Hi,

I have an eth0 interface (it's a CentOS 6 guest VM on a KVM host) which is configured as follows (see below) with a primary public IP address of xxx.xxx.xxx.130 (which works fine). I cannot set an alias IP address. I want eth0 to also use another IP address (xxx.xxx.xxx.131, so I create /etc/sysconfig/network-scripts/ifcfg-eth0:1. Then:

# service network restart Shutting down interface eth0: Device state: 3 (disconnected) [ OK ] Shutting down loopback interface: [ OK ] Bringing up loopback interface: [ OK ] Bringing up interface eth0: Active connection state: activated Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/2 [ OK ] # ping xxx.xxx.xxx.130 PING xxx.xxx.xxx.130 (xxx.xxx.xxx.130) 56(84) bytes of data. 64 bytes from xxx.xxx.xxx.130: icmp_seq=1 ttl=64 time=0.078 ms 64 bytes from xxx.xxx.xxx.130: icmp_seq=2 ttl=64 time=0.044 ms ^C --- xxx.xxx.xxx.130 ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1767ms rtt min/avg/max/mdev = 0.044/0.061/0.078/0.017 ms

# ping xxx.xxx.xxx.131 PING xxx.xxx.xxx.131 (xxx.xxx.xxx.131) 56(84) bytes of data. From xxx.xxx.xxx.130 icmp_seq=2 Destination Host Unreachable

If I try:

# ifup eth0:1 Active connection state: activating Active connection path: /org/freedesktop/NetworkManager/ActiveConnection/3 state: activated Connection activated

then I totally lose network connectivity.

What am I doing wrong? Please advise!

-------------------------------------------------------------- eth0 -------------------------------------------------------------- DEVICE="eth0" NM_CONTROLLED="yes" ONBOOT="yes" HWADDR="DE:DB:EE:CD:8E:03" TYPE=Ethernet BOOTPROTO=static GATEWAY=xxx.xxx.xxx.129 NETWORK=xxx.xxx.xxx.128 IPADDR=xxx.xxx.xxx.130 NETMASK=255.255.255.248 BROADCAST=xxx.xxx.xxx.135 IPV6INIT=yes IPV6_AUTOCONF=no IPV6ADDR=2001:xxxx:xxxx:xxxx::130 IPV6_DEFAULTGW=2001:xxxx:xxxx:14::1 DNS1=xxx.xxx.xxx.211 DNS2=xxx.xxx.xxx.210 DNS3=2001:xxxx:xxxx:xxxx::210 IPV4_FAILURE_FATAL=no IPV6_FAILURE_FATAL=no DOMAIN="example.com example.com" --------------------------------------------------------------

I've tried: -------------------------------------------------------------- eth0:1 -------------------------------------------------------------- DEVICE="eth0:1" ONPARENT="yes" BOOTPROTO=none IPADDR=xxx.xxx.xxx.131 NETMASK=255.255.255.248 BROADCAST=xxx.xxx.xxx.135 --------------------------------------------------------------

and: -------------------------------------------------------------- eth0:1 -------------------------------------------------------------- DEVICE="eth0:1" NM_CONTROLLED="yes" ONBOOT="yes" HWADDR="DE:DB:EE:CD:8E:03" TYPE=Ethernet BOOTPROTO=static ONPARENT="yes" GATEWAY=xxx.xxx.xxx.129 NETWORK=xxx.xxx.xxx.128 IPADDR=xxx.xxx.xxx.131 NETMASK=255.255.255.248 BROADCAST=xxx.xxx.xxx.135 IPV6INIT=yes IPV6_AUTOCONF=no IPV6ADDR=2001:xxxx:xxxx:xxxx::131 IPV6_DEFAULTGW=2001:xxxx:xxxx:xxxx::1 DNS1=xxxx.xxxx.xxxx.211 DNS2=xxxx.xxxx.xxxx.210 DNS3=2001:xxxx:xxxx:xxxx::210 IPV4_FAILURE_FATAL=no IPV6_FAILURE_FATAL=no DOMAIN="example.com example.com" --------------------------------------------------------------

Thanks, Nick