How to determine the installed network interfaces on Linux and Unix platforms.
Article ID: 100024584
Updated On:
Resolution
Execute the relevant command for the system platform as indicated below to display installed network interfaces.
AIX platform
Command: lscfg -v -l en*
Example:
# lscfg -v -l en*
ent0 U789F.001.AAA5940-P1-T1 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
2-Port 10/100/1000 Base-TX PCI-X Adapter:
Network Address.............0011257E6C22
ROM Level.(alterable).......DV0210
Hardware Location Code......U789F.001.AAA5940-P1-T1
ent1 U789F.001.AAA5940-P1-T2 2-Port 10/100/1000 Base-TX PCI-X Adapter (14108902)
2-Port 10/100/1000 Base-TX PCI-X Adapter:
Network Address.............0011257E6C23
ROM Level.(alterable).......DV0210
Hardware Location Code......U789F.001.AAA5940-P1-T2
HP-UX platform
Command: lanscan | egrep -v 'LinkAgg|Hdw|Path' | awk '{ print $5 }'
Example:
# lanscan | egrep -v 'LinkAgg|Hdw|Path' | awk '{ print $5 }'
lan0
lan2
lan3
lan4
lan5
lan1
Linux Platforms
RedHat Enterprise Linux (RHEL4 / RHEL5)
Command: cat /etc/sysconfig/networking/devices/ifcfg-* | grep -v 'DEVICE=lo' | grep DEVICE
Example:
# cat /etc/sysconfig/networking/devices/ifcfg-* | grep -v 'DEVICE=lo' | grep DEVICE
DEVICE=eth0
DEVICE=eth1
SuSe Linux (SLES9 / SLES10 / SLES11)
Command: cat boot.msg | grep eth | egrep 'done|unused' | awk '{ print $2 }'
Example:
cat boot.msg | grep eth | egrep 'done|unused' | awk '{ print $2 }'
eth0
eth1
eth2
eth3
Solaris platform
Solaris 9
Command: kstat -p |grep link_up | awk -F: '{ print $3 }'
Example:
# kstat -p |grep link_up | awk -F: '{ print $3 }'
ce0
ce1
Solaris 10
Command: dladm show-dev
Example:
# dladm show-dev
nxge0 link: unknown speed: 100 Mbps duplex: full
nxge1 link: unknown speed: 100 Mbps duplex: full
nxge2 link: unknown speed: 100 Mbps duplex: half
nxge3 link: unknown speed: 0 Mbps duplex: unknown
Issue/Introduction
ifconfig" command does not show all interfaces that are installed in the system, only interfaces that are in a configured state.
It is necessary to determine what interfaces are physically installed on a system so the interfaces may be configured.
