Hello,

I'm doing BGP IPv6 peering with my fibre provider.

I can reach their Ipv6 PtP address, but their router (an Alcatel Lucent) is announcing the PtP address as default gateway. This is marked as unreachable from my side.
Another peer, from the same provider but using a Juniper router, is announcing a remote link-local address. This is marked as reachable and successfully routes my WAN interface.

How can I overcome this problem? Is there a way to make the PtP gateway reachable?

The router is a CCR1036-12G-4S with RouterOS v6.38.1.

Here's the IPv6 route list. Thank you!

I think I nailed it.

The provider handled me a /127 PtP address. I found on another topic that this prefix isn't supported on Mikrotik as default gateway. I changed the address with a /64 and it worked perfectly.

Yeah, I've found it works also using the actual /127 address and mask and then using the "link-local%interface" on the default route.