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Description of problem:

the new long style network device names are to long because vlans with 4 digits cause interface name to be > 15 chars 

you get the error: 

ifup eno33557248.3008
Error: argument "eno33557248.3008" is wrong: "name" too long

ERROR    : [/usr/sbin/ifup] ERROR: could not add vlan 3008 as eno33557248.3008 on dev eno33557248

NetworkManager also cant bring the interface up.

and `ip a` list the interface as "eno33557248.300" missing the 8



Steps to Reproduce:
1. create a network device with a vlan > 999 while using longer name format
2. (optional) disable NetorkManager
3. try and bring the interface online

Actual results:

Error: argument "eno33557248.3008" is wrong: "name" too long


Expected results:

all good

reported upstream to systemd
https://github.com/systemd/systemd/issues/2407

As workaround, in NetworkManager you can configure the interface-name in the connection.

$ nmcli connection modify $CONNECTION_ID connection-interface vlan3008


Pushed a fix to upstream master:
http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=944065c1154a656846dcf37e1cce35d3fb1792ed
http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=778207f23eb2ac022b2ee47968a484fdb94626fe


This only concerns NetworkManager. It is unrelated to using ifup with NetworkManager disabled.

NM now cuts name to fit the device name limitation (16) so long_device_name with vlan to 1024 is shortened from long_device_name.1024 to long_device_.1024 and everything works as expected.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2016-2581.html