Code: Select all
[root@system ~]# journalctl --since=yesterday | grep dummy
Mar 14 23:58:24 system systemd-modules-load[218]: Inserted module 'dummy'
Mar 14 23:58:37 system network[2125]: Bringing up interface dummy0: [ OK ]
Mar 14 23:58:37 system network[2125]: Bringing up interface dummy1: [ OK ]
Mar 14 23:58:37 system network[2125]: Bringing up interface dummy2: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device dummy2 does not seem to be present, delaying initialization.
Mar 14 23:58:37 system /etc/sysconfig/network-scripts/ifup-eth[2624]: Device dummy2 does not seem to be present, delaying initialization.
Mar 14 23:58:38 system network[2125]: Bringing up interface dummy3: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device dummy3 does not seem to be present, delaying initialization.
Mar 14 23:58:38 system /etc/sysconfig/network-scripts/ifup-eth[2648]: Device dummy3 does not seem to be present, delaying initialization.
Mar 14 23:58:39 system network[2715]: Bringing up interface dummy0: RTNETLINK answers: File exists
Mar 14 23:58:39 system network[2715]: Bringing up interface dummy1: RTNETLINK answers: File exists
Mar 14 23:58:40 system network[2715]: Bringing up interface dummy2: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device dummy2 does not seem to be present, delaying initialization.
Mar 14 23:58:40 system /etc/sysconfig/network-scripts/ifup-eth[4040]: Device dummy2 does not seem to be present, delaying initialization.
Mar 14 23:58:40 system network[2715]: Bringing up interface dummy3: ERROR : [/etc/sysconfig/network-scripts/ifup-eth] Device dummy3 does not seem to be present, delaying initialization.
Mar 14 23:58:40 system /etc/sysconfig/network-scripts/ifup-eth[4064]: Device dummy3 does not seem to be present, delaying initialization.
Code: Select all
[root@system ~]# cat /etc/modules-load.d/dummy.conf
dummy
[root@system ~]# cat /etc/modprobe.d/dummyopts.conf
options dummy numdummies=6
Code: Select all
[root@system ~]# ip addr | grep dummy
4: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.248/32 brd 10.255.25.248 scope global dummy0
5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.31/32 brd 10.255.25.31 scope global dummy1
Code: Select all
[root@system ~]# /sbin/ip link add dummy2 type dummy
[root@system ~]# /sbin/ip link add dummy3 type dummy
[root@system ~]# ip addr | grep dummy
4: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.248/32 brd 10.255.25.248 scope global dummy0
5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.31/32 brd 10.255.25.31 scope global dummy1
8: dummy2: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 1000
9: dummy3: <BROADCAST,NOARP> mtu 1500 qdisc noop state DOWN qlen 1000
Code: Select all
[root@system ~]# ip addr | grep dummy
4: dummy0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.248/32 brd 10.255.25.248 scope global dummy0
5: dummy1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.31/32 brd 10.255.25.31 scope global dummy1
8: dummy2: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.25.30/32 brd 10.255.25.30 scope global dummy2
9: dummy3: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN qlen 1000
inet 10.255.21.30/32 brd 10.255.21.30 scope global dummy3
(from syslog/journal)
Mar 15 00:17:58 system /etc/sysconfig/network-scripts/ifup-eth[12584]: Device dummy2 does not seem to be present, delaying initialization.
Mar 15 00:24:13 system network[14626]: Bringing up interface dummy0: RTNETLINK answers: File exists
Mar 15 00:24:14 system network[14626]: Bringing up interface dummy1: RTNETLINK answers: File exists
Mar 15 00:24:15 system network[14626]: Bringing up interface dummy2: [ OK ]
Mar 15 00:24:15 system network[14626]: Bringing up interface dummy3: [ OK ]