Список опций: /usr/share/doc/initscripts* и /usr/share/doc/net-scripts*

Алиасы:
   /etc/sysconfig/network-scripts/ifcfg-eth0:1
      DEVICE=eth0:1
      BOOTPROTO=static
      IPADDR=192.168.1.1
      NETMASK=255.255.255.0
      ONBOOT=yes

Множественное задание алиасов:

   /etc/sysconfig/network-scripts/ifcfg-eth0-range0
      DEVICE=eth0:1-10
      BOOTPROTO=static
      IPADDR_START=192.168.10.100
      IPADDR_END=192.168.10.110
      CLONENUM_START=0
      NETMASK=255.255.255.0
      ONBOOT=yes

   или /etc/sysconfig/network-scripts/ifcfg-eth0:0:
      IPADDR=192.168.1.1-10

Вланы:

   /etc/sysconfig/vlan
      DOT1Q_VLANS=yes
      VLAN_NAMING=VLAN_PLUS_VID

   /etc/sysconfig/network-scripts/ifcfg-vlan0002
      DEVICE=vlan0002
      VLAN_TRUNK_IF=eth0
      BOOTPROTO=static
      IPADDR=192.168.1.1
      NETMASK=255.255.255.252
      ONBOOT=yes

IP туннель:
   /etc/sysconfig/network-scripts/ifcfg-iptun0
      DEVICE=iptun0
      TUNLOCAL=172.16.0.2
      TUNREMOTE=172.16.0.1
      PHYSLOCAL=192.168.1.1
      PHYSREMOTE=192.196.2.1
      TTL=16
      TYPE=ipip # можно gre
      ONBOOT=yes

IPSec:
   /etc/sysconfig/network-scripts/ifcfg-ipsectun0
      DEVICE=ipsectun0
      TUNLOCAL=10.0.0.1
      TUNREMOTE=10.0.0.2
      PHYSLOCAL=192.168.0.1
      PHYSREMOTE=192.168.0.2
      SPI=0x1000
      # Each tunnel must have CIPHER and/or DIGEST.
      # Basedir for CIPHERFILE and DIGESTFILE is /etc/ipsec.
      CIPHER=3des-cbc
      CIPHERFILE=random-3des.key
      DIGEST=md5
      DIGESTFILE=random-md5.key
      ONBOOT=no