[Dnsmasq-discuss] client q: both static and dhcp

[Carl Karsten]

This is a bit OT, if there is a better place let me know.

I'm looking for advice on haveing some boxes to have both dynamic and
static IPs.

There is a risk that my static choice collides with an IP on a random lan I
jack into, which I can deal with manually.  Might even make a MOTD message
telling me why I can't log in and see the MOTD ;)

What else might be a problem?

This conf gets me that:

juser at gator:~$ cat /etc/network/interfaces
auto lo enp0s31f6 enp0s31f6:0
iface lo inet loopback

iface enp0s31f6 inet static
    address 192.168.1.31
    netmask 255.255.255.0
    gateway 192.168.1.1

iface enp0s31f6:0 inet dhcp

juser at gator:~$ ip a show enp0s31f6
2: enp0s31f6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
state UP group default qlen 1000
    link/ether 40:8d:5c:7f:bb:90 brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.31/24 brd 192.168.1.255 scope global enp0s31f6
       valid_lft forever preferred_lft forever
    inet 192.168.1.118/24 brd 192.168.1.255 scope global secondary dynamic
enp0s31f6:0
       valid_lft 14219sec preferred_lft 14219sec
    inet6 fe80::428d:5cff:fe7f:bb90/64 scope link
       valid_lft forever preferred_lft forever

juser at gator:~$ /sbin/route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0
enp0s31f6
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0
enp0s31f6


-- 
Carl K
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