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Forum Discussion
jumbo frames slow things down
Hi,
I have a pc with NIC capable of doing Jumbo Frames (9K). It´s connected to a netgear GS108. The label of the GS108 says GS108GE and has serialnumb 21620C3H0025A.
On the netgear site it says this switch is supporting JF since serial numb starting 1DR or 127x5B or 127x5C.
My ReadyNas Ultra 2 is also connected to the GS108 and when not using Jumbo Frames a large .iso file coppies to the NAS with approx 55MB/sec.
When I turn on Jumbo Frames on both the PC and the NAS performance drops below 10MB/sec.
Which seems a bit odd ? Is there something wrong with the GS108 ?
Frank
I have a pc with NIC capable of doing Jumbo Frames (9K). It´s connected to a netgear GS108. The label of the GS108 says GS108GE and has serialnumb 21620C3H0025A.
On the netgear site it says this switch is supporting JF since serial numb starting 1DR or 127x5B or 127x5C.
My ReadyNas Ultra 2 is also connected to the GS108 and when not using Jumbo Frames a large .iso file coppies to the NAS with approx 55MB/sec.
When I turn on Jumbo Frames on both the PC and the NAS performance drops below 10MB/sec.
Which seems a bit odd ? Is there something wrong with the GS108 ?
Frank
12 Replies
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- I had similar issues: viewtopic.php?f=21&t=51676&p=295250#p295250
I gave up. :-( - Do you have the latest NIC drives installed on your PC?
Could you try a direct-connection using a known working Cat5e or newer ethernet cable to eliminate the switch as the issue? See http://sphardy.com/web/readynas/how-to-direct-connect-to-your-readynas/ - Yep - installed last drivers which are from Jan ´11.
I tried the direct connection as indicated to exclude the switch and the results are the same. My writing speed to the NAS is roughly the same as with the switch in between and when switching on the Jumbo Frames on PC and NAS the speed drops enourmously.
By coincidence I discovered this only happens on LAN port 1. When I plug into LAN port 2 there is no drop in speed (but also not an increase).
When I have the direct cable connection in place should I be able to do a possive 7000 bytes non-fragmented packet ping to the NAS ? - Hi folks
I went through a whole round of trouble shooting with my Windows 7 x64bit system and realised that Jumbo Frames actually significantly reduced performance. I went from 11MB/s - 5 MB/s to (after disabling it on both server and NAS) 20MB/s - 24MB/s!
So a warning to those out there with Windows 7, its seems that setting your ReadyNAS NV+ to Jumbo frames actually reduces performance.
I am running on RAIDiator 4.1.7 [1.00a043]
Maybe the ReadyNAS team can shed some light as to why this performance "feature" doesnt seem to work well on Windows 7? - I can confirm that I'm also on W7 ULtimate x64.
- I can also confirm this and I am also on W7 Ultimate x64
- Same issue with Windows 7 Home Premium 64bits. Turning jumbo frames off improved my speed (avg 21 mb/second write).
All drivers are up to date (P5Q board). - Is it possible that somebody from Netgear support provide a view to this ?
Thanks, - I have the same issue with Win7 Ultimate 64bit. Latest NIC drivers, leaving jumbo frames off for now.
- I have a
Readynas nv+ v1 (RAIDiator 4.1.10 [1.00a043] )
prosafe switch (GSM7224)
pc under win7 64 home premium
the throughput is far better WITH than without jumbo frames, no doubt (at least for me...).
it was worse before, when the Jf was not activated on the switch (+/- frames size set to 1500), but since it is correctly set up, the throughput is far far far better (copying from my PC to the NAS: from 1,5MB w/o JF to 45/60 MB w. JF .....).
NB: JF must be supported AND correctly set up on every device you use: PC > switch or router > NAS etc..
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