Hi all,

in centos7 I run openstack pike with two nodes

node1 - 192.168.178.100 (controller,network)
node2 - 192.168.178.101 (compute)

[root@openstack ~(keystone_admin)]# nova list
+--------------------------------------+-----------+--------+------------+-------------+-----------------------------------+
| ID | Name | Status | Task State | Power State | Networks |
+--------------------------------------+-----------+--------+------------+-------------+-----------------------------------+
| a470d85b-4755-41e0-a4a1-f25fd459f498 | instance1 | ACTIVE | - | Running | private=10.0.0.5, 192.168.178.140 |
+--------------------------------------+-----------+--------+------------+-------------+-----------------------------------+


ping from qrouter to instance works


[root@openstack ~(keystone_admin)]# ip netns exec qrouter-67894085-691c-4bbd-8bb2-837830412062 ping 192.168.178.140
PING 192.168.178.140 (192.168.178.140) 56(84) bytes of data.
64 bytes from 192.168.178.140: icmp_seq=1 ttl=64 time=7.64 ms
64 bytes from 192.168.178.140: icmp_seq=2 ttl=64 time=0.671 ms
64 bytes from 192.168.178.140: icmp_seq=3 ttl=64 time=0.807 ms


but ping from node to instance doesn't.


[root@openstack ~(keystone_admin)]# ping 192.168.178.140
PING 192.168.178.140 (192.168.178.140) 56(84) bytes of data.
From 192.168.178.100 icmp_seq=1 Destination Host Unreachable
From 192.168.178.100 icmp_seq=2 Destination Host Unreachable
From 192.168.178.100 icmp_seq=3 Destination Host Unreachable
From 192.168.178.100 icmp_seq=4 Destination Host Unreachable


arp is incomplete


[root@openstack ~(keystone_admin)]# arp -n
Address HWtype HWaddress Flags Mask Iface
192.168.178.50 ether 30:52:cb:84:b3:d9 C eno16777728
192.168.178.140 (incomplete) eno16777728
192.168.178.101 ether 00:0c:29:0e:45:79 C eno16777728
192.168.178.1 ether 08:96:d7:41:bf:18 C eno16777728


Any idea why this is happening?

Many thanks!

Hi,

probled is resolved. I had configured my external network with provider_type vlan, but my physical router uses flat network.
Therefore it could not work. After I configured my external network as flat. It works now!

1 members found this post helpful.