![]() If the aggregating switch builds a packet of 1500 bytes and the transmission path has another switch which only allows a maximum of 1492 bytes the packet will be lost en route, as it will not be able to pass the restriction. The lowest MTU (maximum transmission unit) seen on a path will be the restriction. ![]() ![]() Multiple small TCP packets may be aggregated by a switch to optimize transmission speed and latency. This allows you to test the maximum packet size you can send between 2 devices. The -f attribute sets a Don't Fragment (DF) flag in the packet (IPv4-only) which keeps the packet size intact. The ping command supports a length ( -l, lowercase L) attribute which allows you to define the ping packet size.
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