singtel ipv6 down?

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fromnuaa

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my singtel 6rd ipv6 is not working this morning.

who has same problem please share here.
 
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xiaofan

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fromnuaa said:
my singtel 6rd ipv6 is not working this morning.

who has same problem please share here.
Click to expand...

No issue here with Singtel 6rd with a virtual OpenWRT router.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sh-in-f113.1e100.net (2404:6800:4003:c1c::71)) 56 data bytes
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=1 ttl=109 time=4.19 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=2 ttl=109 time=4.04 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=3 ttl=109 time=3.87 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=4 ttl=109 time=4.14 ms

--- ipv6.google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 3.873/4.059/4.186/0.119 ms

root@OpenWrt:~# cat /etc/config/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 ula_prefix 'dda5:edda:cf50::/48'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.38.1'
        option netmask '255.255.255.0'
        option delegate '0'
        option ip6assign '64'
        list ip6class 'wan6'

config interface 'wan'
        option device 'eth0'
        option proto 'dhcp'

config interface 'wan6'
        option proto '6rd'
        option peeraddr '202.166.127.6'
        option ip6prefix '2400:d803::'
        option ip6prefixlen '32'
 
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fromnuaa

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After rebooting router, ipv6 has internet connection now.


xiaofan said:
No issue here with Singtel 6rd with a virtual OpenWRT router.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sh-in-f113.1e100.net (2404:6800:4003:c1c::71)) 56 data bytes
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=1 ttl=109 time=4.19 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=2 ttl=109 time=4.04 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=3 ttl=109 time=3.87 ms
64 bytes from sh-in-f113.1e100.net (2404:6800:4003:c1c::71): icmp_seq=4 ttl=109 time=4.14 ms

--- ipv6.google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3004ms
rtt min/avg/max/mdev = 3.873/4.059/4.186/0.119 ms

root@OpenWrt:~# cat /etc/config/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 ula_prefix 'dda5:edda:cf50::/48'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.38.1'
        option netmask '255.255.255.0'
        option delegate '0'
        option ip6assign '64'
        list ip6class 'wan6'

config interface 'wan'
        option device 'eth0'
        option proto 'dhcp'

config interface 'wan6'
        option proto '6rd'
        option peeraddr '202.166.127.6'
        option ip6prefix '2400:d803::'
        option ip6prefixlen '32'
Click to expand...
 
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fromnuaa

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My singtel 6rd ipv6 doesn't work again now:

Connection
IPv4 Connectivity: Internet
IPv6 Connectivity: No Internet access
Media State: Enabled
Duration:02:46:18
Speed:1.0 Gbps

Network Connection Details:
DHCP Enabled Yes
IPv4 Address 192.168.1.134
IPv4 Subnet Mask 255.255.255.0
Lease Obtained Sunday. January 26, 2025 10:03:54
Lease ExpiresMonday. January 27, 2025 10:03:53
IPv4 Default Gateway 192.168.1.254
IPv4 DHCP Server 192.168.1.254
IPv4 DNS Server 192.168.1.254
IPv4 WINS Server
NetBIOS over Tcpip En..Yes
IPv6 Address 2400:d803:7907:3957:4f80:e135:7e6
Temporary IPv6 Address 2400:d803:7907:3957:18be:15f:496a
Linklocal IPv6 Address fe80:fb8d:509f:5:6053.9
IPv6 Default Gateway fe80:5aef:68fffec0:e78%.9
IPv6 DNS Servers 2400:d803:7907:3957:5aef:68ffecO:
2400:d803:7907:3957:5aef:68ffec0:
 
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xiaofan

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fromnuaa said:
My singtel 6rd ipv6 doesn't work again now:
Click to expand...

Hmm, this time I can reproduce your issue.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sd-in-f138.1e100.net (2404:6800:4003:c0f::8a)) 56 data bytes

--- ipv6.google.com ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3142ms

Edit to add --> reboot the virtual OpenWRT and it works again.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sb-in-x71.1e100.net (2404:6800:4003:c01::71)) 56 data bytes
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=1 ttl=108 time=4.20 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=2 ttl=108 time=4.09 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=3 ttl=108 time=3.74 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=4 ttl=108 time=3.94 ms

--- ipv6.google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 3.737/3.991/4.200/0.173 ms
 
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fromnuaa

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rebooting router is not good solution..

