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| CentOS multiple IP's can't ping in or out https://forum.linode.com/viewtopic.php?f=19&t=5944 |
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| Author: | RBurbank [ Wed Aug 25, 2010 9:47 pm ] |
| Post subject: | CentOS multiple IP's can't ping in or out |
I setup multiple IP's on my CentOS Linode with a static configuration for eth0 and eth0:0. From the box itself eth0:0 responds to ping or http requests. Externally, I can not ping the new IP and I can't ping out either. It appears to me that I need to add a second gateway or route. I tried a GATEWAY statement in ifcfg-eth0:0 and it did not help. I would like to point out that eth0 is working fine. Any suggestions? Here are my IP's from the Linode network page: eth0: 74.207.242.xxx ( lixx-xxx.members.linode.com ) eth0: 173.230.152.xxx ( lixxx-xxx.members.linode.com ) Gateways: 74.207.242.1 173.230.152.1 Netmask: 255.255.255.0 DNS Servers: 74.207.241.5 74.207.242.5 My primary IP before adding the second IP was 173.230.152.xxx. It is still eth0 in the static configuration. ######## File ifcfg-eth0 DEVICE=eth0 BOOTPROTO=none ONBOOT=yes IPADDR=173.230.152.xxx NETMASK=255.255.255.0 GATEWAY=173.230.152.1 ########File ifcfg-eth0:0 # Configuration for eth0:0 DEVICE=eth0:0 BOOTPROTO=none ONBOOT=yes IPADDR=74.207.242.xxx NETMASK=255.255.255.0 |
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| Author: | BarkerJr [ Wed Aug 25, 2010 9:56 pm ] |
| Post subject: | |
First, the eth0:0 should be ONPARENT, not ONBOOT. Also, don't forget to arping after you ifup. arping -UI eth0 -qc 5 173.230.152.xxx arping registers it with the gateway so it knows where to route your packets.. |
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| Author: | RBurbank [ Thu Aug 26, 2010 2:26 am ] |
| Post subject: | |
Thanks for the reply BarkerJr. I made the ONPARENT change and ran the arping. No change. The interface responds from the server console but not from remote. I tried with the firewall turned off as well. |
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| Author: | Internat [ Thu Aug 26, 2010 3:18 am ] |
| Post subject: | |
have you rebooted since you put the new ips on? |
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| Author: | jed [ Thu Aug 26, 2010 9:38 am ] |
| Post subject: | |
You added the second IP fairly recently, but haven't rebooted since a while ago (I found you). Our system requires a reboot after adding or removing IPs, in order to configure the backend for you. Fire off a quick reboot and I bet you it'll work. |
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| Author: | RBurbank [ Thu Aug 26, 2010 10:32 am ] |
| Post subject: | |
Thanks guys. I rebooted the Linode and its working fine now. Initially, I just restarted network. |
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