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Hello Soha,<div><br></div><div>Thank you. It works with 'ecmp off'.</div><div><br></div><div>One more thing I notice in Bird 2.15, is this warning message.</div><div>---</div><div><div>Kernel dropped some netlink messages, will resync on next scan.</div><div>ospfv3v6: Unexpected case in next hop calculation</div><div>ospfv3v6: Cannot find next hop for LSA (Type: 2001, Id: 0.0.0.0, Rt: 1.2.3.4)</div><div>ospfv3v6: Unexpected case in next hop calculation</div><div>ospfv3v6: Cannot find next hop for LSA (Type: 2001, Id: 0.0.0.0, Rt: 5.6.7.8)</div><div>ospfv3v6: Unexpected case in next hop calculation</div><div>ospfv3v6: Cannot find next hop for LSA (Type: 2001, Id: 0.0.0.0, Rt: 9.1.2.3)</div><div>--</div><div>Here's the simple topology.</div><div><br></div><div>Router A - Router B - Router C.</div><div><br></div><div><span style="font-size: 13.3333px">Router B got LSA information from from A and C, and install it in B' routing table.. and( I guess) forward it to its adjacent neighbor.</span><br></div><div><br></div><div>Router C does not install the LSA Information of Router A in OSPF Database and vice versa.</div><div><br></div><div>Thanks.</div><div class="mb_sig"></div><blockquote class="history_container" type="cite" style="border-left-style:solid;border-width:1px; margin-top:20px; margin-left:0px;padding-left:10px;">
<p style="color: #AAAAAA; margin-top: 10px;">On 11/03/2024 14:19:57, Soha Jin <soha@jin.sh> wrote:</p><div style="font-family:Arial,Helvetica,sans-serif">Hello Ilham,
<br>
<br>You can disable ECMP with `ecmp off;` in the protocol `ospfv3v6` as a workaround (if you don’t need ECMP).
<br>
<br>Since 31aa62ae6d2e111e87c08b4b27a16ead968f0689, OSPFv3 will use direct route for pointopoint interfaces. Unfortunately, kernel doesn’t support multipath with a device only route, so there is a ! on the route.
<br>
<br>BIRD v2.15 ready.
<br>bird> show route
<br>Table master4:
<br>192.88.99.0/24 unicast [ospf2 14:55:01.553] * I (150/20) [1.9.1.9]
<br> dev wg-main
<br> dev wg-main2
<br>
<br>Table master6:
<br>2001:db8:272::/48 unicast [ospf1 14:55:01.553] ! I (150/20) [1.9.1.9]
<br> dev wg-main
<br> dev wg-main2
<br>
<br>I am drafting a patch to fix it.
<br>
<br>Regards,
<br>Soha
<br>
<br>----------------------------------------------
<br>From: Bird-users <bird-users-bounces@network.cz> On Behalf Of Ilham Maulana
<br>Sent: Monday, March 11, 2024 12:27 PM
<br>To: Ondrej Filip <feela@network.cz>; Ondrej Zajicek via Bird-users <bird-users@network.cz>
<br>Subject: Re: BIRD 2.15
<br>
<br>Hello,
<br>
<br>After upgrading to 2.15, OSPFv3 is broken. Previously working on 2.14. No configuration changes.
<br>
<br>This capture taken from router with Bird 2.15 installed.
<br>
<br>--------------------------------
<br>OSPF route from router with Bird 2.15. it has ! sign.
<br>
<br>birdc show route all 2a05:abcd:abcd:abcd::/128
<br>BIRD 2.15 ready.
<br>Table master6:
<br>2a05:abcd:abcd:abcd::/128 unicast [ospfv3v6 2024-03-11 10:05:40] ! I (150/10) [1.1.1.1]
<br> dev wg6
<br> dev wg7
<br> Type: OSPF univ
<br> OSPF.metric1: 10
<br> OSPF.router_id: 1.1.1.1
<br>
<br>
<br>-----------------------------------------------------
<br>OSPF route from router with Bird 2.14, working as expected, with * sign.
<br>
<br>birdc show route all 2a05:abcd:abcd:abcd::3/128
<br>BIRD 2.15 ready.
<br>Table master6:
<br>2a05:abcd:abcd:abcd::3/128 unicast [ospfv3v6 2024-03-11 08:23:55] * I (150/10) [192.168.99.141]
<br> dev wg2
<br> Type: OSPF univ
<br> OSPF.metric1: 10
<br> OSPF.router_id: 192.168.99.141
<br>
<br>Any idea, what's going on?
<br>
<br>
<br></bird-users@network.cz></feela@network.cz></bird-users-bounces@network.cz></div></blockquote>
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