Posted: Thu Apr 05, 2018 23:34 Post subject: Shortcut Forwarding Engine - OFF = WAN Speed degradation
Router - Dlink DIR890L
Firmware: DD-WRT v3.0-r35034 std (02/17/1
(was on R30016 before this - same issue)
I thought this was caused by the latest version of YAMON (3.4), and blamed that - but that is an artifact as YAMON requires SFE turned off to see all the traffic (other posts relate to this).
Restore router to default config I have (nothing special, just normal wifi, about 15 reserved IP's, no non standard services activated). SFE on by default. Router runs fine for ages with speedtest showing 98/38 or thewre abouts.
Now tick off the SFE, save, activate and restart router. As the day progresses, speed test goes lower and lower on download and upload. By the next morning, I have under 10 down and 3 up. If I leave it for another day, the router gets unresponsive - ever have to hard power it off as gui not accessible.
I am not a linux/router expert, but the load average seems to go hand in hand with this over time WAN speed degradation. After a router reboot it is 5-6% and by the next day it is 66% and rising slowly. I believe I have seen it at 80% in one of my tests.
Syslog only shows hourly time updates - no other errors at all.
Obviously, I can just leave SFE turned on - as per its design, however I would like the full use of YAMON - however, but the end of the month, I will be converting to an unlimited internet plan - which means yamon is not so important - but still a nice to have.
Posted: Fri Apr 06, 2018 1:51 Post subject: Upgrade
First Upgrade. That very well may fix the problem SFE was still be actively worked on when that build was released. See the link in my signature.
I still leave it off but I have not encountered any speed slow downs on any of my routers. _________________ Before asking a question on the forums, update dd-wrt: Where do I download firmware? I suggest reading it all.
Some dd-wrt wiki pages are up to date, others are not. PM me if you find an old one, I am trying to update them.
Netgear R7800 - gateway, DHCP, QoS, VPN
TP-Link Archer C7 v2 x2 - WDS AP, WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - WDS Station
D-Link 615 C1 x 4 - not used
D-Link 615 E3 x 2 - not used
D-Link 825 B1 - WDS Station
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - WDS Station
UBNT loco M2 x2 - airOS
Asus N66U - backup Gateway
Netgear r6300 v1 - AP
Linksys E2500 - not used
Linksys EA2700 - not used
Linksys 160N v3 x2 - not used
Netgear WNDR3700v3 - not used
UBNT EdgeRouter X - not used
I have 35550M running on my 890L A1, sfe disabled.
Just did a simple speedtest thru 5GHz wifi yesterday and today, and both reached 350Mbps. Device used is ipad 2017. Maybe you can try Kong's latest test build. _________________
Netgear R7800 kongpro 19.07 20190919 || Netgear R7000 36070M kongac (Client Bridge=5GHz, AP=2.4GHz with bridged VAP)
Linksys WRT32X davidc502 OpenWrt || Linksys WRT1200ACv1 Gargoyle 1.11.x
Linksys WRT1900ACSv2 dd-wrt 39956
OK - Installed kong - dd-wrt.v24-K3_AC_ARM_R8000.bin
Reset to factory on restart.
Re-Keyed my config, I have detailed the only things I change below (done it a few times now)
If this has the samethe same speed drop as time goes on, then I am stumped - I guess I would reset to factory and NOT change anything and see if that makes any difference.
Fingers crossed for tomorrow.
DD-WRT Basic Setup Tasks :
Router Name - DIR890L
Local IP / Mask 192.168.1.1 / 255.255.255.0
DHCP Server 192.168.1.100 / Maximum 99
Static DNS 1 - 220.127.116.11
Static DNS 2 - 18.104.22.168
Static DNS 3 - 22.214.171.124
Time Settings - Enable - Australia/Queensland
Time Settings - Server IP/Name au.pool.ntp.org
IPv6 tab Disable
SFE Engine - Disable (was the default on this kong build)
The_IT_Crowd, Channel - 3, No beamforming, AP Mode, NG-Mixed, 20Mhz
Vaises_AC_Only, Channel - 116, explicit beamforming, AP Mode, AC Only, VHT80 (80 Mhz)
Set password - WPA2-Personal, same on each, save and restart router.
Services - USB Tab Enable Core USB Support
Services - USB Tab USB Storgae Support
Services - USB Tab Automatic Drive Mount.
Services Add static Macs (about 50)
Services Secure Shell - enable SSHd
Services System Log, enable 192.168.1.10
Thanks for that channel info stuff - I have changed it to 6 as you suggested. Im my case it likely does not matter as that 2.4ghz wifi is only used by one printer and one garadget smart home device - both only metres away from it. I have an access point at the other end of the house that all the other smart home things connect too on 2.4. All 'real' devices use 5Ghz. Cheers.
So - The kong build fixes this issue. I tries 3 different releases of the other stream, but this is the first time I have gone a day and remained with my actual speed I pay for. Have no idea what is up with the others, but I will stay here now on this one. Thanks.
I get the SFE thing - The reason I need to disable it is for Yamon to see all the traffic. Disabled = unusabe the next day, enabled = all fine. The kong build is fine if enabled or disabled. The others (the ones where it is enabled by default) are NOT fine if you disable it. I have done days of testing of this.
Second day - no speed issues at all - all is stable and happy. Thanks for the tip on kong - the only one without this issue on my dlink DIR890L. I wasted many days in testing this, and at first blamed YAM before by trial and error (and many factory resets) it was proven to be SFE.
I own a DIR890L as well, so following this thread is quite interesting.
BTW: Which Kong-Release did you install?
A statement from BS/Kong on this issue would be higly appreciated.
Kong is dd-wrt.v24-K3_AC_ARM_R8000.bin.
However I have had a major setback with my testing. I was not getting yamon to match the router wan downloads/uploads. SFE was OFF - but it was as if it was ON. I turned it on, rebooted, turned off, rebooted and do some more downloading - still yamon could not see the data.
Maybe this kong release has SFE on whether you like it or not ?
I have decided to give up for a while on the dd-wrt and yamon. I have relegated this DIR-890L to an access point (still with kong) and have promoted my Asus-RT-AC68U as the main router. I put asuswrt-merlin on it and have set that all up now (a very nice interface), the traffic monitor built in looks like it will do what I require also. I will have a few months rest/test/bed in and may give dd-wrt another go but right now, I have everything working (traffic monitoring, 30 reservations, 6 roku's using smart DNS, all machines labeled with names, torrents tested etc). Their graphic iphone app is fantastic also. Had I known, I would have got two of these I suspect and their AI Mesh to play with.