cnWave v2000 PTP IPMTU

I am running up against an issue that I’m not sure if I have something programmed wrong, or it’s just the limitiation currently for the system.

I can only get OSPF to negotiate if I have the IPMTU set at 1526. I’ve incrementally tried more than that and it fails.

So despite the datasheet saying it supports 2000, I can only get it to support 1526. Anyone else have this issue?