KRT: Error sending route 192.168.x.x/32 to kernel: File exists

[Bernd Naumann]

Hi Viktor,

It's just a guess, but maybe re-enable `protocol direct` and add 
`interface "*";` so all device routes are known to bird?
And also adding `interface "lo0" { stub yes; };` to OSPF?

Good luck,
Bernd

On 20.01.21 06:00, Victor Sudakov wrote:
> Dear Colleagues,
> 
> My system is full of the following messages:
> 
> bird[59366]: KRT: Error sending route 192.168.246.1/32 to kernel: File exists
> bird[59366]: KRT: Error sending route 2001:470:ecba:2::1/128 to kernel: File exists
> bird[57195]: KRT: Error sending route 2001:470:ecba:4::1/128 to kernel: File exists
> vas bird[57195]: KRT: Error sending route 192.168.170.0/24 to kernel: Address already in use
> 
> (as you see, these are not only host routes, but network routes as well).
> 
> They seem harmless but clog the log. Why is Bird trying to install those
> routes? Is there an extraneous export or import statement somewhere? Or
> should I just quelch those warnings and forget?
> 
> Here is my config with comments removed (bird2 2.0.7_1, FreeBSD 12.2),
> and the kernel IPv4 route table below it.
> 
> 
> log syslog all;
> 
> router id 192.168.246.1;
> 
> protocol device {
> 	scan time 10;
> }
> 
> protocol direct {
> 	disabled;
> 	ipv4;
> 	ipv6;
> }
> 
> protocol kernel kernel4 {
> 	ipv4 { export all; };
> }
> 
> protocol kernel kernel6 {
> 	ipv6 { export all; };
> }
> 
> protocol static {
> 	ipv4;
> }
> 
> protocol ospf v2 ospf4 {
>   	ipv4 { import all; export all;};
> 	area 0 {
> 		interface "re*" {
> 			cost 10;
> 		};
> 		interface "bridge*" {
> 			cost 10;
> 		};
> 	};
> }
> protocol ospf v3 ospf6 {
>   	ipv6 { import all; export all;};
> 	area 0 {
> 		interface "re*" {
> 			cost 10;
> 		};
> 		interface "bridge*" {
> 			cost 10;
> 		};
> 	};
> }
> 
> $ netstat -rn -finet
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags     Netif Expire
> default            192.168.170.1      UG1         re1
> 127.0.0.1          link#3             UH          lo0
> 192.168.89.0/27    192.168.170.1      UG1         re1
> 192.168.170.0/24   link#2             U           re1
> 192.168.170.5      link#2             UHS         lo0
> 192.168.246.0/24   link#4             U       bridge0
> 192.168.246.1      link#4             UHS         lo0
> 
>