------- Comment From [email protected] 2019-04-12 09:56 EDT-------
I added a self-defined vlan device

root@s8345038:~# lszdev qeth
TYPE  ID                          ON   PERS  NAMES
qeth  0.0.bdf0:0.0.bdf1:0.0.bdf2  yes  yes   enccw0.0.f5f0
qeth  0.0.e400:0.0.e401:0.0.e402  yes  no    ence400
qeth  0.0.e413:0.0.e414:0.0.e415  no   no

root@s8345038:~# ip link add dev ence400.201 link ence400 type vlan id 201
root@s8345038:~# ip a
<snip>
3: ence400: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default 
qlen 1000
link/ether 02:a2:2d:00:05:81 brd ff:ff:ff:ff:ff:ff
4: ence400.201@ence400: <BROADCAST,MULTICAST,M-DOWN> mtu 1500 qdisc noop state 
DOWN group default qlen 1000
link/ether 02:a2:2d:00:05:81 brd ff:ff:ff:ff:ff:ff

Now use chzdev to define the e413 device, and it works:

root@s8345038:~# lszdev qeth
TYPE  ID                          ON   PERS  NAMES
qeth  0.0.bdf0:0.0.bdf1:0.0.bdf2  yes  yes   enccw0.0.f5f0
qeth  0.0.e400:0.0.e401:0.0.e402  yes  no    ence400
qeth  0.0.e413:0.0.e414:0.0.e415  no   no
root@s8345038:~# chzdev -e e413
QETH device 0.0.e413:0.0.e414:0.0.e415 configured
root@s8345038:~# lszdev qeth
TYPE  ID                          ON   PERS  NAMES
qeth  0.0.bdf0:0.0.bdf1:0.0.bdf2  yes  yes   enccw0.0.f5f0
qeth  0.0.e400:0.0.e401:0.0.e402  yes  no    ence400
qeth  0.0.e413:0.0.e414:0.0.e415  yes  yes   ence413

Maybe the difference is the kernel. I can try to update it to the -11
kernel, hope that works...

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https://bugs.launchpad.net/bugs/1822585

Title:
  OSA/qeth inconsistent interface names

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