Assertion: df bit | /r/HasProperty | set
Facets:
Source sentences:
text: Should any of the packets need to be fragmented as they travel along the path to the destination they are discarded by the router involved as the DF bit is set.
text: The DF bit is set to disable the fragmentation and in this case, if the packet size is greater than MTU value then it is dropped.
text: When the DF bit is set and the packet must be fragmented in order to be forwarded, then the firewall drops the packet and sends an ICMP Type3 Code4 to the sender.
text: For IPv4, packets for which the DF bit is not set can be fragmented before encapsulation (and the encapsulating header would have the DF bit set); packets whose DF bit is set would need to get the DF bit cleared (though this is non-compliant).
text: This error (type 3 (destination unreachable), code 4 (fragmentation needed but don't-fragment bit set)) is returned by a router when it receives a packet that is too large for it to forward and the DF bit is set.
text: Note that this error is only sent if the DF bit is set; otherwise, packets are just fragmented and passed through.