DHCP v6

[binojbaby1984]

i have a small doubt regarding dhcp v6 and v4 . why clients requesting for a ip from dhcpv6 server always uses a fixed port( 546 in case of v6 and 68 incase of v4) . Generally for all other traffic such as http request from client the source port will be random. Can you please explain the reason or provide any link

[Harold Ritter]

Hi,

The reason dhcpv6 uses a specific client port is that it is specificly defined in RFC3315 section 5.2. Same applies to DHCP (RFC 1531 section 4.1).

http://www.ietf.org/rfc/rfc3315.txt

http://tools.ietf.org/html/rfc1531

Hope this helps