relay: RD relay between master and slave interfaces
a) support for rewriting announced DNS-server addresses in relay mode
-3. DHCPv6-support with 2 modes of operation
- server: minimalistic server mode
+2. DHCPv6-support with 2 modes of operation
+ server: stateless, stateful and PD-server mode
a) stateless and stateful address assignment
b) prefix delegation support
c) dynamic reconfiguration in case prefixes change
relay: mostly standards-compliant DHCPv6-relay
a) support for rewriting announced DNS-server addresses
+3. DHCPv4-support
+ server: stateless and stateful mode
+
4. Proxy for Neighbor Discovery messages (solicitations and advertisments)
a) support for auto-learning routes to the local routing table
b) support for marking interfaces "external" not proxying NDP for them
* To build DEB or RPM packages use: "make package" afterwards.
-** Server Mode **
+** Configuration **
-0. Server mode is used as a minimalistic alternative for full-blown servers
- like radvd or ISC DHCP if simplicity or a small footprint matter.
- Note: The master interface is unused in this mode. It should be set to '.'.
+odhcpd uses a UCI configuration file in /etc/config/dhcp for configuration
+and may also receive information from ubus
-1. If there are non-local addresses assigned to the slave interface when a
- router solicitation is received, said prefixes are announced automatically
- for stateless autoconfiguration and also offered via stateful DHCPv6.
- If all prefixes are bigger than /64 all but the first /64 of these prefixes
- is offered via DHCPv6-PD to downstream routers.
-2. If DNS servers should be announced (DHCPv6 server-mode) then a local DNS-
- proxy (e.g. dnsmasq) needs to be run on the router itself because 6relayd
- will always announce a local address as DNS-server (if not otherwise
- configured).
+Section of type odhcpd
-3. odhcpd is run with the appropriate configuration.
+Option Type Default Description
+legacy bool 0 Enable DHCPv4 if start but
+ no dhcpv4 option set
+leasefile string DHCP/v6 lease/hostfile
+leasetrigger string Lease trigger script
-** Relay Mode **
+Sections of type dhcp (configure DHCP / DHCPv6 / RA / NDP service)
-0. Relay mode is used when a /64-bit IPv6-Prefix should be distributed over
- several links / isolated layer 2 domains (e.g. if no prefix delegation
- is available). In this mode NDP (namely Router Discovery and Neighbor
- Discovery) messages and DHCPv6-messages are proxied. For DHCPv6 also
- server mode can be used instead of relaying if desired.
+Option Type Default Description
+interface string <name of UCI section> logical OpenWrt interface
+ifname string <resolved from logical> physical network interface
+networkid string same as ifname compat. alias for ifname
+ignore bool 0 ignore this interface
+master bool 0 is a master interface
+ for relaying
+
+ra string disabled Router Advert service
+ [disabled|server|relay|hybrid]
+dhcpv6 string disabled DHCPv6 service
+ [disabled|server|relay|hybrid]
+dhcpv4 string disabled DHCPv4 service
+ [disabled|server]
+ndp string disabled Neighbor Discovery Proxy
+ [disabled|relay|hybrid]
+
+dynamicdhcp bool 1 dynamically create leases
+ for DHCPv4 and DHCPv6
+router list <local address> Routers to announce
+ accepts IPv4 only
+dns list <local address> DNS servers to announce
+ accepts IPv4 and IPv6
+domain list <local search domain> Search domains to announce
+
+leasetime string 12h DHCPv4 address leasetime
+start integer 100 DHCPv4 pool start
+limit integer 150 DHCPv4 pool size
+
+ra_default integer 0 Override default route
+ 0: default, 1: ignore no public address, 2: ignore all
+ra_management integer 1 RA management mode
+ 0: no M-Flag but A-Flag, 1: both M and A, 2: M but not A
+ra_offlink bool 0 Announce prefixes off-link
+ra_preference string medium Route(r) preference
+ [medium|high|low]
+ndproxy_routing bool 1 Learn routes from NDP
+ndproxy_slave bool 0 NDProxy external slave
+
+
+Sections of type host (static leases)
+Option Type Default Description
+ip string IP-Address to lease
+mac string MAC-address
+duid string DUID in base16
+hostid string IPv6 host identifier
+name string Hostname
-1. When starting 6relayd it is required that the master interface - where
- IPv6-service is already provided - is configured and usable.
-
-2. If the upstream router doesn't provide or announce a DNS-service that is
- reachable in an at least site-local scope, a local DNS proxy (e.g. dnsmasq)
- needs to be run and configued on the same router where 6relayd is running.
- (This step can most likely be skipped in most environments.)
-
-3. odhcpd is run with the appropriate configuration.
projects / project / odhcpd.git / blobdiff