Is native ipv6 always working?


xiaofan said:
Hmm, this time I can reproduce your issue.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sd-in-f138.1e100.net (2404:6800:4003:c0f::8a)) 56 data bytes

--- ipv6.google.com ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3142ms

Edit to add --> reboot the virtual OpenWRT and it works again.

Bash: 
root@OpenWrt:~# ping -c 4 ipv6.google.com
PING ipv6.google.com(sb-in-x71.1e100.net (2404:6800:4003:c01::71)) 56 data bytes
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=1 ttl=108 time=4.20 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=2 ttl=108 time=4.09 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=3 ttl=108 time=3.74 ms
64 bytes from sb-in-f113.1e100.net (2404:6800:4003:c01::71): icmp_seq=4 ttl=108 time=3.94 ms

--- ipv6.google.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 3.737/3.991/4.200/0.173 ms
Click to expand...
 
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xiaofan

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fromnuaa said:
rebooting router is not good solution..

Is native ipv6 always working?
Click to expand...

Yes, Singtel native IPv6 is always working in my case. I am using XGS-PON ONR so I had to request through Singtel to enable native IPv6. But as per the reports, Singtel may have not finished the deployment yet (strange that it takes so long as I got native IPv6 working with my ONT connection back in Nov 2023).

You should really try native IPv6 if it is available in your area, it is way better than 6rd.
 
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fromnuaa

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I am still waiting for singtel 5Gbps subscription applying result.

If got approved and changed to ONR, i will try native IPv6.


xiaofan said:
Yes, Singtel native IPv6 is always working in my case. I am using XGS-PON ONR so I had to request through Singtel to enable native IPv6. But as per the reports, Singtel may have not finished the deployment yet (strange that it takes so long as I got native IPv6 working with my ONT connection back in Nov 2023).

You should really try native IPv6 if it is available in your area, it is way better than 6rd.
Click to expand...
 
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duno why but for quite some time my native ipv6 also not getting ip. went in the singtel router the ipv6 setting is enabled though..
 
BBCWatcher

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fromnuaa said:
rebooting router is not good solution..
Is native ipv6 always working?
Click to expand...
xiaofan said:
You should really try native IPv6 if it is available in your area, it is way better than 6rd.
Click to expand...
nothinghere said:
My 6rd also not working, disabled it on boot.
Click to expand...
The reboot is doing something to restore service over the 6rd connection. If you can figure out what that something is then you can do just that, without a reboot. Probably with an automated script of some kind.

In addition to native IPv6 (if available) Hurricane Electric's Tunnel Broker is an option. You can even "dual path" Singtel 6rd and HE Tunnel Broker so that if one IPv6 path is down the other will be used, and vice versa. Just be aware that streaming services such as Netflix may geoblock IPv6 traffic that Hurricane Electric routes.
 
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If ONT and router reboot at same time, 6rd IPv6 will not work.
If ONT reboots first, router reboots 5 mins later, 6rd IPv6 will work properly.

This problem never occurs before.

Now I am using single timer power socket for both ONT and router auto-rebooting so I can see this problem.

I will use different timer power sockets for ONT and router auto-rebooting.

BBCWatcher said:
The reboot is doing something to restore service over the 6rd connection. If you can figure out what that something is then you can do just that, without a reboot. Probably with an automated script of some kind.

In addition to native IPv6 (if available) Hurricane Electric's Tunnel Broker is an option. You can even "dual path" Singtel 6rd and HE Tunnel Broker so that if one IPv6 path is down the other will be used, and vice versa. Just be aware that streaming services such as Netflix may geoblock IPv6 traffic that Hurricane Electric routes.
Click to expand...
 
BBCWatcher

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fromnuaa said:
If ONT and router reboot at same time, 6rd IPv6 will not work.
If ONT reboots first, router reboots 5 mins later, 6rd IPv6 will work properly.
This problem never occurs before.
Now I am using single timer power socket for both ONT and router auto-rebooting so I can see this problem.
I will use different timer power sockets for ONT and router auto-rebooting.
Click to expand...
You could do that. Another potentially simpler option is to insert a delay early in your router's boot process. Typically that's a matter of changing a parameter/configuration setting.

But really it's best to figure out why your router isn't able to provide service, or to reestablish service, whenever the ONT is ready. It's best if your router is more robust, if you can figure out the root cause.
 
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fromnuaa

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Now I change back to Singtel Mesh Router.

