Am 05.11.2025 um 11:00:13 Uhr schrieb Vasilenko Eduard via NANOG:
Multi-prefix, SP address delegation through the site, absence of NAT.
If you want NAT really hard, you can use it with IPv6 too. fd00::/8 exist.
Many things. Try to organize the primary and redundant connection to the SP (that is needed for every business).
A connection with 2 prefixes (or even 2 IPv4 addresses) via 2 ISPs is never redundant, unless you set it up this way with both ISPs cooperating. If you really want redundancy, you have to get your own ASN and route it via 2 independent ISPs. Or let 2 ISPs route your network ranges. In all other cases with NAT and 2 IPv4 addresses, connections will be lost when one of the connections fail, as the remote system won't accept the packages from a different address unless a new connection is being established.
The fact that every subnet is /64 is convenient. Just if has a payment 16/750=2% of the overall Internet capacity (750B is the average packet size). The decision to violate OSI model and put MAC address inside IP address was very questionable.
Are you aware that EUI64 is only one way to generate the addresses and that the 64 bits can be randomly filled or be static? -- Gruß Marco Send unsolicited bulk mail to 1762336813muell@cartoonies.org