lexridge
DD-WRT Guru
Joined: 07 Jun 2006
Posts: 2132
Location: WV, USA
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 Posted: Sun May 18, 2025 6:06 Post subject: Why is SFE needed on a switch? Or is it? |
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While SFE is usually used to gain throughput from LAN to WAN, why is it defaulted on a network switch? While I assume since dd-wrt is now supporting several RTL based switches, is it there for supporting a switch when being used as a router (pretty sure this is possible), assuming WAN<>LAN throughput. This would not be a normal situation for the 99%.
I noticed high CPU usage on my gs1900-48, probably averaging 12-28%. I disabled SFE and see no difference whatsoever. Still 12-28%.
These supported Zyxel switches are pretty darn cheap on ebay. Get yourself one and help test DD-WRT on a network switch. It's fun! 
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- Linksys EA8500: I-Gateway, WAP/VAP 5ghz only. Features: VLANs, Samba, WG, Entware - r60xxx
- Linksys EA8500: 802.11s Secondary w/VLAN Trunk over 5ghz - r60xxx
- Linksys MX4300: 802.11s Primary w/VLAN Trunk over 5ghz. 2.4ghz WAP/VAP only - r60xxx
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- Linksys MR7500, MX8500: None in production. Just testing. r60xxx
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BrainSlayer
Site Admin
Joined: 06 Jun 2006
Posts: 7726
Location: Dresden, Germany
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| Posted: Mon May 19, 2025 1:47 Post subject: Re: Why is SFE needed on a switch? Or is it? |
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| lexridge wrote: | While SFE is usually used to gain throughput from LAN to WAN, why is it defaulted on a network switch? While I assume since dd-wrt is now supporting several RTL based switches, is it there for supporting a switch when being used as a router (pretty sure this is possible), assuming WAN<>LAN throughput. This would not be a normal situation for the 99%.
I noticed high CPU usage on my gs1900-48, probably averaging 12-28%. I disabled SFE and see no difference whatsoever. Still 12-28%.
These supported Zyxel switches are pretty darn cheap on ebay. Get yourself one and help test DD-WRT on a network switch. It's fun! |
why is blahblahblah etc. .... included. because i can. you can run the switch also as a router first and sfe is harmless if enabled. it just increases performance of nocal network. for the cpu usage. the cpu usage is just caused by your webgui. the cpu has 2 threads. so 2 virtual cpu cores. in fact its just a single core mips cpu which is not the best performing one.
the webserver operated multithreaded.
but switching operations are done in hardware anyway.
so please no reports about the performance of the cpu. you can crank it up to 850 mhz. i havent unlocked this, because this is untested overclocking and might be risky
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"So you tried to use the computer and it started smoking? Sounds like a Mac to me.." - Louis Rossmann https://www.youtube.com/watch?v=eL_5YDRWqGE&t=60s |
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