Hi Guys, I know some of us are using EVPN and I think we are all doing it in slightly different ways. We are using IPV4 addresses on the loopback interface advertising via 2 link-local IPv6 to a spine switch
We added a new KVM node and after what we now know is around 4 hours bgp routes in FRR start to be rejected B>r 10.10.216.20/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 3d10h19m r via fe80::aa2b:b5ff:feb5:2a59, enp113s0f1, 3d10h19m B>* 10.10.216.21/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 01w4d22h * via fe80::aa2b:b5ff:feb5:2a59, enp113s0f1, 01w4d22h B>r 10.10.216.22/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 19:24:51 r via fe80::aa2b:b5ff:feb5:2a59, enp113s0f1, 19:24:51 B>* 10.10.216.30/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 01w4d22h * via fe80::aa2b:b5ff:feb5:2a59, enp113s0f1, 01w4d22h B>r 10.10.216.31/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 5d13h03m r via fe80::aa2b:b5ff:feb5:2a59, enp113s0f1, 5d13h03m B>r 10.10.216.32/32 [20/0] via fe80::aa2b:b5ff:feb5:20b3, enp113s0f0, 2d21h0 It turns out there seems to be an incompatibility issue between the kernel and FRR versions. We rolled back the kernel of this node and now it's working as intended. Bugged kernel - 3.10.0-1160.2.2.el7 Working kernel - 3.10.0-1127.19.1.el7 FRR version 7.2-01 At some point I will setup a test system to replicate and let the relevant communities know. I thought to raise it here for visibility in case other people are struggling with a similar issue. Thanks Adam Witwicki Disclaimer Notice: This email has been sent by Oakford Technology Limited, while we have checked this e-mail and any attachments for viruses, we can not guarantee that they are virus-free. You must therefore take full responsibility for virus checking. This message and any attachments are confidential and should only be read by those to whom they are addressed. If you are not the intended recipient, please contact us, delete the message from your computer and destroy any copies. Any distribution or copying without our prior permission is prohibited. Internet communications are not always secure and therefore Oakford Technology Limited does not accept legal responsibility for this message. The recipient is responsible for verifying its authenticity before acting on the contents. Any views or opinions presented are solely those of the author and do not necessarily represent those of Oakford Technology Limited. Registered address: Oakford Technology Limited, The Manor House, Potterne, Wiltshire. SN10 5PN. Registered in England and Wales No. 5971519
