31 Aug
2015
31 Aug
'15
9:21 p.m.
Mark Andrews wrote:
Yes, it is. Generating an ICMP PTB is as burdensome as fragmenting a packet.
Well it could be done at wire speed.
Both of them could be.
There is no theoretical reason why it has to be more burdensome than forwarding a packet.
That's not my point.
The communiction fails.
It depends on layer 4 and above.
Additionally routers normally rate limit PTB generation thereby reducing cpu loads to a acceptable level which is the whole point of moving the fragmentation to the originating node.
Routers can rate limit fragment generation, too. Masataka Ohta