Show dhcp6c status for ISP prefix
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@Gertjan said in Show dhcp6c status for ISP prefix:
Pretty short if you asked me, but the prefix and upper IPv6 address didn't change for me the last 14 months
Do you have the "Do not allow PD/Address release" enabled?
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Noop.
See image posted above.I don't 'need' that I guess, as it is my 'ISP Box' that handles the prefixes, and it it allocate to the same device = pfSense, as it is using the same DUID, the same prefixes over and over.
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@Gertjan said in Show dhcp6c status for ISP prefix:
Noop.
See image posted above.Sorry, missed that.
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@KluthR said in Show dhcp6c status for ISP prefix:
Yes! German Telekom does not assign anything fixed and Iam not sure if they would respect your mentioned setting.
Well, there's one way to find out. Enable it and see what happens.
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How have I to imagine this function? If the PPPoE disconnects for whatever reason, dhcp6c does NOT send a PD release. So after PPPoE reconnect, I get the same prefix? Does my ISP takes note what prefix I had?
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None of use are working for your ISP ^^, and I'm not aware of any FAQs, documentation, but you could find it out.
See my post above : set dhcp6c debugging mode on, and check the logs.
Answer can be found in the logs.
Like : did I get the same prefix ? -
@JKnott said in Show dhcp6c status for ISP prefix:
Well, there's one way to find out. Enable it and see what happens.
For the record: My ISP (German Telekom) does NOT respect the
Do not allow PD/Address release. I enabled it, saved, rebooted pfSense and I got another prefix.If this was the right way to test it.
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Hate to advocate for an ISP, or worse, an unknown ISP, but to their defense : if you (they) use PPPOE, and all traffic - IPv4 and IPv6 goes over this PPPOE Tunnel, and this pppoe tunnel gets shut down before any "hey, please, Do not allow PD/Address release" can get send : it will never reach them.
Also : I can image that ISPs treat "IPV6 addresses" as "IPv4 WAN addresses" : on any connect, you get another one. Many clienst just love that. Others hate it. And for xx ^$ a month you get a semi static IPv4 .... maybe this will also be the case for your IPv6 needs.
AFAIK : this shouldn't be done like that by your (my) ISP : they are breaking some IPv6 RFCs for sure.Actually, me just thinking out-loud here : is pppoe still a thing these days ?
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@Gertjan said in Show dhcp6c status for ISP prefix:
"hey, please, Do not allow PD/Address release" can get send : it will never reach them
Its the other way round: dhcpv6c sends an "Hey, please release PD" when it exits. The mentioned setting is avoiding it, so my ISP does not get any info to release it which should result in a "static" prefix.
@Gertjan said in Show dhcp6c status for ISP prefix:
is pppoe still a thing these days ?
Seems so. (VDSL2).
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@KluthR said in Show dhcp6c status for ISP prefix:
Its the other way round: dhcpv6c sends an "Hey, please release PD" when it exits. The mentioned setting is avoiding it, so my ISP does not get any info to release it which should result in a "static" prefix.
for this - what I meant to say.
The release doesn't get send .... or is discarded by the ISP anyway. -
@KluthR said in Show dhcp6c status for ISP prefix:
If this was the right way to test it.
I suspect it might take another reboot. However, the way I found out about the problem was just disconnecting & reconnecting the Ethernet cable to the cable modem was enough to cause the prefix to change.
