Avaya Communication Server 1000 Installation And Commissioning Manual page 222

Troubleshooting WLAN IP Telephony installations
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
Code
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
Code
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
Code
Code. 8 bits. Always set to 7.
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 15: 3+ bytes This option specifies the domain name that client should use
when resolving hostnames via DNS.
00 01 02 03 04 05 06 07
Code
Code. 8 bits. Always set to 15.
Length. 8 bits. 1+.
Domain name. Variable length.
RFCs: [RFC 2132] DHCP Options
222 Avaya WLAN IP Telephony Installation and Commissioning
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Length
08 09 10 11 12 13 14 15
Length
08 09 10 11 12 13 14 15
Length
08 09 10 11 12 13 14 15
Length
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25 26 27 28 29 30 31 IP
address
16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 IP
address
16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 IP
address
16 17 18 19 20 21 22 23 24
25 26 27 28 29 30 31 Domain
name
November 2010