[Netkit.users] Issue with vlan/mtu
ZioPRoTo (Saverio Proto)
zioproto a gmail.com
Ven 23 Nov 2007 00:10:57 CET
Hold on, you mean that the Linux box is VLAN unaware, and the the IP
packet transits towards a VLAN aware segment ??
In this case OF COURSE the first switch at the edge of the VLAN aware
segment of the Network will fragment the packet if HIS MTU is not
bigger than 1500. This is the normal behaviour as far as I know.
The REAL solution is having a MTU of at least 1504 bytes in the VLAN
There is not ICMP message for indicating that IP packets are being
fragmented. The only case is when the Dont' Fragment bit is set, and
packet is dropped, in that case you get back an ICMP
Have a look here.
my 2 cents
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