Bug 198927

Summary: if_msk TCP fragmentation causes NFS mount fail
Product: Base System Reporter: Beeblebrox <zaphod>
Component: kernAssignee: freebsd-net (Nobody) <net>
Status: Closed Feedback Timeout    
Severity: Affects Only Me    
Priority: ---    
Version: CURRENT   
Hardware: amd64   
OS: Any   
Attachments:
Description Flags
single packet from Wireshark dump none

Description Beeblebrox 2015-03-26 15:13:26 UTC
Created attachment 154831 [details]
single packet from Wireshark dump

I'm PXE/diskless booting a Samsung RS40 Laptop. The Diskless root normally gets mounted by clients as V3 and read-only.

* This is the only NIC among my clients displaying this problem.
* The client gets to the NFS_mount stage, then the if_msk interface keeps getting toggled up and down, without being able to mount the NFS root.
* Wireshark warns of TCP fragment "New fragment overlaps old data". Attached single packet as text from Wireshark dump.

Is this an msk(4) problem or some screw-up on my end?