UDP Header Information Common UDP WellKnown Server Ports 7 echo 138 netbiosdgm 19 chargen 161 snmp 37 time 162 snmptrap 53 domain 500 isakmp 67 bootps (DHCP) 514 syslog 68 bootpc (DHCP) 5 rip 69 tftp traceroute 137 netbiosns Length (Number of bytes in entire datagram including header;The UDP header itself decides just the protocol port number UDP software determines the checksum at the ultimate destination using the destination IP address obtained from the IP packet header that carried the UDP message If the checksum agrees, it must be true that the packet has reached the intended destination host and the correct protocolThe header also identifies the next layer up protocol The payload is an IP packet Layer 3, the network level Now the central feature of this note the IP header In it are the source and destination adddresses, and then a whole bunch of technical, detailed junk, and a code indicating what's contained in the next protocol layer up (a UDP packet)
Packet Encapsulation Format S7700 V0r019c00 Configuration Guide Vxlan Huawei
