[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
PMTUD for IPv4 Multicast - How?
- Subject: PMTUD for IPv4 Multicast - How?
- From: mohta at necom830.hpcl.titech.ac.jp (Masataka Ohta)
- Date: Tue, 01 Sep 2015 09:55:06 +0900
- In-reply-to: <CAAG5dDDv7k7L4JvmL_Zvd7jMD3T8AGERRE5V=mFJ7ySKh9S+6A@mail.gmail.com>
- References: <CAAG5dDCZdbYwnoQUuoaxSdevDTAkwyYGtpNfnVWUWWSZzGPMOg@mail.gmail.com> <[email protected]> <CAAG5dDD+oNOEK0b57j8EnVNrZ09oEHzFy9ruATyAzfeDs=furw@mail.gmail.com> <[email protected]> <CAAG5dDDv7k7L4JvmL_Zvd7jMD3T8AGERRE5V=mFJ7ySKh9S+6A@mail.gmail.com>
Chris Marget wrote:
>>> I'll probably come around, but I've not yet concluded that "screw it,
>>> fragment my traffic, I don't care" is the stance that a conscientious
>>> application should be taking.
>>
>> Don't you care, for routers, generating ICMP PTB is as burdensome
>> as generating fragments?
>
> I don't think so. If PMTUD is working (big IF, I know),
Yup.
> the ICMP PTB
> generation is a one-time thing (or once per 10 minutes or whatever)
A meaningful interval of retry is not 10 minutes but RTT measured
at layer 4 or above.
> Is the concern that I might DDoS myself
Or, with spoofed source addresses, someone else.
Masataka Ohta