Stephane Raimbault wrote:

So it seems that when I specify a ping of greater then 1468 the pings stop responding to the vlan interface on the freebsd router?

I also did a tcpdump while doing these pings from the freebsd router and it doesn't see any packets when specifying a ping of 1469, but it sees the ping with pkt size specified to 1468.

Any thoughts on this problem that I'm having? Any other data I can provider perhaps?

DF? Size of tagged frames? Recall that "packet size" perhaps not what you think, also.

Have you read the vlan man page, specifically:

     Note: Unless marked as having native support for vlan, the above drivers
     don't inform the vlan driver about their long frame handling capability.
     Just increase the MTU of a vlan interface if it appears to be lower than
     1500 bytes after attaching to a parent known to support long frames.

But you invite speculation -- a raw tcpdump (-nqvv or so) would
be nice.


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