The strange thing is:
When I set ipv6 as 6RD, router can't get ipv6 address;
When I set ipv6 as Dual Stack, it can get native ipv6 address:

Internet
Status: Connected
IPv4 Address: 42.60.134.xx
IPv6 Address: 2400:d802:321a:f24e::41

But ipv6 has no internet access.

Then I call 1688 and they say that they need 2-4 days to do ipv6 troubleshooting.
 
Last edited:
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fromnuaa said:
Now I change back to Singtel Mesh Router.

The strange thing is:
When I set ipv6 as 6RD, router can't ipv6 address;
When I set ipv6 as Dual Stack, it can get native ipv6 address:

Internet
Status: Connected
IPv4 Address: 42.60.134.xx
IPv6 Address: 2400:d802:321a:f24e::41

But ipv6 has no internet access.

Then I call 1688 and they say that they need 2-4 days to do ipv6 troubleshooting.
Click to expand...
It's not the router that needs an address, it needs a prefix delegation that you can apply to your inside interfaces.
The router technically does not need a WAN address in a native setup (it can use the link-local), and the WAN address (if assigned) does not need to be routable.

What matters if that the router receives a prefix delegation (singtel give you a /56 on native), and then the router needs to split off a /64 from that /56 for each VLAN you want to create.

Check your prefix delegation settings.
 
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When I set 6RD ipv6 in router, I'm using default setting:
IPv6 Protocol IPv6 - 6rd
6rd Tunnel Type Manual Configuration
Prefix 2400: D803
Prefix Length 32
Border Relay 6rd.singnet.com.sg
IPv4 Address Mask 0

client PC can get 6rd ipv6 address as below, but it doesn't have internet access:
IPv6 Address 2400:d803:2a3c:8684:359a:bd22:d7b
Temporary IPv6 Address 2400:d803:2a3c:8684:59fef186f740
Link-ocal IPv6 Address fe80:fb8d:509f:5:6053%.9
IPv6 Default Gateway fe80:aaa2:37ffe35:ce94%9
IPv6 DNS Servers 2400:d800::1
2400:d800::2

bert64 said:
It's not the router that needs an address, it needs a prefix delegation that you can apply to your inside interfaces.
The router technically does not need a WAN address in a native setup (it can use the link-local), and the WAN address (if assigned) does not need to be routable.

What matters if that the router receives a prefix delegation (singtel give you a /56 on native), and then the router needs to split off a /64 from that /56 for each VLAN you want to create.

Check your prefix delegation settings.
Click to expand...
 
Last edited:
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fromnuaa said:
When I set 6RD ipv6 in router, I'm using default setting:
IPv6 Protocol IPv6 - 6rd
6rd Tunnel Type Manual Configuration
Prefix 2400: D803
Prefix Length 32
Border Relay 6rd.singnet.com.sg
IPv4 Address Mask 0

client PC can get 6rd ipv6 address as below, but it doesn't have internet access:
IPv6 Address 2400:d803:2a3c:8684:359a:bd22:d7b
Temporary IPv6 Address 2400:d803:2a3c:8684:59fef186f740
Link-ocal IPv6 Address fe80:fb8d:509f:5:6053%.9
IPv6 Default Gateway fe80:aaa2:37ffe35:ce94%9
IPv6 DNS Servers 2400:d800::1
2400:d800::2
Click to expand...
6rd works differently...
The LAN address space is automatically calculated based on the legacy address of the router.
If the 6rd prefix is 2400:d803::/32 then the next two blocks of the address will be the legacy WAN address of the router encoded in hex, eg 2a3c:8684 -> 42.60.134.132...
The router does all this on its own irrespective of the presence of a working 6rd tunnel server, eg if you change the 6rd prefix to 2001:db8::/32 you will get 2001:db8:2a3c:8684::/64 but it won't be able to route anywhere.

So even if there is no tunnel server or the tunnel server is broken 6rd will still calculate your LAN address space and assign addresses, they just won't route anywhere - which seems to be what you're seeing. It looks like there's a problem with the tunnel server.

For native the router needs to send a DHCPv6 PD request to a server at the ISP, and receive back a routable prefix. If this is not correctly configured or does not respond then it won't get a prefix and thus won't be able to assign any addresses to its LAN interface or to any clients.

Using native will always work better than a tunnel, your best bet is to focus on configuring that. The fact that native assigned you a WAN address for the router suggests that it's been deployed in your area, so the bit you're missing is getting a prefix that you can assign to LAN.
 
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