IPv4 next-hops over IPv6

Jay Hanke jayhanke at southfront.io
Tue Apr 23 15:28:15 CEST 2024


>
> I haven't, but I cannot begin to fathom how that could possibly work.
>

https://www.ietf.org/archive/id/draft-chroboczek-int-v4-via-v6-01.html


> How can the receiving router possibly resolve an IPv4 next-hop address
> to an destination Ethernet MAC address, if the interface facing the IX
> does not have any IPv4 addresses assigned?
>

A router only needs to know the l2 address to forward a frame. So there
would be no ipv4 address on the transitory network just an ipv6 that
resolves to a Mac address.

Kind of like ipv4 unnumbered but with ipv6 addresses on the segment.
Multiprotocol bgp would be used for the next hops.

>
>
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