Comment 10 for bug 84580

I have the same as Elio Granado wrote:

igold:~% sudo ifup eth0.4
Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
Added VLAN with VID == 4 to IF -:eth0:-
+ [ eth0.4 != lo ]
+ [ -x /bin/ip ]
+ ip route show dev eth0.4
+ grep ^169.254.0.0/16
+ [ ]
+ /bin/ip route add 169.254.0.0/16 dev eth0.4 metric 1000 scope link
RTNETLINK answers: File exists
run-parts: /etc/network/if-up.d/avahi-autoipd exited with return code 2
igold:~%

Of course I already have route to 169.254.0.0/16 via plain eth0, so adding new one on vlan interface gets error.