Trouble with second IP on same nic

sheslostcontrol · 11-20-2009, 05:21 AM

OS: RHEL 5.3
Poweredge 2490 server

Currently have a single cable running into one nic card (eth0). For the past two years this was configured to handle two IPs under eth0:

Code:

1.1.1.1 and 
1.1.1.2

Tonight I discovered that 1.1.1.2 no longer works. Pinging 1.1.1.2 fails, even though the profile is checked and activated under Network Configuration in the gui. Pinging 1.1.1.1 returns satisfactory replies.

Here are the raw ifcfg files for each profile.

live

Code:

[network-scripts]# more ifcfg-live
# Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
DEVICE=eth0
BOOTPROTO=none
HWADDR=00:00:00:00:00:00
ONBOOT=yes
DHCP_HOSTNAME=sub123.web.site
IPADDR=1.1.1.1
NETMASK=255.255.222.0
GATEWAY=1.0.0.1
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes

dev

Code:

[network-scripts]# more ifcfg-dev 
GATEWAY=1.0.0.1
TYPE=Ethernet
DEVICE=eth0
HWADDR=00:00:00:00:00:00
BOOTPROTO=none
NETMASK=255.255.222.0
DHCP_HOSTNAME=sub123.web.site
IPADDR=1.1.1.2
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes

Suggestions on where to look next?

centosboy · 11-20-2009, 05:30 AM

Quote:

Originally Posted by sheslostcontrol

OS: RHEL 5.3
Poweredge 2490 server

Currently have a single cable running into one nic card (eth0). For the past two years this was configured to handle two IPs under eth0:

Code:

1.1.1.1 and 
1.1.1.2

Tonight I discovered that 1.1.1.2 no longer works. Pinging 1.1.1.2 fails, even though the profile is checked and activated under Network Configuration in the gui. Pinging 1.1.1.1 returns satisfactory replies.

Here are the raw ifcfg files for each profile.

live

Code:

[network-scripts]# more ifcfg-live
# Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
DEVICE=eth0
BOOTPROTO=none
HWADDR=00:00:00:00:00:00
ONBOOT=yes
DHCP_HOSTNAME=sub123.web.site
IPADDR=1.1.1.1
NETMASK=255.255.222.0
GATEWAY=1.0.0.1
TYPE=Ethernet
USERCTL=no
IPV6INIT=no
PEERDNS=yes

dev

Code:

[network-scripts]# more ifcfg-dev 
GATEWAY=1.0.0.1
TYPE=Ethernet
DEVICE=eth0
HWADDR=00:00:00:00:00:00
BOOTPROTO=none
NETMASK=255.255.222.0
DHCP_HOSTNAME=sub123.web.site
IPADDR=1.1.1.2
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes

Suggestions on where to look next?

do you have output from

Code:

ifconfig -a

and from

Code:

ip addr

sheslostcontrol · 11-20-2009, 11:11 PM

Quote:

Originally Posted by centosboy

do you have output from

Code:

ifconfig -a

and from

Code:

ip addr

Issue is resolved. I backed up both ifcfg profiles, then copied the "live" profile to "dev" - changed the "dev" address to what it should be (1.1.1.2), saved, issued ifup dev -- viola.

I don't know what was wrong with the dev config in my first post, but that fixed it.