500 mbit with stock ISP router, 400 mbit with DDWRT

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douglip
DD-WRT Novice


Joined: 01 Sep 2020
Posts: 6

PostPosted: Mon Oct 26, 2020 5:23    Post subject: 500 mbit with stock ISP router, 400 mbit with DDWRT Reply with quote
I have a 500/500 mbit connection.
My stock ISP router easily achieves 500/500 with my computer connected over LAN (sometimes even surpasses it).

But if I connected my NETGEAR R6700v3 router flashed with DD-WRT v3.0-r44191 std (08/15/20) to the ISP router LAN port, then connect my computer to the DD-WRT router, I can only get around 400/400 (sometimes even less).

I noticed that with QoS on in DD-WRT, even though it was set to 500/500, I only managed to achieve 300/300. Now that I have disabled QoS, the speed is still only 400/400.

What could be going on here? Is the R6700v3 too weak to handle this speed?
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Alozaros
DD-WRT Guru


Joined: 16 Nov 2015
Posts: 4093
Location: UK, London, just across the river..

PostPosted: Mon Oct 26, 2020 7:20    Post subject: Reply with quote
many threads on the same subject...
with few words, try to turn SFE on, or buy a new router,your router has a max WAN speed limit, due to its CPU...
Better routers, with faster CPU's, deliver better performance.... next level router R7800 will do better...!

_________________
Atheros
TP-Link WR740Nv1 -----DD-WRT 44538 BS AP,NAT
TP-Link WR740Nv4 -----DD-WRT 44251 BS WAP/Switch
TP-Link WR1043NDv2 ---DD-WRT 45229 BS AP,NAT,AP Isolation,Firewall,Local DNS,Forced DNS,DoT,VPN,VLAN
TP-Link WR1043NDv2 ---DD-WRT 44849 BS AP,NAT,AD Block,Firewall,Local DNS,Forced DNS,DoT,VPN,VLAN
TP-Link WR1043NDv2 ---Gargoyle OS 1.12.0 AP,NAT,QoS,Quotas
Qualcomm/IPQ8065
Netgear R7800 -----DD-WRT 44719 BS AP,NAT,AD-Block,AP&Net Isolation,VLAN's,Firewall,Local DNS,DoT
Broadcom
Netgear R7000 -----DD-WRT 45420 BS AP,Wi-Fi OFF,NAT,AD-Block,Firewall,Local DNS,Forced DNS,DoT,VPN
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Stubby for DNS over TLS I DNSCrypt v2 by mac913
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 7610
Location: Texas, USA

PostPosted: Mon Oct 26, 2020 11:26    Post subject: Reply with quote
People wonder why a lot of the "older" Broadcoms run a 2.6 kernel in stock firmware. Prime example.

One thing, though. You are not telling us if you are connecting your DD-WRT to a separate modem or to your ISP router/modem. Double-NAT **WILL** make a difference.

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Welshchris
DD-WRT User


Joined: 05 May 2010
Posts: 120

PostPosted: Mon Oct 26, 2020 14:47    Post subject: Reply with quote
Where is "SFE" listed in ddwrt?

Im going atound in circles looking for it.
msoengineer
DD-WRT Guru


Joined: 21 Jan 2017
Posts: 1619
Location: Illinois Moderator

PostPosted: Mon Oct 26, 2020 15:08    Post subject: Reply with quote
shortcut forward engine, on the main setup tab
_________________
FORUM RULES

TIPS/TRICKS: Best QCA Wifi Settings | Latency tricks | QoS Port priority | NEVER USE MU-MIMO |
Why to NOT use MU-MIMO | Max Wifi Pwr by Country | Linux Wifi Pwr | AC MCS & AX MCS | QCA 5Ghz chnls to use | WIFI Freq WIKI | TFTP R7800 | Don't buy AX | IPERF3 How-To

[R9000]45478 nightly (Main Router)
[EA8500]43192 & 45417 (2xOffsite)
[R7800]napping
[WDR3600]BS 44715 (Offsite)
[A7v5]BS 43038 (Offsite+spare napping)
douglip
DD-WRT Novice


Joined: 01 Sep 2020
Posts: 6

PostPosted: Mon Oct 26, 2020 18:15    Post subject: Reply with quote
Thanks guys, it worked! With SFE on I get closer to 600 mbit!
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