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/OVSDB-160 ovsdb <p>in ovsdb net-virt, neutron will provide an ip as the next-hop default gateway<br/> for connections beyond br-ex.</p> <p>Since ovsdb has no real arp, it needs a service in can subscribe so that the<br/> mac address associated to the gateway ip address is available.</p> <p>Today, that mac is hard coded via the config param 'ovsdb.l3gateway.mac', provided in custom.properties file.</p> <p>Operating System: All<br/> Platform: All</p> OVSDB-160

ovsdb netvirt needs help in getting mac for a given ip in br-ex

Bug Resolved Done Anil Vishnoi Flavio Fernandes Tue, 26 May 2015 18:58:24 +0000 Sun, 11 Oct 2015 16:02:31 +0000 Sun, 11 Oct 2015 16:02:31 +0000 unspecified openstack.net-virt 0 2 <p>&gt; Flavio,<br/> &gt; Is the issue here lack of service to get gateway ip from custom.properties?<br/> &gt; How do you see it implemented? Are there similar services that I can look as template?</p> <p>I think it is mostly a missing functionality. In openstack, the mac of the external gateway is never provided via neutron. That<br/> makes sense, since it assumes the sdn controller has an ip stack that could derive the mac from the ip.</p> <p>My rough idea is that the net-virt code in ovsdb would subscribe to something in odl, that could to the arp and notify back should<br/> the mac that is associated with the given ip changes. I imagine it would be something similar to the ping tutorial <span class="error">&#91;1&#93;</span>, but with focus on the<br/> mac. Maybe by looking at /proc/net/arp file.</p> <p>— flavio</p> <p><span class="error">&#91;1&#93;</span>: <a href="https://git.opendaylight.org/gerrit/#/c/7249/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/7249/</a><br/> <a href="https://wiki.opendaylight.org/view/Ping_2.0_-_Discover_and_Model_Plugin" class="external-link" target="_blank" rel="nofollow noopener">https://wiki.opendaylight.org/view/Ping_2.0_-_Discover_and_Model_Plugin</a></p> <p>just a ref on something that we can copy/leverage for this:</p> <p><span class="error">&#91;09:19:54&#93;</span> &lt;alagalah&gt; flaviof: Have a look at the OfOverlay Renderer, specifically the EndpointManager class... there is an ArpTasker, essentially we use packet in packet out</p> <p><span class="error">&#91;09:22:26&#93;</span> &lt;alagalah&gt; flaviof: Yeah so when you make a subnet tied to an external network with floatingIP range say 50-100 with gateway 253, which is say a Cisco router on the LAN, it arps for 253 using packet out/in and then removes the packet in flows after it gets the ARP and caches it</p> <p><span class="error">&#91;09:22:37&#93;</span> &lt;alagalah&gt; flaviof: Have a look at ArpTasker in EndpointManager class</p> <p><span class="error">&#91;09:23:09&#93;</span> &lt;flaviof&gt; alagalah: cool!</p> <p>Log snippet:<br/> 2015-07-13 02:31:32,034 | INFO | ntDispatcherImpl | NeutronL3Adapter | 268 - org.opendaylight.ovsdb.openstack.net-virt - 1.1.1.SNAPSHOT | Trigger MAC resolution for gateway ip 192.168.202.1 on Node Uri <span class="error">&#91;_value=ovsdb://uuid/4575bb26-b73b-4e0a-a62a-9b3ff06e19af/bridge/br-ex&#93;</span><br/> 2015-07-13 02:31:32,034 | INFO | ntDispatcherImpl | GatewayMacResolverService | 269 - org.opendaylight.ovsdb.openstack.net-virt-providers - 1.1.1.SNAPSHOT | Trigger Mac resolution for gateway 192.168.202.1, using source ip 192.168.202.133 and mac FA:16:3E:B2:27:83<br/> 2015-07-13 02:31:33,040 | INFO | pool-44-thread-2 | NeutronL3Adapter | 268 - org.opendaylight.ovsdb.openstack.net-virt - 1.1.1.SNAPSHOT | Resolved MAC address for gateway IP 192.168.202.1 is 52:54:00:5b:ba:a6</p> <p>gerrit stable/lithium: <a href="https://git.opendaylight.org/gerrit/#/c/24276/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/24276/</a></p> <p>gerrit master: ?!?</p> <p>master : <a href="https://git.opendaylight.org/gerrit/25205" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/25205</a></p> <p><a href="https://git.opendaylight.org/gerrit/#/c/25205/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/25205/</a><br/> <a href="https://git.opendaylight.org/gerrit/24276" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/24276</a></p> Development External issue ID 3378 External issue URL Issue Type ODL SR Target Milestone Rank 0|i0210n: