DSM-G600, DNS-3xx and NSA-220 Hack Forum

Only you can determine if the gain is worth the risk.

There is potentially a significant gain in throughput - notice the use of the word potentially.

It seems to me that a lot of the potential gains of jumbo frame are not achieved in day to day use unless the file size or perhaps the volume of data is substantial - I can move better than a gigabyte/minute when it's a single large file, but moving 12GB of smaller files can take in excess of five hours.

In terms of the risks - I have been running 1.05 since D-Link made it available on the US support site, I have seen no negatives, however, not everyone here shares my opinion, many feel that 1.05 introduces serious security holes.  It's not that I disagree entirely with them, but, perhaps that I simply have lesser expectations of what a SOHO NAS should provide in terms of security.

SilentException wrote:

oh and if you're wondering, you can't use telnet of ssh to do this simply because the moment you disable
network interface, your connection drops

I wouldn't want to disagree - but - I can distinctly recall threads in this forum about the use of jumbo frame, prior to the release of fw 1.05 and there was a series of instructions on how to achieve it using telnet.

Let's put it this way - I don't recall a restart of the network interface being mentioned - maybe it wasn't, maybe it was and I missed it.  What I do know is it never worked for me and maybe that's the reason why.

ok, just performed the upgrade and ran into a snag with a degraded raid array even though the unit before the fw upgrade was running in standard mode. Just in case, you can read the resolution here.

http://dns323.kood.org/forum/t2655-Righ … ading.html

With Jumbo Frame of 9000 Bytes, there was a significant increase using oken's banchmark tester. Write increased from 12.5MB/sec to 15.85 MB/sec and read increased from 15.5 MB/sec to 23.78 MB/sec. NIC+switch+NAS supports Jumbo Frames. Here are the results of going from 1.04 to 1.05 (with Jumbo Frame support).

Running a 200MB file write on drive U: 5 times...
Iteration 1:     15.61 MB/sec
Iteration 2:     15.9 MB/sec
Iteration 3:     15.88 MB/sec
Iteration 4:     15.88 MB/sec
Iteration 5:     15.98 MB/sec
------------------------------
Average (W):     15.85 MB/sec
------------------------------
Running a 200MB file read on drive U: 5 times...
Iteration 1:     21.02 MB/sec
Iteration 2:     24.11 MB/sec
Iteration 3:     25.7 MB/sec
Iteration 4:     23.7 MB/sec
Iteration 5:     24.38 MB/sec
------------------------------
Average (R):     23.78 MB/sec
------------------------------

Now the million dollar question, what about wireless notebooks (not Jumbo Frame supported) accessing data on the Jumbo Frame desktops. Will there be any detrimental issues with the stability or security of the network?

Last edited by mealto (2008-07-31 03:34:08)

Unfortunately, shortly after Jumbo Frames were enabled, the Gigabit network became unstable. Maybe it's one of the older machines but CPU usage would spike to 100% and network would grind to a halt. Jumbo Frames off now until further notice.