MTU problem on ProCurve 1810G

[adelphi]

I cannot send ICMP packets largen than 504 byte to or accross my ProCurve 1810G.

"ping -l 504 x.x.x.x" gives a reply, but e.g. "ping -l 512 x.x.x.x" doesn't!?

Status "port summary" show MTU 1518 for each port.

I already tried jumnoframes on/off -> no change.I don't find any other setting regarding MTU...

Any ideas?

P.S. This thread has been moved from Switches, Hubs, Modems (Legacy ITRC forum) to Web and Unmanaged. -HP Forum Moderator

[printermeister]

I encountered the exact same problem on two brand new 1810G's. The fact that I had configured them identically provided the clue - I had done a firmware upgrade to P2.2 (via the intermediate firmware, whatever what was) before doing anything else to both of the switches. There must have been some sort of anomaly that got propagated with the original internal configuration. Once I did a factory reset and reconfigured the switches again, the problem went away. BTW, running them Jumbo and tagged VLANs, no problems.

[adelphi]

Got another solution from HP support:

Open http://%IP%/autoDos.html (hidden config) and disable "Prevent Ping of Death Attack".