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davorin
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How to check if ISP does IPv6 PD?

Thu Jun 09, 2022 12:06 pm

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
 
sindy
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Re: How to check if ISP does IPv6 PD?

Thu Jun 09, 2022 12:41 pm

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.
 
davorin
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Re: How to check if ISP does IPv6 PD?

Thu Jun 09, 2022 12:51 pm

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      
 
sindy
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Re: How to check if ISP does IPv6 PD?

Thu Jun 09, 2022 12:54 pm

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)?
 
davorin
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Re: How to check if ISP does IPv6 PD?

Thu Jun 09, 2022 1:04 pm

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;

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