How can I configure my DHCP server to distribute IP routes?

blerontin 2014-10-30 21:29:24

This can be done by adding the following lines to dhcpd.conf:

option rfc3442-classless-static-routes code 121 = array of integer 8;
option rfc3442-classless-static-routes 24, 192, 168, 1, 192, 168, 0, 4;
option ms-classless-static-routes code 249 = array of integer 8;
option ms-classless-static-routes 24, 192, 168, 1, 192, 168, 0, 4;

This distributes a route entry for network 192.168.1.0/24 using the gateway 192.168.0.4.

The meaning of the bytes is (in brackets the value from the example above):

WW, D1, D2, D3, R1, R2, R3, R4
WW      = destination network mask width (24)
D1..D3  = destination network address (192.168.1.*)
R1..R4  = router address (192.168.0.4)

Note: The number of D1..DN bytes varies depending on the network mask. See RFC3442 for details.

nhed 1970-01-01 08:00:00

confused - pretty sure that the OP specifies dnsmasq as the server

Benedikt Köppel 1970-01-01 08:00:00

pretty extensive explanation on how it works: serverfault.com/a/575936/155358

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