Good morning (o;
Received a new cable modem this morning as the old one was flapping constantly on the LAN side…
Now after installation and provisioning from ISP IPv4 is fine as before..but I don’t see any IPv6 PD anymore…
though ISP support told me on the phone that v6 is setup…
So how can I verify on my little Mikrotik router that I receive or don’t receive any v6 prefix delegation?
I haven’t changed the routers configuration…
thanks in advance
richard
Running /tool sniffer quick mac-protocol=ipv6 ip-protocol=udp port=546 should show you some activity; if you set /tool sniffer set file-name=dhcpv6.pcap before, the packet exchange will be stored into the file, and you’ll be able to open it using Wireshark and see the conversation in a geek-readable form.
Ah great…thanks 
Hmm..doesn’t seems like it gets anything from ISP on ether1:
[admin@gw] > /tool sniffer quick mac-protocol=ipv6 ip-protocol=udp port=546
INTERFACE TIME NUM DI SRC-MAC DST-MAC VLAN SRC-ADDRESS
ether2 16.173 1 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
bridge 16.173 2 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
ether2 132.841 3 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
bridge 132.841 4 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
ether2 247.604 5 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
bridge 247.604 6 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
ether2 377.278 7 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
bridge 377.278 8 <- E8:E8:B7:20:8F:29 33:33:00:01:00:02 fe80::eae8:b7ff:fe20:8f29:546
At first place it doesn’t ask for anything at ether1… PD is not like RA, your router has to ask in order to get some response (remember the guy praying to win in a lottery for decades)?
Just got a phone call from 2nd level support…
Somehow during migration of two different ISPs into one IPv6 isn’t working anymore…
Case closed (o;