Re:Van Jacobson Denies Averting Internet Meltdown in 1980s (...
by cryptonector on Thursday April 26, 2018 @04:38PM
(#16935513)
I wish the ICMP source quench thing had worked out better.
Nowadays it's a struggle even to get Fragmentation Needed but DF Bit Set ICMPs generated. Too many important routers have to interrupt the main CPU to generate these, and either this then defaults to off or the operators turn it off. Fortunately now we have ICMP-less PMTUD, but it's crazy how long it's taken to get that widely adopted.
Nowadays it's a struggle even to get Fragmentation Needed but DF Bit Set ICMPs generated. Too many important routers have to interrupt the main CPU to generate these, and either this then defaults to off or the operators turn it off. Fortunately now we have ICMP-less PMTUD, but it's crazy how long it's taken to get that widely adopted.