Hi, We are running OpenStack Folsom on CentOS 6.4. Quantum-linuxbridge-agent is used. Its external network is configured to use VLAN 83 and its address range is 10.12.83.0/24. The IP of the Quantum node is 10.12.183.11/24.
The problem is that after reboot, the quantum node cannot connect to DNS servers (10.12.81.39) for a while (sometime tens of minutes). After boot-up but before the quantum-linuxbridge-agent starts, the default gw is: default 10.12.183.1 0.0.0.0 UG 0 0 0 eth2.183 With the gw, Quantum can get proper data from MySQL server and RabbitMQ server using DNS server. Quantum sets up a bridge on eth2.83 and make it a default gateway (10.12.83.1). Now, there are two gateways: default 10.12.83.1 0.0.0.0 UG 0 0 0 qg-49ff6d2f-a7 default 10.12.183.1 0.0.0.0 UG 0 0 0 eth2.183 The physical router 10.12.83.1 is configured to route for DNS servers. But even with the updated routing table, when I do 'traceroute' DNS server, it routes through 10.12.183.1. And it cannot reach DNS server. When I remove 10.12.183.1 entry from the routing table, it works fine. But, I think it should work as it is because 10.12.183.1 is lower than 10.12.83.1 in the routing table. What could be wrong? I will appreciate any help. Thanks, David -- ---------------------- Dr. Dong-In "David" Kang Computer Scientist USC/ISI _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp