Jumbo Frames on Fire TV?

[Sizzlechest]

I just realized something. I have a Diskstation 211J that I use as my file server. There are a few movies that always buffer, probably because it's a high bitrate. But I also just realized that I have my computers and file server configured to use jumbo frames. Is there a way to configure this on the Fire TV?

I believe the network settings for the wireless adapter MTU can be found here:

/sys/class/net/wlan0/mtu

However, I'm afraid to change it without losing connection to the FireTV

 

[Sizzlechest]

Okay, I tried this:

cat /sys/class/net/wlan0/mtu

and I got 1500 back.

Then I changed it to 9000:

echo 9000 > /sys/class/net/wlan0/mtu

and when I reran the first command, it reports back 9000. I rebooted and it went back to 1500.

EDIT: Another way to look at MTU:

ip link show dev wlan0

to set it to 9000:

ip link set mtu 9000 dev wlan0

EDIT #2:
This also shows it's set to 9000, but I can't confirm it's working:

/system/xbin/ifconfig

Can also set it with ifconfig:

/system/xbin/ifconfig wlan0 mtu 9000

Anyone know how to restart the network service?

 

[dbdoshi]

Isn't the jumbo frame feature only supported on wired connections? I could be wrong, but if you are trying to enable it over "wlan0", it might not work, even if you set it at a higher MTU size.

And because the FTV does not have a gigabit wired connection, I think jumbo frames wouldn't work over wired as well, especially the 9120 (9K) MTU, though it might support lower sizes.

 

[Sizzlechest]

Isn't the jumbo frame feature only supported on wired connections? I could be wrong, but if you are trying to enable it over "wlan0", it might not work, even if you set it at a higher MTU size.

And because the FTV does not have a gigabit wired connection, I think jumbo frames wouldn't work over wired as well, especially the 9120 (9K) MTU, though it might support lower sizes.

You are correct. In fact, I'm going to try disabling jumbo frames on my file server.

 

[Neo3D]

I'm running my AFTV on wired ethernet and getting buffering issues like you. So, from what I'm getting out of this thread, our AFTV's do not support Jumbo Frames because it doesn't have a gigabit port?

 

[dbdoshi]

I'm running my AFTV on wired ethernet and getting buffering issues like you. So, from what I'm getting out of this thread, our AFTV's do not support Jumbo Frames because it doesn't have a gigabit port?

That is my understanding as far as I remember. Plus, with zero guidance from Amazon on that, you would not know the correct max size that FTV would support (if it even did with their network drivers). So you would be basically guessing or sniffing traffic to arrive at the optimum setting. Any frame mismatch along the hop from your external storage to FTV would result in fragmentation or worse, the devices might just randomly disappear on each other unless you segregate mismatched MTUs on separate VLANs. That is the extent of my very shallow understanding of that.

On a side note, I have a setup where I have an UNMANAGED switch that is hooked to my router via powerline. Then I have my FTV and Western Digital MyCloud hooked into this switch. If you have a similar setup, you might try a MANAGED switch (or a router) that might increase your throughput by routing your FTV and storage traffic for each other more optimally. Just a thought that just came to me...

 

[mattvirus]

jumbo frames = gig only
Managed/unmanaged I have noticed zero difference on my network.
Moving from XBMC to SPMC solved all of my buffering issues. I'm still running the 13.x version of SPMC on all my AFTV's in my house with a shared mysql library and huge server holding content.