verified with following script: systemctl start openvswitch systemctl start ovn-northd ovn-nbctl set-connection ptcp:6641 ovn-sbctl set-connection ptcp:6642 ovs-vsctl set open . external_ids:system-id=hv1 external_ids:ovn-remote=tcp:20.0.48.26:6642 external_ids:ovn-encap-type=geneve external_ids:ovn-encap-ip=20.0.48.26 systemctl restart ovn-controller ovn-nbctl ls-add ls1 ovn-nbctl lr-add lr1 ovn-nbctl lrp-add lr1 lr1-ls1 00:00:00:00:00:01 172.16.1.1/24 ovn-nbctl lsp-add ls1 ls1-lr1 ovn-nbctl lsp-set-type ls1-lr1 router ovn-nbctl lsp-set-options ls1-lr1 router-port=lr1-ls1 ovn-nbctl lsp-set-addresses ls1-lr1 router ovn-nbctl lsp-add ls1 lnls1 ovn-nbctl lsp-set-options lnls1 network_name=provider ovn-nbctl lsp-set-type lnls1 localnet ovn-nbctl lsp-set-addresses lnls1 unknown ovn-nbctl set logical_router lr1 options:chassis=hv1 ovn-nbctl lrp-add lr1 lr1-ls2 00:00:00:00:00:02 172.16.1.2/24 ovn-nbctl lrp-add lr1 lr1-ls3 00:00:00:00:00:03 172.16.1.3/24 ovn-nbctl ls-add ls2 ovn-nbctl lsp-add ls2 ls2-lr1 ovn-nbctl lsp-set-type ls2-lr1 router ovn-nbctl lsp-set-options ls2-lr1 router-port=lr1-ls2 ovn-nbctl lsp-set-addresses ls2-lr1 router ovn-nbctl ls-add ls3 ovn-nbctl lsp-add ls3 ls3-lr1 ovn-nbctl lsp-set-type ls3-lr1 router ovn-nbctl lsp-set-options ls3-lr1 router-port=lr1-ls3 ovn-nbctl lsp-set-addresses ls3-lr1 router ovs-vsctl add-br br-test ip link set br-test up ovs-vsctl set open . external-ids:ovn-bridge-mappings=provider:br-test ip netns add server0 ip link add veth0_s0 netns server0 type veth peer name veth0_s0_p ip netns exec server0 ip link set veth0_s0 up ip netns exec server0 ip addr add 2001:1db8:3333::2/64 dev veth0_s0 ovs-vsctl add-port br-test veth0_s0_p ip link set veth0_s0_p up ip addr add 2001:1db8:3333::1/64 dev br-test ovn-nbctl set logical_router_port lr1-ls1 options:prefix_delegation=true ovn-nbctl set logical_router_port lr1-ls1 options:prefix=true #ovn-nbctl set logical_router_port lr1-ls2 options:prefix=true sleep 5 sed s/^iface.*/"iface \"veth0_s0\" {"/g -i /etc/dibbler/server.conf sed s/pd-pool.*/"pd-pool 2001:1db8:3333::\/80"/g -i /etc/dibbler/server.conf sed s/t1.*/"t1 10"/g -i /etc/dibbler/server.conf sed s/t2.*/"t2 15"/g -i /etc/dibbler/server.conf cat > /var/lib/dibbler/server-AddrMgr.xml <<EOF <AddrMgr> <timestamp>1575481348</timestamp> <replayDetection>0</replayDetection> </AddrMgr> EOF cat > /var/lib/dibbler/server-CfgMgr.xml <<EOF <SrvCfgMgr> <workDir>/var/lib/dibbler</workDir> <LogName>Server</LogName> <LogLevel>8</LogLevel> <InactiveMode>0</InactiveMode> <GuessMode>0</GuessMode> </SrvCfgMgr> EOF ip netns exec server0 dibbler-server run > dibbler.log & sleep 10 ovn-nbctl list logical_router_port lr1-ls1 ipv6_prefix is generated on ovn2.13.0-18.el8: + ovn-nbctl list logical_router_port lr1-ls1 _uuid : c0ba1af9-babb-43a8-aeb3-291b8e6d2603 enabled : [] external_ids : {} gateway_chassis : [] ha_chassis_group : [] ipv6_prefix : ["2001:1db8:3333::a080:0:0/96"] <=== generated ipv6_ra_configs : {} mac : "00:00:00:00:00:01" name : lr1-ls1 networks : ["172.16.1.1/24"] options : {prefix="true", prefix_delegation="true"} peer : [] + exit 0 [root@hp-dl380pg8-13 test]# rpm -qa | grep -E "openvswitch|ovn" ovn2.13-central-2.13.0-18.el8fdp.x86_64 openvswitch-selinux-extra-policy-1.0-23.el8fdp.noarch ovn2.13-host-2.13.0-18.el8fdp.x86_64 python3-openvswitch2.13-2.13.0-18.el8fdp.x86_64 openvswitch2.13-2.13.0-18.el8fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-common-1.0-7.noarch kernel-kernel-networking-openvswitch-ovn_ha-1.0-55.noarch ovn2.13-2.13.0-18.el8fdp.x86_64
verified on rhel7 version: + ovn-nbctl list logical_router_port lr1-ls1 _uuid : 20e4324a-cbec-4385-91bc-2c0dcf38fdfd enabled : [] external_ids : {} gateway_chassis : [] ha_chassis_group : [] ipv6_prefix : ["2001:1db8:3333::a1d:0:0/96"] ipv6_ra_configs : {} mac : "00:00:00:00:00:01" name : lr1-ls1 networks : ["172.16.1.1/24"] options : {prefix="true", prefix_delegation="true"} peer : [] [root@dell-per740-42 test]# rpm -qa | grep -E "openvswitch|ovn" openvswitch2.13-2.13.0-17.el7fdp.x86_64 openvswitch-selinux-extra-policy-1.0-15.el7fdp.noarch ovn2.13-2.13.0-18.el7fdp.x86_64 ovn2.13-host-2.13.0-18.el7fdp.x86_64 kernel-kernel-networking-openvswitch-ovn-common-1.0-7.noarch ovn2.13-central-2.13.0-18.el7fdp.x86_64
there are still some issues, reported buts to track: https://bugzilla.redhat.com/show_bug.cgi?id=1827084 https://bugzilla.redhat.com/show_bug.cgi?id=1826623 https://bugzilla.redhat.com/show_bug.cgi?id=1826683 https://bugzilla.redhat.com/show_bug.cgi?id=1826686 https://bugzilla.redhat.com/show_bug.cgi?id=1827090 so Verify this bug
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/RHBA-2020:2317