Ok... I've updated both ends of the tunnel to OpenBSD 6.5 and the same problem exists when trying to pass packets of a certain size.
Any ideas on how to fix or work around this issue? Thanks in advance. Russell P. Sutherland Email: russell . sutherland @ utoronto dawt ca Network Engineer, I+TS Voice: +1.416.978.0470 4 Bancroft Ave., Rm. 102 Cell: +1.416.803.0080 University of Toronto Fax: +1.416.978.6620 Toronto, ON M5S 1C1 ________________________________ From: Russell Sutherland Sent: Thursday, October 10, 2019 16:25 To: misc@openbsd.org <misc@openbsd.org> Subject: Certain size packets not passing through a L2 over L3 IPsec tunnel I've set up a L2overL3 tunnel using the template as found in "man etherip". I am running OpenBSD 5.9, which I believe is the first version to support the etherip interface. I find the bridge/tunnel does not pass a small range of specific sized packets. E.g. if 1.2.3.4 is at the far end of the tunnel and I am pinging from the local end: ping -s 1388 1.2.3.4 works ping -s 1396 1.2.3.4 works All other sizes, 1389 to 1395 inclusive fail. Is there some way to remedy this? Thanks in advance. Russell P. Sutherland Email: russell . sutherland @ utoronto dawt ca Network Engineer, I+TS Voice: +1.416.978.0470 4 Bancroft Ave., Rm. 102 Cell: +1.416.803.0080 University of Toronto Fax: +1.416.978.6620 Toronto, ON M5S 1C1
