config dhcrelay ipv4 option 'enabled' '0' # IP address of the server option 'dhcpserver' '192.0.2.10' # network interfaces to listen on (e.g. lan or wan) option 'interfaces' '' # What to do about packets that already have a relay option: # 'append': Forward and append our own relay option # 'replace': Forward, but replace theirs with ours (default) # 'forward': Forward without changes # 'discard': Don't forward option 'relay_mode' '' # enable RFC3527 link selection sub-option and use the IP address of # the specified network interface as "uplink" IP address (e.g. wan) option 'link_selection' '' config dhcrelay ipv6 # option dhcpserver '2001:db8:1::1' option upper 'eth1' list lower 'eth0.2' list lower 'eth0.3'