Red Hat Bugzilla – Bug 1567934
[Netvirt] IPv6 NA packet is sent out with wrong solicited flag
Last modified: 2018-10-18 03:20:13 EDT
Description of problem: ODL IPv6 Service supports Neighbor Discovery for Router interfaces. A Neighbor Solicitation (NS) packet may contains IPv6 Source Address as one of the following :: --> Unspecified SLL --> Source Link Local Address When NS packet is punted to the ODL controller, it will prepare the Neighbor Advertisement (NA) packet and it will send this NA to NS initiated nodes. NA packet contains IPv6 Destination Address and it has to be appropriately set. FF02::1 --> All node multicast IP address (FLAGS: R:1, S:0, O:1) Dest_LLA --> Destination LLA taken from NS (FLAGS: R:1, S:1, O:1) It is seen that ODL controller is setting Solicited Flag=1 for All node multicast IPv6 address, which is creating issues in IPv6 connectivity. Version-Release number of selected component (if applicable): ODL Oxygen release How reproducible: Always Steps to Reproduce: 1. Create an IPv6 neutron tenant network and associate it with the router. 2. Spawn a VM on that network. 3. Verify that VM successfully acquires an IPv6 address. 4. Now try to ping6 to the neutron router interface. Actual results: Sometimes ping6 to neutron router interface fails. Expected results: Ping6 to neutron router interface should be successful.
Checked with: opendaylight-8.0.0-9.el7ost.noarch Ensured ping6 to the router's interface Also checked traffic on the tap of the VM: fa:16:3e:33:0c:ae > 33:33:00:00:00:01, ethertype IPv6 (0x86dd), length 110: fe80::f816:3eff:fe33:cae > ff02::1: ICMP6, router advertisement, length 56
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHEA-2018:2086