Supplement to OpenWRT wiki and README as of current master HEAD e63a283.

odhcp configuration file is /etc/config/dhcp in UCI format.

Section odhcp options:

maindhcp
- renamed from legacy option
leasefile
leasetrigger

Section dhcp options:

interface
- UCI logical name, not netdev name.
ifname
- netdev name.
- Using this sets "M" flag in Router Advertisement message will be set
networkid
dynamicdhcp
- value "no" disables dynamic assignment, and use only static lease setting of host section
ignore
leasetime
start
limit
master
upstream
- list
ra
dhcpv4
dhcpv6
ndp
router
- list
dns
- list
domain
- list
filter_class
dhcpv6_raw
- additional DHCPv6 options in HEX format
pd_manager
pd_cer
ra_default
- explicitly announce default route (ex. off-link)
- value will be Router Lifetime in Router Advertisement message
ra_management
- defaults to 0
- value non-0 sets "M" flag in Router Advertisement message.
- value "1" sets "A" flag in Prefix Information.
ra_offlink
- value non-0 unsets "L" flag in Prefix Information.
ra_preference
ra_advrouter
- value non-0 sets "R" flag in Prefix Information (RFC3775 mobile IPv6)
ra_maxinterval
ndproxy_routing
ndproxy_slave

Section host options:

ip
mac
duid
hostid
leasetime
name

Hybrid

If the interface was master, then hybrid means relay or disabled. If there was no slave relay in the other interfaces, then it will be configured to disabled.

If the interface was not master, then hybrid means relay or server. If there was no master, then the interface will be configured to server.