+++ This bug was initially created as a clone of Bug #1896898 +++ Description of problem: ovs-configuration.service when multiple IPv6 default routes are provided via RAs During deployment on one of the master nodes we get multiple IPv6 default routes over the same interface: ip -6 r show default default proto ra metric 101 nexthop via fe80::200:5eff:fe00:201 dev eno6 weight 1 nexthop via fe80::2e21:3101:b5e3:8f00 dev eno6 weight 1 nexthop via fe80::d207:ca01:b521:2700 dev eno6 weight 1 pref medium Trying to run manually the /usr/local/bin/configure-ovs.sh script we can see that it cannot find the default route as it's assuming only one: /usr/local/bin/configure-ovs.sh OVNKubernetes + rpm -qa + grep -q openvswitch + touch /var/run/ovs-config-executed + '[' OVNKubernetes == OVNKubernetes ']' + NM_CONN_PATH=/etc/NetworkManager/system-connections + iface= + counter=0 + '[' 0 -lt 12 ']' ++ ip route show default ++ awk '{if ($4 == "dev") print $5; exit}' + iface= + [[ -n '' ]] ++ ip -6 route show default ++ awk '{if ($4 == "dev") print $5; exit}' + iface= + [[ -n '' ]] + counter=1 + echo 'No default route found on attempt: 1' No default route found on attempt: 1 + sleep 5 Version-Release number of selected component (if applicable): quay.io/openshift-release-dev/ocp-release:4.6.3-x86_64 How reproducible: 100% Steps to Reproduce: 1. Deploy baremetal environment via IPI flow with IPv6 control plane. The nodes should receive multiple IPv6 default routes via RAs Actual results: ovs-configuration.service assumes a single IPv6 default route Expected results: ovs-configuration.service should handle multiple IPv6 default routes over the same interface Additional info:
Assigning to @mcornea since he verified the original bug
Verified this bug on 4.6.8 Deployed ipv6 cluster and check the ip route ip -6 r show default default via fe80::5054:ff:fed9:77d0 dev br-ex proto ra metric 800 pref medium
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 (Moderate: OpenShift Container Platform 4.6.8 security and bug fix update), 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/RHSA-2020:5259