Bug 1204105

Summary:	Intel physical function ends up called enp2s0f0
Product:	Red Hat Enterprise Linux 7	Reporter:	lejeczek <peljasz>
Component:	systemd	Assignee:	systemd-maint
Status:	CLOSED NOTABUG	QA Contact:	qe-baseos-daemons
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	7.0	CC:	mschmidt, systemd-maint-list, udev-maint-list
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-06-05 18:30:39 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description lejeczek 2015-03-20 12:03:36 UTC

Description of problem:

enp2s0f0 is, from what I gathered a name for function. I still have enp2s16 and enp2s17 but they are apparently virtual functions.

# biosdevname -d
BIOS device: p13p1
Kernel name: enp2s0f0
Permanent MAC: 00:25:90:72:BB:E2
Assigned MAC : 00:25:90:72:BB:E2
ifIndex: 6
Driver: igb
Driver version: 5.0.5-k
Firmware version: 1.5.3
Bus Info: 0000:02:00.0
PCI name      : 0000:02:00.0
PCI Slot      : 13
Index in slot: 1
Virtual Functions:
0000:02:11.4
0000:02:11.2
0000:02:11.0
0000:02:10.6
0000:02:10.4
0000:02:10.2
0000:02:10.0

BIOS device: p13p2
Kernel name: enp2s0f1
Permanent MAC: 00:25:90:72:BB:E3
Assigned MAC : 00:25:90:72:BB:E3
ifIndex: 14
Driver: igb
Driver version: 5.0.5-k
Firmware version: 1.5.3
Bus Info: 0000:02:00.1
PCI name      : 0000:02:00.1
PCI Slot      : 13
Index in slot: 2
Virtual Functions:
0000:02:11.5
0000:02:11.3
0000:02:11.1
0000:02:10.7
0000:02:10.5
0000:02:10.3
0000:02:10.1

I have:
enp2s16 - what's this?
enp2s17 - what's this?
enp2s0f0 - physical
enp2s0f1 - psysical
enp2s16f1 - virtual
enp2s16f2 - virtual
...

how does one decipher these names???

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Comment 2 Michal Schmidt 2015-06-05 18:30:39 UTC

enp2s0f0 is an interface name derived from PCI geographical information, i.e. it encodes the PCI address 02:00.0.

For information about the naming schemes see:
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/ch-Consistent_Network_Device_Naming.html

or the upstream wiki page:
http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/