[s1m0nw]

Hi guys,

I used to use this software on my old asus rt n66u router and worked a treat no issues.

I have now put it on tp link archer c7 v5 router and found my broadband speed has reduced by more than half.

I am on virginmedia uk 200mb, when using their router i get speeds of 213mb via ethernet, but using tp link hardwired i am only getting 20/30mb, so as you can see its a good drop.

I have searched and tried several things still no luck.

I am using  DD-WRT v3.0-r44538 std (10/13/20)

Any help would be appreciated, many thanks

[msoengineer]

The first place to check is to make sure your cables and anything connected is actually running at 1gbps speed.

Cables that work on one router may not work the same on another because of damage or sensitivity of older cat 5 cables sometimes allowing 1g connections. Make sure the cables are all cat 5e or better.

Check the setup>switch config tab and make sure things show in green which = 1g. Yellow = 100mbps.

If that checks out, the next place to look are your settings. You may need to reset back to factory settings and follow my signature for your WiFi settings.

You'll need to tell us how things are hooked up, too, to understand if you have something going on inbetween. You'll need to make sure that your modem is in bridge mode so you aren't performing double NAT. Router and Modem both doing network work....

[s1m0nw]

Thanks for speedy reply, I will use this time to explain setup.

Virginmedia superhub 3 connected to tplink router via cat 7 cable.

Testing both using wifi on samsung android phone

Virginmedia 5hz- 85mb down and 21 up
Virginmedia 2.4hz - 41.03mb down and 20mb up

Tp link 5hz - 65mb down and 20mb up
Tp link 2.4hz - 17.43mb down and 21mb up

Testing hardwired (cat 7 between router amd tp link with cat 5e cable between tplink and laptop)

Download - 23mb and upload 21mb

Testing from virgin to laptop using cat 5e cable

Download 48.95mb upload 21.10mb

Testing from virginmedia using the cat 7e cable

Download 38.26mb and upload 20.90mb

Virginmedia have throttled speed due to time of day

Speeds look totally inconsistant now. When I last checked it i was getting like just over 200mb and 30/40 when hardwired using cat 7 between the 2 routers and cat 5e cable from tp link to computer. I have added screenshot of switch config screen

[servicetech]

[s1m0nw]

1. You should get more on a C7 v5 single core 750Mhz if you don't use CPU intensive services as QoS or VPN. You need Shortcut Forward Engine enabled.

I use VPN occasionally

2. If you use external modem you should try lower setting on the WAN port for MTU. Default is 1500, try 1400 and compare speed.

Have altered this will test it out

3. The r44538 build may have speed issues depending on hardware. If you did update from old version you should reset settings to defaults and manually redo your settings.

I came from a 2018 build, now on the latest redid all settings as I read you couldnt upload previous version settings to new version.

4. If you cannot solve it with the installed build you should flash older build like r42819 & reset settings & manually setup and compare speed against the previous build.

Will see how we get on

Thanks for your reply

[servicetech]

[ho1Aetoo]

"switch" tab says 100Mbit on LAN port 1

[s1m0nw]

testing wifi speeds after adjusting them as per the above signature they seem to be closer together.

as for config, I noticed that will see if I have another cable to try.