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IP_Conntrack table Full Errors

edited Jun 8, 2012 3:20AM in Oracle VM (OVM) (MOSC) 1 commentAnswered
In the process of modifing VM's on two of our production servers, the OVM Manager went into a state where all VM's were in an unknown state. I noticed that there were the following messages in /var/log/messages file:

Feb 18 21:13:02 corpapv3 kernel: ip_conntrack: table full, dropping packet.
Feb 18 21:13:02 corpapv3 kernel: printk: 15 messages suppressed.

I issues the command:

sysctl net.ipv4.netfilter.ip_conntrack_max=1048576

On both nodes, and the unknown status on the OVM Manager cleared up and I was able to continue. I have checked the /etc/sysctl.conf file and we have the setting:

net.ipv4.netfilter.ip_conntrack_max=1048576

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