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FenterSpooner's avatar
Apr 23, 2013

Jumbo frames on RN314

Just wondering if anyone has tried changing the MTU on the eth0 interface on a RN314 (v6.0) unit? The default is 1500 but I tried bumping it up to 7000 which is where my RN1 unit is at and it completely broke my web interface to the unit when accessing from another gigabit wired connection. My built-in gig card on my system supports up to ~7k packets and works great with the RN1.

I had to connect to the RN314 using a wireless computer and then was able to change it back to 1500.


While it was reachable by ping, Raidator could not discover it.

9 Replies

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  • In V6.x much smarter to have a Jumbo Frames tick box then allow users to select frame size. Current implementation seems to indicate JF is not supported.
  • StephenB's avatar
    StephenB
    Guru - Experienced User
    claykin wrote:
    In V6.x much smarter to have a Jumbo Frames tick box then allow users to select frame size.
    Selecting frame sizes lower than 1500 is sometimes useful, so I'd like to see the frame size text box always active.

    Having a jumbo tick box to enable > 1500 values to be entered is reasonable, as it does make it more explicit.
  • evan2's avatar
    evan2
    NETGEAR Expert
    Hi FenterSpooner,
    We connect RN314 to Switch GSM7328S,
    It is ok if set MTU to 7000 on RN314 and GSM7328S,
    Could you tell me your built-in gig card model? We want to duplicate the issue and find root cause, thanks!
  • I'm running a Realtek integrated NIC (on my Gigabyte motherboard). It seems to work initially and then the web interface will not respond after some period of time. I do not experience the same type of issue with my NV (1st gen model) or Duo v1 so there is something going on. It is completely stable (barring some of the known issues with v6.0) leaving the mtu at 1500.

    I would do some tests where you are trying to backup or copy large amounts of data from a computer to a RN314 (make sure your NIC has jumbo frames enabled as it is usually disabled by default). I will perform the same test on two other machines and see if I can reproduce it. I'm using Windows 7 64-bit as my OS if that matters.
  • Same issue here with RN102 with 6.0.5. MTU size larger than 1500 slows down transfer rate considerably (less than 15MB/s). Realtek NIC JF set to 9K. Tried 3 recent Realtek driver versions. Same result with all.

    Reverted back to MTU 1500. Getting 50MB/s write.

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