Hi all,

    short info - we have two ASNs running JunOS 19.4. Even Juniper officially supports RFC 8950 from 17.3R1 on MX and 20.1R1 on QFX (https://lists.ix-f.net/hyperkitty/list/rfc8950@lists.euro-ix.net/message/GV2M2UQTY2BP5C25YJAXABRVSBBX3BNP/) those networks are struggling to get RFC8950 enabled.

    Juniper announces "enhanced next-hop" capability, however receiving an IPv4 prefix with two next-hops (local-link and global) will tear down the BGP session. The logged message says "bad nhop len: 32 for afi 1, safi 1" - clearly not expecting two next-hops. I do not have any Juniper to test with and this sounds like an incompatibility with RFC 8950 where both next-hops are expected as per:

What are your thoughts on a problem like this?

Marian

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Marian Rychtecký

NIX.CZ, z.s.p.o.

Mahlerovy sady 2699/1

130 00 Praha 3

Česká republika / Czech Republic