Hallo zusammen
zunächst nochmal danke für die vielen Antworten. Ich habe die folgenden Ausgaben erzeugt:

Code:
sr1111:/home/christoph # ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
    link/ether 00:22:19:28:1a:cb brd ff:ff:ff:ff:ff:ff
    inet 10.122.114.111/23 brd 10.122.115.255 scope global enp4s0
       valid_lft forever preferred_lft forever
    inet6 fe80::222:19ff:fe28:1acb/64 scope link 
       valid_lft forever preferred_lft forever
Code:
sr1111:/home/christoph # ip route
default via 10.122.114.1 dev enp4s0  proto static 
10.122.114.0/23 dev enp4s0  proto kernel  scope link  src 10.122.114.111  metric 1
Code:
sr1111:/home/christoph # ip -s link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    RX: bytes  packets  errors  dropped overrun mcast   
    33440      351      0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    33440      351      0       0       0       0      
2: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT qlen 1000
    link/ether 00:22:19:28:1a:cb brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast   
    66729      1029     0       0       0       0      
    TX: bytes  packets  errors  dropped carrier collsns 
    19746      201      0       0       0       0
Code:
sr1111:/home/christoph # dmesg | grep enp4s0
[    5.869096] systemd-udevd[318]: renamed network interface eth0 to enp4s0
[   18.666098] IPv6: ADDRCONF(NETDEV_UP): enp4s0: link is not ready
[   20.340766] tg3 0000:04:00.0 enp4s0: Link is up at 100 Mbps, full duplex
[   20.340774] tg3 0000:04:00.0 enp4s0: Flow control is off for TX and off for RX
[   20.340789] IPv6: ADDRCONF(NETDEV_CHANGE): enp4s0: link becomes ready
Code:
sr1111:/home/christoph # /sbin/ifconfig
enp4s0    Link encap:Ethernet  Hardware Adresse 00:22:19:28:1A:CB  
          inet Adresse:10.122.114.111  Bcast:10.122.115.255  Maske:255.255.254.0
          inet6 Adresse: fe80::222:19ff:fe28:1acb/64 Gültigkeitsbereich:Verbindung
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1866 errors:0 dropped:0 overruns:0 frame:0
          TX packets:356 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 Sendewarteschlangenlänge:1000 
          RX bytes:120927 (118.0 Kb)  TX bytes:29722 (29.0 Kb)
          Interrupt:17 
lo        Link encap:Lokale Schleife  
          inet Adresse:127.0.0.1  Maske:255.0.0.0
          inet6 Adresse: ::1/128 Gültigkeitsbereich:Maschine
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:563 errors:0 dropped:0 overruns:0 frame:0
          TX packets:563 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 Sendewarteschlangenlänge:0 
          RX bytes:53556 (52.3 Kb)  TX bytes:53556 (52.3 Kb)
Code:
sr1111:/home/christoph # /sbin/route -n
Kernel IP Routentabelle
Ziel            Router          Genmask         Flags Metric Ref    Use Iface
0.0.0.0         10.122.114.1    0.0.0.0         UG    0      0        0 enp4s0
10.122.114.0    0.0.0.0         255.255.254.0   U     1      0        0 enp4s0
Code:
sr1111:/home/christoph # ls /etc/sysconfig/network/ifcfg-*
/etc/sysconfig/network/ifcfg-enp4s0  /etc/sysconfig/network/ifcfg-lo
Ich verzweifel noch vor der Kiste....

Viele Grüße