no IPv6 on eth0

[tmdag]

Hi, 

I'm slowly trying to get into the world of IPv6 and still learning about it. After googling around i think i found proper settings that give me IPv6 which seems to be working as my machine is getting IPv6 address and according to https://test-ipv6.com/, I'm getting score 10/10.

But what supprises me is that while LAN eth1 has IPv6, my WAN eth0 does not

> show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface    IP Address                        S/L  Description                 
---------    ----------                        ---  -----------                 
eth0         172.218.xxx.xxx/22                 u/u                              
eth1         10.0.1.1/24                       u/u  mynetwork                     
             2001:569:xxxx:xxxx::1/64         

My settings:

 interfaces {
     ethernet eth0 {
         address dhcp
         dhcpv6-pd {
             pd 0 {
                 interface eth1 {
                     host-address ::1
                     prefix-id :1
                     service slaac
                 }
                 prefix-length 56
             }
             rapid-commit enable
         }
         duplex auto
         firewall {
             in {
                 ipv6-name WAN6_IN
                 name WAN_IN
             }
             local {
                 ipv6-name WAN6_LOCAL
                 name WAN_LOCAL
             }
         }
         ipv6 {
             dup-addr-detect-transmits 1
             router-advert {
                 managed-flag true
             }
         }
         speed auto
     }
     ethernet eth1 {
         address 10.0.1.1/24
         description mynetwork
         duplex auto
         ipv6 {
             dup-addr-detect-transmits 1
             router-advert {
                 cur-hop-limit 64
                 link-mtu 0
                 managed-flag false
                 max-interval 600
                 other-config-flag false
                 prefix ::/64 {
                     autonomous-flag true
                     on-link-flag true
                     valid-lifetime 2592000
                 }
                 reachable-time 0
                 retrans-timer 0
                 send-advert true
             }
         }
         speed auto
         vif 10 {
             address 10.0.5.1/24
             description vifnetwork
             mtu 1500
         }
     }

[kpfleming]

Your eth0 interface has a link-local IPv6 address, even though it is not displayed there, and that is sufficient for routing of IPv6 traffic to and from your ISP.

[tmdag]

Yeah, looks like it's sufficient as it works but is that normal ? I've seen other people screenshots and they do have IPv6 next to the WAN and LAN at the same time hence my confusion here.

I have still a lot of reading regarding this topic Thanks!

[kpfleming]

There are many ways to transport IPv6 between routers, and they are all 'normal'. There are advantages and disadvantages to each mode, but they tend to be minor.