Hi Jingting, just few general hints (probably already checked):
- security group rules in openstack (check both igress, egress, ….) – it’s quite common that after deployment it’s have to be modified - Iptables / fw ? – check if some packets are dropped - Cross-check if vlan is properly configured on physical interfaces - If you use tunnels, ensure that both IP’s are on bridges not on ported NIC’s Best regards, Michal From: 康敬亭 [mailto:[email protected]] Sent: Thursday, March 03, 2016 4:20 AM To: openstack-dev <[email protected]> Subject: [openstack-dev] [Neutron] VM could not get IP from dhcp server Hi guys: I have openstack Liberty(linuxbridge + vxlan) installed, and the vm could not get IP from dhcp server. Troubleshooting: Using tcpdump can get dhcp discover packet on physical NIC on network node, but can't get it on vxlan port(vxlan-100) on network node. In opposite direction, Sending arp broadcast in dhcp namespace, and we can get packet on vxlan port(vxlan-100) but can't get packet on physical NIC. However, we find port 8472 is being listened. Meanwhile all interfaces(vxlan-100, physical NIC) are up and running. What could be the reason for the issue? Any comments are appreciated. BR, Jingting -------------------------------------------------------------- Intel Research and Development Ireland Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
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