ip tunnel doesn't show warning or error

Linux Advanced Routing and Traffic Control

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This is really strange behavior .. 

root@garfield ~# ip tunnel add testing123 mode ipip remote 192.168.1.1
local 192.168.1.12
root@garfield ~# ip tunnel show
..
testing123: ip/ip  remote 192.168.1.1  local 192.168.1.12  ttl inherit
root@garfield ~# ip tunnel add testingabc mode ipip remote 192.168.1.1
local 192.168.1.12
root@garfield ~# echo $?
0
root@garfield ~# ip tunnel show
..
testing123: ip/ip  remote 192.168.1.1  local 192.168.1.12  ttl inherit

I guess the second tunnel add should end up with an error, but ioctl
doesn't report anything on this .. 

-- 
Radek Vokál <rvokal@xxxxxxxxxx>

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