OpenBSD 6.1-beta (GENERIC.MP) #0: Tue Mar 14 00:27:49 CET 2017
    [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP

The problem:
ifconfig pppoe0 does not show the remote point-to-point IPv6 address:

pppoe0: flags=208851<UP,POINTOPOINT,RUNNING,SIMPLEX,MULTICAST,AUTOCONF6> mtu 
1492
[...]
        status: active
        inet6 fe80::20d:b9ff:fe41:568%pppoe0 ->  prefixlen 64 scopeid 0x9
        inet 87.153.150.156 --> 62.155.246.171 netmask 0xffffffff

A packet capture on the underlying interface shows that the address
was negotiated:

15:55:18.626923 00:0d:b9:41:05:6a 20:4e:71:68:51:f4 8864 36: PPPoE-Session
        code Session, version 1, type 1, id 0x0025, length 16
        IPV6CP: Configure-Request, Interface-ID=020d:b9ff:fe41:0568
15:55:18.643277 20:4e:71:68:51:f4 00:0d:b9:41:05:6a 8864 56: PPPoE-Session
        code Session, version 1, type 1, id 0x0025, length 16
        IPV6CP: Configure-Request, Interface-ID=0100:0100:3e9b:f6ab
15:55:18.643296 00:0d:b9:41:05:6a 20:4e:71:68:51:f4 8864 36: PPPoE-Session
        code Session, version 1, type 1, id 0x0025, length 16
        IPV6CP: Configure-Ack, Interface-ID=0100:0100:3e9b:f6ab
15:55:18.820100 20:4e:71:68:51:f4 00:0d:b9:41:05:6a 8864 56: PPPoE-Session
        code Session, version 1, type 1, id 0x0025, length 16
        IPV6CP: Configure-Ack, Interface-ID=020d:b9ff:fe41:0568

So I would exepect a line like

        inet6 fe80::20d:b9ff:fe41:568%pppoe0 -> fe80::100:100:3e9b:f6ab%pppoe0

I don't know if this is a problem with ifconfig(8), or sppp(4), or
elsewhere in the network stack.

-- 
Christian "naddy" Weisgerber                          [email protected]

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