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web_gui:dhcp_server [2010/11/08 16:42]
mats
web_gui:dhcp_server [2010/12/14 11:01] (current)
mats
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====== DHCP Server - Advanced ====== ====== DHCP Server - Advanced ======
-DHCP stands for Dynamic Host Configuration Protocol and is a protocol for auto-configuration of IP interfaces. [[wp>DHCP|Learn more about DHCP]]+DHCP stands for Dynamic Host Configuration Protocol and is a protocol for auto-configuration of IP interfaces. 
 + 
 +Read more: [[troubleshooting:dhcp_server_problems|DHCP server problems]] [[wp>DHCP|DHCP]]
==== Fixed addresses ==== ==== Fixed addresses ====
 +{{ :web_gui:dhcp_server.png?329|DHCP Server in rel 5.30}}
 +Here you can specify which IP addresses the DHCP server should give to certain clients. :!: Usually this is not necessary - the DHCP server chooses addresses by itself from the specified address range.
-Here you can specify which IP addresses the DHCP server should give to certain clients. (Usually this is not necessary - the DHCP server chooses addresses by itself from the specified address range.)+**IP Address** the IP address to be given to the client. Must be within the corresponding port's subnet, but does not need to be within the "From/To" range given to the DHCP server (on the [[network_page#DHCP Server|Network page]]).
-**IP Address** the IP address to be given to the client. Must be within the corresponding port's subnet, but does not need to be within the "From/To" range given to the DHCP server. +**MAC address** the unique MAC address of the client to receive the IP address. [[wp>MAC_address|MAC address]]
- +
-**MAC address** the unique MAC address of the client to receive the IP address.+
**Known hosts** list of hosts known by this unit. The list can be used to ease configuration by pressing **Add this host**. (After that the IP address can be changed if desired.) Press "Apply" after you are finished. **Known hosts** list of hosts known by this unit. The list can be used to ease configuration by pressing **Add this host**. (After that the IP address can be changed if desired.) Press "Apply" after you are finished.
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**Normal** If the DHCP client on the LAN doesn't ask for a particular time value, this is the lease time used. **Normal** If the DHCP client on the LAN doesn't ask for a particular time value, this is the lease time used.
 +
**Maximum** If the DHCP client on the LAN asks for longer time than this, this is the lease time used. If a shorter time is requested by the client, it is granted. **Maximum** If the DHCP client on the LAN asks for longer time than this, this is the lease time used. If a shorter time is requested by the client, it is granted.
-NOTE: The DHCP client normally starts refreshing the lease after half the agreed lease time. + 
 +:!: The DHCP client normally starts refreshing the lease after half the agreed lease time.
==== Add DHCP server options ==== ==== Add DHCP server options ====
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**Option** Number according to [[http://tools.ietf.org/html/rfc2132|RFC2132]], along with identification (the ISC DHCP server standard names). **Option** Number according to [[http://tools.ietf.org/html/rfc2132|RFC2132]], along with identification (the ISC DHCP server standard names).
 +
**Data** The data for the option. Typically an IP address in dot notation, a string or a number, depending on the option. Some options (no. 19,20,27,29,30,31,34,36,39) are flags - write "true" or "false" for these. For arrays of values (e.g. "time-servers") use comma as separator. **Data** The data for the option. Typically an IP address in dot notation, a string or a number, depending on the option. Some options (no. 19,20,27,29,30,31,34,36,39) are flags - write "true" or "false" for these. For arrays of values (e.g. "time-servers") use comma as separator.
 +
 +**Allow DHCP client to set option 43** Uncheck this box if the automatic option 43 setting by the DHCP client is not wanted (see below, under [[dhcp_server#DHCP Client|DHCP Client]]).
==== Vendor class ID (option 60) ==== ==== Vendor class ID (option 60) ====
web_gui/dhcp_server.1289230939.txt.gz · Last modified: 2010/11/08 16:42 by mats
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