You want to use residential solutions for businesses that have other demands. That is your biggest fallacy. EV: SOHO and SMB did use cheapest home GWs - it was enough for IPv4, even with ISP redundancy. If you would like to upgrade them to something much more expensive - good luck! I did not investigate specifically Cisco, I am doubt anybody supports MHMP properly, especially for the site that has a few subnets. IPv6 has fundamental problems on the subnet level. -----Original Message----- From: Marco Moock via NANOG <nanog@lists.nanog.org> Sent: Monday, November 10, 2025 12:29 To: nanog@lists.nanog.org Cc: Marco Moock <mm@dorfdsl.de> Subject: Re: [External Sender] RE: my finance department cares deeply about 2%
Am 10.11.2025 um 09:17:13 Uhr schrieb Vasilenko Eduard via NANOG:
But how would you like to handle the situation where your IPv6 prefix is already (dynamically) assigned to the other household? A few seconds after the uplink was down. RIPE claims that it is 37% of cases worldwide. How to explain to the host that the particular IPv6 prefix should be immediately depicted? (after the event that it has not seen) Especially in the situation when your site has a few subnets (the host is in a different subnet from the Internet gateway).
Routers can invalidate RAs, my Cisco does when I reboot it. The clients will then remove those addresses and routes from the interface.
It is not just "the old session failed"; the new session would use IPv6, which is no longer leased to this household. It is too late to do anything on the router; the host would insert the wrong source IPv6 address.
The ISP blocks that in this case if it only allows the assigned source addresses, which is a good thing to avoid IP spoofing.
I would agree that MHMP is not for residential users. It is for 30M of businesses worldwide. It is possible to push residential to IPv6, and they would not be aware of it (by the way, it is a success).
You want to use residential solutions for businesses that have other demands. That is your biggest fallacy.
Businesses do not want dynamically changing prefixes. There is no reason for ISPs not to provide static prefixes.
It get one from my ISP - and I am a residual customer.
-- Gruß Marco
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