Hi Aham, what I do is I add multiple loopback interfaces (it is useful in an ISP context so that when I add a loopback interface to ospf (to advertise the address as an intra area route ) (but I don't want to advertise the standard loopback addresses 127.0.0.1)
eg echo inet a.b.c.d/32 >/etc/hostname.lo2 echo inet alias w.x.y.z/32 >>/etc/hostname.lo2 and just keep adding additional addresses using "inet alias" Hope this helps On Thu, 23 Jan 2020 at 11:04, Aham Brahmasmi <[email protected]> wrote: > Namaste misc, > > In IPv6, what address prefix/range is recommended for use when > assigning multiple addresses to the loopback interface? > > The use case is running multiple servers (nsd and unbound) on the same > port but different loopback addresses. It is similar to what popped up > on the other thread about dig. > > If I am not wrong, 127.0.0.1/8 is the loopback range in IPv4. On the > other hand, in IPv6, there is only one loopback address - ::1/128 [1]. > > And because there is only one loopback address, I do not know whether: > 1) ::2/128, ::3/128 et al are RFC compliant IPv6 loopback addresses. > 2) the very idea of running multiple servers on the same port but > different loopback addresses is redundant in IPv6. > > Searching the internet throws up different mechanisms, but no definitive > solution. In fact, someone went throught the entire trouble of writing > up a draft RFC [3] to assign an address range. But for reasons that I do > not know, the draft was allowed to expire. > > Dhanyavaad, > ab > [1] - https://www.iana.org/assignments/ipv6-address-space/ > [2] - https://www.iana.org/assignments/ipv6-multicast-addresses/ > [3] - > https://tools.ietf.org/html/draft-smith-v6ops-larger-ipv6-loopback-prefix-04 > ---------|---------|---------|---------|---------|---------|---------|-- > > -- Kindest regards, Tom Smyth.
