https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/NETVIRT-80 netvirt <p>Scenario:</p> <p> Openstack configured to use vxlan tunnels for vm instacnes and vlan provider for external networks.</p> <p> Openstack with ODL for handling L2 and neutron-l3-agent for handling the L3.<br/> There is a "L2Gateway" like solution to handle the vxlan to vlan conversion for connecting to multiple external networks (vlan) .</p> <p>Problem: <br/> -&gt; When a VM instance in the external vlan tries to send a ARP request to the VM in openstack, the ARP response gets dropped.</p> <p>Operating System: All<br/> Platform: All</p> NETVIRT-80

ARP reply from openstack VM instance to external host present in VLAN Network is dropped

Bug Medium Resolved Won't Do Unassigned Venkatrangan Govindarajan Fri, 19 Aug 2016 00:51:25 +0000 Mon, 8 Apr 2019 16:58:29 +0000 Fri, 9 Mar 2018 17:53:05 +0000 Boron 0 5 <p>Setup: VLAN Provider for External Netowrks and VXLAN for internal communication between the VM's.</p> <p> ODL used for L2</p> <p> neutron-l3-agent for L3</p> <p> L2Gateway for VXLAN to VLAn conversion</p> <p> In such a setup, the external instance sends a ARP request to the VM in VXLAN, but the ARP response gets dropped. the Unknown unicase needs to be handled.</p> <p>To solve this issue, we can resort to ARP flooding, which may have performance impacts.</p> <p>the solution currently planned is to add a metaflow (learn action) that will send the packet back to the tunnel. </p> <p>we are adding this support for Boron (SR1)</p> <p>scenario:<br/> Openstack configured to use vxlan tunnels for VM instacnes and external Host connected to OVS using VXlanGateWay.</p> <p> VXlanGateWay provides similar functionality like L2Gateway feature in openstack.Trying to reach openstack Vm instance from external Host.</p> <p>problem:<br/> when external Host sending a ARP request to the VM in openstack and it was reached the VM, Then openstack VM sent ARP reply but it is dropped in OVS.</p> <p>solution:<br/> The Unknown unicast needs to be handled.<br/> To solve this issue, we can resort to ARP flooding, which may have performance impacts.The solution currently planned is to add a metaflow (learn action) that will send the packet back to the tunnel. we are adding this support for Boron (SR1)</p> <p>The fix has been proposed.<br/> <a href="https://git.opendaylight.org/gerrit/#/c/45744/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/45744/</a></p> <p>Legacy NetVirt is deprecated.</p> Development External issue ID 6474 External issue URL Rank 0|i01plb: