How to configure SLAAC + DHCPv6 for hybrid ipv6?

Installing and Using OpenWrt
1

I dug through old forum posts, but the luci interface has significantly changed to the latest version and cant find "hybrid" mode on the current version. I enabled SLAAC in luci but it is not working for me. Anything wrong with my config?

root@OpenWrt:~# ubus call system board
{
        "kernel": "6.6.73",
        "hostname": "OpenWrt",
        "system": "ARMv8 Processor rev 4",
        "model": "Linksys E8450 (UBI)",
        "board_name": "linksys,e8450-ubi",
        "rootfs_type": "squashfs",
        "release": {
                "distribution": "OpenWrt",
                "version": "24.10.0",
                "revision": "r28427-6df0e3d02a",
                "target": "mediatek/mt7622",
                "description": "OpenWrt 24.10.0 r28427-6df0e3d02a",
                "builddate": "1738624177"
        }
}
root@OpenWrt:~#

Network


config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option packet_steering '1'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'lan1'
	list ports 'lan2'
	list ports 'lan3'
	list ports 'lan4'

config interface 'lan'
	option proto 'static'
	option netmask '255.255.255.0'
	option ipaddr '192.168.86.1'
	option device 'br-lan.99'
	option ip6assign '64'
	option defaultroute '0'
	option delegate '0'
	option ip6hint '5'
	option ip6ifaceid '::99'

config interface 'wan'
	option device 'wan'
	option proto 'pppoe'
	option password '*********'
	option delegate '0'
	option username '************'
	option ipv6 '1'
	option peerdns '0'
	list dns '194.242.2.4'
	list dns_search 'base.dns.mullvad.net'

config interface 'guest'
	option proto 'static'
	option ipaddr '192.168.87.1'
	option netmask '255.255.255.0'
	option device 'br-lan.4'
	option ip6ifaceid '::99'
	option delegate '0'

config bridge-vlan
	option device 'br-lan'
	option vlan '4'
	list ports 'lan4:t'

config bridge-vlan
	option device 'br-lan'
	option vlan '99'
	list ports 'lan2:u*'
	list ports 'lan3:u*'
	list ports 'lan4:t'

config interface 'wan6'
	option proto 'dhcpv6'
	option device '@wan'
	option reqaddress 'try'
	option reqprefix 'auto'

DHCP


config dnsmasq
	option domainneeded '1'
	option localise_queries '1'
	option rebind_protection '1'
	option rebind_localhost '1'
	option local '/lan/'
	option domain 'lan'
	option expandhosts '1'
	option authoritative '1'
	option readethers '1'
	option leasefile '/tmp/dhcp.leases'
	option localservice '1'
	option ednspacket_max '1232'
	list rebind_domain 'plex.direct'
	list server '127.0.0.1#5053'
	option doh_backup_noresolv '-1'
	option noresolv '1'
	list doh_backup_server '127.0.0.1#5053'
	list doh_server '127.0.0.1#5053'

config dhcp 'lan'
	option interface 'lan'
	option leasetime '12h'
	option dhcpv4 'server'
	option start '20'
	option limit '230'
	option ra 'server'
	list ra_flags 'managed-config'
	list ra_flags 'other-config'
	option dhcpv6 'server'

config dhcp 'wan'
	option interface 'wan'
	option ignore '1'

config odhcpd 'odhcpd'
	option maindhcp '0'
	option leasefile '/tmp/hosts/odhcpd'
	option leasetrigger '/usr/sbin/odhcpd-update'
	option loglevel '4'

config host
	option name 'marcus-intel'
	option dns '1'
	option mac '00:1C:C0:7C:16:A0'
	option ip '192.168.86.53'
	option leasetime 'infinite'
	option duid '00020000ab1104021a920fa1899a'
	option hostid '53'

config host
	option name 'raspberrypi'
	option dns '1'
	option ip '192.168.86.196'
	option leasetime 'infinite'
	option mac 'DC:A6:32:D2:2A:77'
	option duid '00020000ab11d42562ceaa15eb17'
	option hostid '58'

config dhcp 'guest'
	option interface 'guest'
	option start '100'
	option limit '150'
	option leasetime '12h'

config domain
	option name 'Dad-AndroidOne'
	option ip '192.168.86.146'

config domain
	option name 'E8450Hall'
	option ip '192.168.86.245'
2

@lleachii @egc A little help here, please?

3

The "hybrid" option was just an attempt to auto select server or relay mode based on whether the ISP provides a routed prefix. The default setting of both RA and DHCP as "server" will allow LAN endpoints to use either or both methods.

1 Like
4

If you want SLAAC and DHCPv6 config then your setup looks OK, see:

I have the same and my clients make a SLAAC IPv6 address and the ones I set a static lease in dhcp alsocreat the static lease.
Note not all clients can deal with a static lease some are SLAAC only (e.g Android).

If you need the DUID of the client then it can be seen on the Status page under Active DHCPv6 leases

5

So all SLAAC compatible entities like dockers which I am trying to get the ipv6 of will show under Active DHCPv6 leases in the homepage ?

And ideally, I should see the ipv6 of my phone under Active DHCPv6 leases too which is a pixel 8 pro because I have enabled SLAAC right? But I don't see it

What could be wrong, or where can I see SLAAC ipv6 in openwrt luci?

6

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Marcus is my server, Maze is my laptop and no P8P android phone or other phones in the lan. I even restarted the router.

7

No. You'll see devices that have requested an address via DHCPv6. Android devices don't support DHCPv6 and only use SLAAC.

1 Like
8

Where can I see SLAAC ipv6 in openwrt luci?

9

There's a list of 'IPv6 Neighbours' with associated MAC addresses under Status > Routing. You can use that to figure out what address a device has at that specific point in time.

3 Likes
10

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