 100 Mbps Fast Ethernet ports...
Click to expand...
 
furpile said:
Seems the Asus has slow LAN ports. That is your PC to PC speed is limited to about 12 MBps. Could be part of your problem?

http://foxnetlab.com/index.php/16-reviews/153-asus-rt-ac51u
Click to expand...
Yip, it seems very unbalanced with higher speed over WiFi. I didn't expect it from such capable router.
It gives a question about internal traffic over LAN, as local traffic can quickly saturate switch maximum capacity.

Please post results with all LAN clients unplugged, except the client which is testing Internet speed.
 
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