[DRBD-user] drbd not working with high mtu?

Harka Gyozo SA carlos at gamma.ttk.pte.hu
Mon Feb 3 07:57:59 CET 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

> Try ping with a 10K size and the don't fragment switch set. Lower 
> the size until it works.
> ping -M do -s 6800 -c 1 <host>
> Exactly what I was going to say. Remember though to set the ping 
> payload to 28 bytes less than the MTU you set to allow space for the 
> ICMP overhead. So if you set 7200 (sounds like a realtek...), use '-
> s 7172', etc.


You all had right, so this is the driver/hw limitation of my system ( lower
than I can set ), and yes that's a realtek NIC...


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