local address as next-hop

[Alexander Demenshin]

Hi,

When next-hop specified as a local address, bird 2 produces a warning 
like:

2018-04-15 18:34:31.136 <WARN> Next hop address 192.168.100.100 is a 
local address of iface routers

and the route itself is installed as "unreachable".

Is there any reason for this? It is completely legal under linux, 
according to iproute2 documentation:

via ADDRESS
   the address of the nexthop router. Actually, the sense of this field 
depends on the route type.
   For normal unicast routes it is either the true next hop router or, if 
it is a
   direct route installed in BSD compatibility mode, it can be a local 
address of the interface.
   For NAT routes it is the first address of the block of translated IP 
destinations.

-- 
With best regards,
Alexander.