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<div style="font-size: 14px; font-family: Calibri, sans-serif;">Hi,</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">Using devstack to deploy OpenStack, I have Controller + Network running at one physical node and Compute at a separate node.</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">I launched a VM at the Compute node with a private address 10.0.0.2 (Neutron router interface is 10.0.0.1).</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">At the Controller node, in the qrouter namespace, I could not ping the VM private address 10.0.0.2.</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">At the Compute node, tcpdump of the tap interface indicated ARP requests were received.</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">However, it did not show any ARP response.</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">My understanding is that the VM’s virtual interface is directly connected to this tap interface. Since the VM is unreachable, I cannot</div>
<div style="font-size: 14px; font-family: Calibri, sans-serif;">launch its console to see if the ARP requests are received at the virtual interface.</div>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">Any suggestions on how to troubleshoot this? </div>
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<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ nova show vm1</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">+--------------------------------------+----------------------------------------------------------------+</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| Property | Value |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">+--------------------------------------+----------------------------------------------------------------+</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-DCF:diskConfig | MANUAL |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-EXT-AZ:availability_zone | nova |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-EXT-STS:power_state | 1 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-EXT-STS:task_state | - |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-EXT-STS:vm_state | active |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-SRV-USG:launched_at | 2014-10-12T14:25:15.000000 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| OS-SRV-USG:terminated_at | - |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| accessIPv4 | |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| accessIPv6 | |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| config_drive | |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| created | 2014-10-12T14:23:30Z |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| flavor | m1.tiny (1) |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| hostId | 00ac69883737ebd290ad4f38cae979a6e268902333261ba6bfbade44 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| id | 04b5a345-cadf-4dee-9209-5bcf589b6a3c |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| image | cirros-0.3.2-x86_64-uec (14a55982-a093-4850-80c8-7b2ae3a7eaba) |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| key_name | - |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| metadata | {} |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| name | vm1 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| os-extended-volumes:volumes_attached | [] |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| private network | 10.0.0.2, 172.29.173.5 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| progress | 0 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| security_groups | default |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| status | ACTIVE |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| tenant_id | 90058797dddc49efae4d1f45aa5ab982 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| updated | 2014-10-12T14:23:39Z |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">| user_id | 5ab6344540974a1fbda5b539778ebe35 |</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">+--------------------------------------+----------------------------------------------------------------+</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ </p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ ip netns</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">qdhcp-f55f0683-830f-4523-82cb-46d638f91d47</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">qrouter-62aecbdd-d58d-4b33-a743-b16ca38544c5</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ </p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ </p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">localadmin@qa4:~/devstack$ sudo ip netns exec qrouter-62aecbdd-d58d-4b33-a743-b16ca38544c5 ping 10.0.0.2</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">PING 10.0.0.2 (10.0.0.2) 56(84) bytes of data.</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=1 Destination Host Unreachable</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=2 Destination Host Unreachable</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=3 Destination Host Unreachable</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=4 Destination Host Unreachable</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=5 Destination Host Unreachable</p>
<p style="margin: 0px; font-size: 11px; font-family: Menlo;">From 10.0.0.1 icmp_seq=6 Destination Host Unreachable</p>
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<p style="margin: 0px;"><font face="Times">localadmin@qa5:~/devstack$ sudo tcpdump -i tapade47169-57</font></p>
<p style="margin: 0px;"><font face="Times">tcpdump: WARNING: tapade47169-57: no IPv4 address assigned</font></p>
<p style="margin: 0px;"><font face="Times">tcpdump: verbose output suppressed, use -v or -vv for full protocol decode</font></p>
<p style="margin: 0px;"><font face="Times">listening on tapade47169-57, link-type EN10MB (Ethernet), capture size 65535 bytes</font></p>
<p style="margin: 0px;"><font face="Times">11:58:30.042379 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42</font></p>
<p style="margin: 0px;"><font face="Times">11:58:31.041840 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42</font></p>
<p style="margin: 0px;"><font face="Times">11:58:32.041848 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42</font></p>
<p style="margin: 0px;"><font face="Times">11:58:33.044212 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42</font></p>
<p style="margin: 0px;"><font face="Times">11:58:34.041866 ARP, Request who-has 10.0.0.2 tell 10.0.0.1, length 42</font></p>
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<div style="font-size: 14px; font-family: Calibri, sans-serif;">Thanks,</div>
<div style="font-size: 14px; font-family: Calibri, sans-serif;">Danny</div>
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