[Openstack] OpenVSwitch inside Instance no ARP passthrough

Mathias Strufe (DFKI) mathias.strufe at dfki.de
Sat Jan 27 19:00:00 UTC 2018


Dear all,

I'm quite new to openstack and like to install openVSwtich inside one 
Instance of our Mitika openstack Lab Enviornment ...
But it seems that ARP packets got lost between the network interface of 
the instance and the OVS bridge ...

With tcpdump on the interface I see the APR packets ...

tcpdump: verbose output suppressed, use -v or -vv for full protocol 
decode
listening on ens6, link-type EN10MB (Ethernet), capture size 262144 
bytes
18:50:58.080478 ARP, Request who-has 192.168.120.10 tell 192.168.120.6, 
length 28
18:50:58.125009 ARP, Request who-has 192.168.120.1 tell 192.168.120.6, 
length 28
18:50:59.077315 ARP, Request who-has 192.168.120.10 tell 192.168.120.6, 
length 28
18:50:59.121369 ARP, Request who-has 192.168.120.1 tell 192.168.120.6, 
length 28
18:51:00.077327 ARP, Request who-has 192.168.120.10 tell 192.168.120.6, 
length 28
18:51:00.121343 ARP, Request who-has 192.168.120.1 tell 192.168.120.6, 
length 28



but on the OVS bridge nothing arrives ...

tcpdump: verbose output suppressed, use -v or -vv for full protocol 
decode
listening on OVSbr2, link-type EN10MB (Ethernet), capture size 262144 
bytes



I disabled port_security and removed the security group but nothing 
changed

+-----------------------+---------------------------------------------------------------------------------------+
| Field                 | Value                                          
                                        |
+-----------------------+---------------------------------------------------------------------------------------+
| admin_state_up        | True                                           
                                        |
| allowed_address_pairs |                                                
                                        |
| binding:host_id       | node11                                         
                                        |
| binding:profile       | {}                                             
                                        |
| binding:vif_details   | {"port_filter": true, "ovs_hybrid_plug": true} 
                                        |
| binding:vif_type      | ovs                                            
                                        |
| binding:vnic_type     | normal                                         
                                        |
| created_at            | 2018-01-27T16:45:48Z                           
                                        |
| description           |                                                
                                        |
| device_id             | 74916967-984c-4617-ae33-b847de73de13           
                                        |
| device_owner          | compute:nova                                   
                                        |
| extra_dhcp_opts       |                                                
                                        |
| fixed_ips             | {"subnet_id": 
"525db7ff-2bf2-4c64-b41e-1e41570ec358", "ip_address": "192.168.120.10"} 
|
| id                    | 74b754d6-0000-4c2e-bfd1-87f640154ac9           
                                        |
| mac_address           | fa:16:3e:af:90:0c                              
                                        |
| name                  |                                                
                                        |
| network_id            | 917254cb-9721-4207-99c5-8ead9f95d186           
                                        |
| port_security_enabled | False                                          
                                        |
| project_id            | c48457e73b664147a3d2d36d75dcd155               
                                        |
| revision_number       | 27                                             
                                        |
| security_groups       |                                                
                                        |
| status                | ACTIVE                                         
                                        |
| tenant_id             | c48457e73b664147a3d2d36d75dcd155               
                                        |
| updated_at            | 2018-01-27T18:54:24Z                           
                                        |
+-----------------------+---------------------------------------------------------------------------------------+


maybe the port_filter causes still the problem? But how to disable it?

Any other idea?

Thanks and BR Mathias.



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