[arin-ppml] was -squatting. Why not use the /8 you already have?

Owen DeLong owen at delong.com
Fri May 17 21:06:09 EDT 2019


You’ll also have to rewrite the linux kernel which treats all of 127.0.0.0/8 as quasi-automatically configured on interface lo.

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever

PING 127.5.20.2 (127.5.20.2) 56(84) bytes of data.
64 bytes from 127.5.20.2: icmp_seq=1 ttl=64 time=0.064 ms
64 bytes from 127.5.20.2: icmp_seq=2 ttl=64 time=0.063 ms
64 bytes from 127.5.20.2: icmp_seq=3 ttl=64 time=0.061 ms
^C
--- 127.5.20.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 54ms
rtt min/avg/max/mdev = 0.061/0.062/0.064/0.009 ms

YMMV

Owen




> On May 17, 2019, at 14:07 , Töma Gavrichenkov <ximaera at gmail.com> wrote:
> 
> On Fri, May 17, 2019, 11:40 PM william manning <chinese.apricot at gmail.com <mailto:chinese.apricot at gmail.com>> wrote:
> A much simpler task than repurposing v4 multicast would be to just use the exisiting /8 that everyone already has in use.  May I present for your consideration;   127.0.0.0/8 <http://127.0.0.0/8>
> 
> Such a flavor of network engineering sort of assumes one's ready to maintain a substantial number of patches though.
> 
> (/me also used up to a few /22s out of 127/8 back in the past. Was a weird experience because of several reasons.)
> 
> The "IPv4 unicast extensions" project might sort it out eventually, together with the unused multicast and "experimental" space.
> 
> --
> Töma
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