NetworkManager - DHCP and Link-Local on the same interface

[BrianSidebotham]

Hi everyone,

I'm trying to use nmcli (0.9.10) to try and setup eth0 to have a DHCP and link-local address, but they appear to be mutually exclusive through nmcli.

Through
/etc/network/interfaces I used to do:



iface eth0 inet dhcp

# Make sure eth0 is always the preferred route
metric 0

# Add link local route for link-local traffic
pre-up ip route add 169.254.0.0/16 dev $IFACE

# Add our link local address for technician laptop communication
pre-up ip addr add 169.254.127.100/16 broadcast 169.254.255.255 dev $IFACE label $IFACE:0

# Do the reverse for rip-down
pre-down ip addr del 169.254.127.100/16 dev $IFACE label $IFACE:0
pre-down ip route del 169.254.0.0/16 dev $IFACE


Which worked as intended (although with a static IP address for the link-local). Is there anyway of doing this through nmcli, and in particular is there a way of doing this with the link-local
ipv4.method property so
avahi can be used to grab a good ipv4 link local address?

It's a shame ipv6 link local addresses are not browser-compatible!

[BrianSidebotham]

This is an old thread of mine, but now I have it working and this is a high Google search ranking I may as well post the solution.

I have the connection marked as `ipv4.method=auto` and I've added a dispatcher script to /etc/NetworkManager/dispatcher.d/ which this contents:


#!/bin/sh

IFACE=$1
STATUS=$2

# All wired connections get a link-local address forced on them!
if [ ! -d "/sys/class/net/${IFACE}/wireless" ]; then
case ${STATUS} in
up)
avahi-autoipd --force-bind -D ${IFACE}
;;
down)
avahi-autoipd --kill ${IFACE}
;;
esac
fi