dependency of iproute

$ aptitude purge iproute

The following packages will be REMOVED:  

  iproute{p} 

0 packages upgraded, 0 newly installed, 1 to remove and 0 not upgraded.

Need to get 0 B of archives. After unpacking 23.6 kB will be freed.

The following packages have unmet dependencies:

 mariadb-server-10.1 : Depends: iproute but it is not going to be installed.

The following actions will resolve these dependencies:

     Remove the following packages:

1)     mariadb-server-10.1         

Accept this solution? [Y/n/q/?] q

Abandoning all efforts to resolve these dependencies.

Abort.

$ apt-cache policy | grep -A1 maria

 500 http://ftp.hosteurope.de/mirror/mariadb.org/repo/10.1/ubuntu xenial/main amd64 Packages

     release o=MariaDB,n=xenial,l=MariaDB,c=main,b=amd64

$ lsb_release -dr

Description:	Ubuntu 16.04.3 LTS

Release:	16.04

$ dpkg -l iproute*

Desired=Unknown/Install/Remove/Purge/Hold

| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend

|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)

||/ Name                                        Version                    Architecture               Description

+++-===========================================-==========================-==========================-============================================================================================

ii  iproute                                     1:4.3.0-1ubuntu3.16.04.2   all                        transitional dummy package for iproute2

ii  iproute2                                    4.3.0-1ubuntu3.16.04.2     amd64                      networking and traffic control tools