DHCP options 185

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Mask

Code. 8 bits. Always set to 1.

Length. 8 bits. Always set to 4.

Mask. 32 bits. Subnet mask of the client.

RFCs: [RFC 2132] DHCP Options.

Updated by: RFC 3942.

DHCP option 3: Length: 6+ bytes This option specifies a list of 32 bit IP addresses for routers on the client’s subnet. The routers SHOULD be listed in order of preference.

00 01 02 03 04 05 06 07

08 09 10 11 12 13 14 15

Code

Length

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 IP address

Code. 8 bits. Always set to 3.

Length. 8 bits. 4+ in multiples of 4.

IP address. 32 bits. One or more IPv4 addresses.

RFCs: [RFC 2132] DHCP Options.

Updated by: RFC 3942.

DHCP option 6: 6+ bytes This option specifies a list of DNS servers available to the client. The servers SHOULD be listed in order of preference.

00 01 02 03 04 05 06 07

08 09 10 11 12 13 14 15

Code

Length

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 IP address

Code. 8 bits. Always set to 6.

Length. 8 bits. 4+ in multiples of 4.

IP address. 32 bits. One or more IPv4 addresses.

RFCs: [RFC 2132] DHCP Options.

DHCP option 7: 6+ bytes This option specifies a list of MIT-LCS UDP servers available to the client. The servers SHOULD be listed in order of preference.

00 01 02 03 04 05 06 07

08 09 10 11 12 13 14 15

Code

Length

Nortel Communication Server 1000

WLAN IP Telephony Installation and Commissioning

NN43001-504 01.02 Standard

Release 5.0 15 June 2007

Copyright © 2004-2007, Nortel Networks

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Nortel Networks NN43001-504 manual Dhcp options