2nd IP address on an interface

[Ed Greshko]

On 08/29/14 06:11, Robert Moskowitz wrote:
>
> On 08/28/2014 04:24 PM, Tom Horsley wrote:
>> On Thu, 28 Aug 2014 16:16:55 -0400
>> Robert Moskowitz wrote:
>>
>>> So what is missing?  Do I need a 70-persistent-net.rules for eth0:0 ??
>> These days, I'm pretty sure you are supposed to include
>> IPADDR2=, NETMASK2=, etc. in the one ifcfg-eth0 file
>> rather than creating a eth0:0 file (at least that worked
>> for me on centos 6.5 this week when setting up IP aliases).
> I added the IPADDR2 and NETMASK2 and it did not add the second address.  Even after a reboot.
>

You may be getting confused by using "ifconfig".....

[egreshko at f20f network-scripts]$ cat ifcfg-p2p1
TYPE="Ethernet"
BOOTPROTO=none
DEFROUTE="yes"
IPV4_FAILURE_FATAL=yes
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE="yes"
IPV6_FAILURE_FATAL="no"
NAME="p2p1"
UUID="5ce325cb-5048-48d7-bdc0-457f278fe1f1"
ONBOOT="yes"
DNS1=192.168.1.18
DOMAIN=greshko.com
HWADDR=08:00:27:B7:04:4A
IPADDR0=192.168.1.227
PREFIX0=24
GATEWAY0=192.168.1.1
IPADDR1=192.168.1.19
PREFIX1=24
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes

[egreshko at f20f network-scripts]$ ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.227  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 2001:470:d:6bd:a00:27ff:feb7:44a  prefixlen 64  scopeid 0x0<global>
        inet6 fe80::a00:27ff:feb7:44a  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:b7:04:4a  txqueuelen 1000  (Ethernet)
        RX packets 478  bytes 57719 (56.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 383  bytes 54641 (53.3 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

*BUT*

[egreshko at f20f network-scripts]$ ip addr
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 08:00:27:b7:04:4a brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.227/24 brd 192.168.1.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet 192.168.1.19/24 brd 192.168.1.255 scope global secondary enp0s3
       valid_lft forever preferred_lft forever
    inet6 2001:470:d:6bd:a00:27ff:feb7:44a/64 scope global noprefixroute dynamic
       valid_lft 7200sec preferred_lft 600sec
    inet6 fe80::a00:27ff:feb7:44a/64 scope link
       valid_lft forever preferred_lft forever


And from a second system....

[egreshko at meimei ~]$ ping 192.168.1.19
PING 192.168.1.19 (192.168.1.19) 56(84) bytes of data.
64 bytes from 192.168.1.19: icmp_seq=1 ttl=64 time=0.337 ms
64 bytes from 192.168.1.19: icmp_seq=2 ttl=64 time=0.290 ms
64 bytes from 192.168.1.19: icmp_seq=3 ttl=64 time=0.269 ms


-- 
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