* Ubuntu Test Network

Config: 
Network: enp4s0 = 242.2.2.1/24 

* Debian /etc/network/interfaces

Works if you specify netmask

test: ifdown, ifup

* isc dhcp server

serves dhcp on 242.2.2.1 with the right range

bug in my setup? Gives itself two addresses

    inet 242.2.2.1/24 brd 242.2.2.255 scope global enp4s0
       valid_lft forever preferred_lft forever
    inet 242.2.2.10/24 brd 242.2.2.255 scope global secondary enp4s0
       valid_lft forever preferred_lft forever

lease 242.2.2.11 {
  starts 2 2018/10/16 18:17:08;
  ends 2 2018/10/16 18:27:08;
  cltt 2 2018/10/16 18:17:08;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:1e:06:20:17:b7;
  client-hostname "c2";
}

* Avahi mdns

WORKS: serves mdns

Oct 16 10:47:41 prancer avahi-daemon[596]: Joining mDNS multicast group on interface enp4s0.IPv4 with address 242.2.2.1.
Oct 16 10:47:41 prancer avahi-daemon[596]: New relevant interface enp4s0.IPv4 for mDNS.
Oct 16 10:47:41 prancer avahi-daemon[596]: Registering new address record for 242.2.2.1 on enp4s0.IPv4.

Test elsewhere: mdns-scan

* TP-link smart switch 

Takes a 242.2.2.X via DHCP. Is also assignable directly

* dns servers
** linode dns setup

classe.taht.net resolves from various vantage points I have.

242.2.2.1 classe.taht.net

225.0.0.1 mcast.taht.net

127.2.0.1 lhost.taht.net

I don't have a good way to test reverse lookup. We'd need
bind9 etc to have reverse lookups for this stuff.

dnsmasq, bind9, linode work

** bind

DHCPREQUEST of 242.2.2.10 on enp4s0 to 242.2.2.1 port 67 (xid=0xadcd0e1)

** bind9

Serves 242.2.2.1 up as dns

Local bind9 server works.

Can slaves take it?

nsupdate?

host
nslookup

ip add add 242.2.1.1/24 broadcast 242.2.1.255 dev enp0s20u2

enp0s20u2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 242.2.1.1  netmask 255.255.255.0  broadcast 0.0.0.0

* wpa_supplicant and hostapd

* client boxes

** odroid C2 running debian

Linux c2 3.10.96-161 #1 SMP PREEMPT Mon Aug 29 23:32:06 UTC 2016 armv7l armv7l armv7l GNU/Linux

lease 242.2.2.11 {
  starts 2 2018/10/16 18:17:08;
  ends 2 2018/10/16 18:27:08;
  cltt 2 2018/10/16 18:17:08;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:1e:06:20:17:b7;
  client-hostname "c2";
}

** Chip over usb gadget 

** OSX

Takes 242.2.2.X address over wifi with 

* Babeld (with a patch)

routes 242.2.2.0 just fine... briefly

ip route add 224.2.2.0/24 from 0.0.0.0/0 table 254 metric 0 dev eno1 via 172.22.0.85 proto 42

Other babeld listeners start logging martian prefixes every 4 seconds. This
just dumps to syslog, normally.

* iptables masq - (nat) 

* 127/8

* TODO update babel daemon on gateway


* 224

iface enp0s20u2
        address 224.2.1.1
        netmask 255.255.255.0
        broadcast 224.2.1.255

/etc/network/interfaces:24: unknown or no address type and no inherits keyword specified

* Traceroute tests

On my network (which does no filtering til it hits the default gw)
traceroute -n classe.taht.net wanders til that point.

On linode there is no response even on the first hop.

* Other bugs
** Hostapd broke in general:
https://bugzilla.redhat.com/show_bug.cgi?id=1570903
** My sysupgrade to ubuntu 18.04 LTS broke my build box
** TP-link easy switch

Never generates a dhcp request anymore in the first place.
You can't get to it from elinks because it requires javascript
It doesn't work through a polipo proxy on the box
and it defaults to 192.168.0.1. Out there, there are millions
of networks with the switch interfereing with everything else.