sengberg@carroll1.cc.edu (Scott L Engberg) (10/10/90)
Does anybody know what the packet size is that a IICi running AUX sends over ethernet? Scott sengberg@carroll1.cc.edu
mikel@dtg.nsc.com (Michael G. Lohmeyer) (10/10/90)
In article <2074@carroll1.cc.edu> sengberg@carroll1.cc.edu (Scott L Engberg) writes: >Does anybody know what the packet size is that a IICi running AUX >sends over ethernet? The standard packet size for IEEE 802.3 (Ethernet) is a maximum of 1518 bytes and a minimum of 64 bytes. The packet consists of 6 bytes for the destination address (the physical Ethernet address, not a TCP/IP address), the source address, a byte count for the packet, a minimum of 48 bytes of data, a 4 byte CRC, and maybe something else that I can't exactly remember off hand right now. This is, of course, just the IEEE 802.3 spec. When you go to TCP/IP, the format is contained within the data section of the IEEE 802.3 packet, so that means that no matter what machine you are using, or what upper level protocol you are using (TCP/IP, IPX, etc.), the maximum packet size for Ethernet is 1518 bytes. I assume that TCP/IP (which A/UX uses for Ethernet) takes advantage of the full packet size. Does that tell you what you wanted to know? Mike ------------- Mike Lohmeyer mikel@dtg.nsc.com National Semiconductor Corporation ...!dtg.nsc.com!mikel (408) 721-8075