/sbin/ip route add … RTNETLINK answers: File exists

When starting opevpn I encountered strange issue. VPN was connecting but I could not access services behind it.
What I found in its log was:

Thu Oct 16 12:15:50 2014 /sbin/ip route add 10.1.1.0/24 via 10.1.1.1
RTNETLINK answers: File exists

It turned out the newly added route was conflicting with other route (a leftover from messing up vpn-things).

First, I removed the conflicting rule:

sudo route del -net 10.1.1.0 netmask 255.255.255.0

Then I manually added the route the vpn was trying to add (but I think it’s optional and simply restarting the VPN would do the thing)

/sbin/ip route add 10.1.1.0/24 via 10.1.1.1

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