PMTUD for IPv4 Multicast - How?
Masataka Ohta
mohta at necom830.hpcl.titech.ac.jp
Tue Sep 1 01:21:23 UTC 2015
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
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