Problem with no traffic using VXLAN provider network type

asked 2018-02-12 04:12:36 -0600

anniemelen gravatar image

Hello, guys!

I need help with VXLAN tunnelling in Openstack environment.

Recently I've installed Openstack (Pike Release) on five nodes: 3 controllers + 2 compute hosts. My configuration is default: Keystone, Nova, Neutron, Glance, Cinder, Horizon. Everything was fine until I've started to test connectivity between instances...

I should notice, that I have no problem with VLAN networks, only with VXLAN. So, my problem is:

  1. Create new private network (provider type - VXLAN ) and private subnet - OK.

  2. Create two instances with interfaces attached to this network (static ips) - OK.

  3. Ping one instance from another - FAILED, 100% packages lost.

Of course, security groups are updated to allow ICMP traffic, so it's not the point.

Instances were created either on different compute hosts or on the same node.

While debugging this issue I've discovered that 'arp -n' command in instance shows MAC address of another instance. Tcpdump show me ARP replies and ARP requests, but no ICMP packages at all. Besides, ‘tcpdump –i any port 4789’ command doesn't show ANY traffic!

Some config files and ovs tables are attached.

On COMPUTE nodes:

ifconfig

bond0     Link encap:Ethernet  HWaddr 68:05:ca:45:d9:e5
          UP BROADCAST RUNNING MASTER MULTICAST  MTU:1500  Metric:1
          RX packets:16190415 errors:0 dropped:68 overruns:0 frame:0
          TX packets:16767959 errors:0 dropped:24 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5151211782 (5.1 GB)  TX bytes:5295572182 (5.2 GB)

bond1     Link encap:Ethernet  HWaddr 96:43:71:6d:c9:5c
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

bond0.400 Link encap:Ethernet  HWaddr 68:05:ca:45:d9:e5
          inet addr:172.31.200.26  Bcast:172.31.200.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5988934 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5943793 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:312858765 (312.8 MB)  TX bytes:386704939 (386.7 MB)

bond0.406 Link encap:Ethernet  HWaddr 68:05:ca:45:d9:e5
          inet addr:172.31.206.26  Bcast:172.31.206.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1711410 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1399971 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1363079442 (1.3 GB)  TX bytes:843095076 (843.0 MB)

bond0.408 Link encap:Ethernet  HWaddr 68:05:ca:45:d9:e5
          inet addr:172.31.208.26  Bcast:172.31.208.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped ...
(more)
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Comments

Was this ever solved? I am having the same problem with VXLANs but on linuxbridge instead of open vswitch.

woltjert gravatar imagewoltjert ( 2018-07-09 12:37:56 -0600 )edit