Timeline for What is the purpose of using a large ping packet?
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
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| Jul 21, 2023 at 13:21 | comment | added | W.M. | @ratchetfreak I am testing two ISP's. The first ISP outperforms the second (i.e. lower latency times) at low packet size (32 bytes) and the second ISP outperforms the first (with lower latency times) at high packet size (32kb), which ISP should I choose? | |
| Jul 26, 2014 at 11:09 | audit | First posts | |||
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| Jul 24, 2014 at 5:54 | audit | First posts | |||
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| Jul 4, 2014 at 7:14 | audit | First posts | |||
| Jul 4, 2014 at 7:15 | |||||
| Jul 4, 2014 at 0:12 | comment | added | kasperd | @MaQleod It is quite clearly stated in the standards, that the decision about whether to fragment packets that were too large, is not to be made by routers. In IPv4 the sender decides if the packet is to be fragmented or if an error is to be returned to the sender. In IPv6 a router never fragments a packet, an error is always sent to the sender if a packet is too large. | |
| Jul 4, 2014 at 0:01 | comment | added | LawrenceC | PPPoE (used often with DSL) adds an 8 byte header, so the MTU for PPPoE connections is typically 1492. | |
| Jul 3, 2014 at 12:34 | comment | added | Juha Untinen | Some 10 years ago, I had to debug the default MTU of Windows, because the connection never worked to specific places. This was detectable by changing the ping packet size from the default value to bigger ones. Afaik 1500 was too much, and 1400 allowed normal operation (ADSL in Finland). | |
| Jul 2, 2014 at 20:05 | comment | added | ratchet freak | @MaQleod or it checks the fragmentation needed flag in the reply. | |
| Jul 2, 2014 at 18:41 | comment | added | MaQleod | Using a jumbo frame doesn't adequately validate that a jumbo frame will work. Most routers will simply fragment a larger frame if its MTU is lower (though some routers have options to discard in this instance). A ping using the don't fragment flag is more appropriate as it covers ALL instances where there is an interface with a smaller MTU than the packet sent. | |
| Jul 2, 2014 at 15:40 | vote | accept | injector | ||
| Jul 2, 2014 at 15:01 | history | answered | ratchet freak | CC BY-SA 3.0 |