RB751U-2Hn frequent (daily) reboots

[frankie]

I can send simple L2TP Server+NAT config to confirm that every RB750, RB750UP, RB750GL, RB751U, RB751G will reboot if run btest on two PC (endpoints). Interestingly this not happens on ROS 4.17, but only on 5.x. Sadly only RB750 supported by ROS 4.17, thus all other RB unusable under high loads, because of random reboots.

In your test Normis CPU load rerely hops over 50% (maybe once, but it can be login via winbox from other PC).

@normis

@nz_monkey

@jhheider

Here’s the steps that will reliably spin up the flash:

Using my config (or any other it seems) do the following:

On a computer on the WIFI AP load up high-bandwidth, multi-stream traffic (I use debian CD ISO torrents). Once it’s running, snmpwalk the router. About halfway through (right before it checks the disk, I suspect), the flash process will go to 100%, the management sessions will freeze, the snmp query will timeout, and the router will remain pegged until the traffic is stopped, at which point it will go back to normal.

(updated to ticket # 2012062266000481)

This is the exact issue we are seeing on RB751U, RB750UP, RB750GL and RB2011. If we swap them out with a PPC router e.g. RB1200 the problem goes away completely.

Ok you both. I did the test as described, and had no issues. Please tell me what I did wrong: