Perfect, that will do what i want. Thank you.

But will it not be better to have that setting on an in-filter per route basis?

On MIKROTIK BGP / OSPF you do that on a per route basis, so you can do some fancy things like "if routes learned from peer 1 set src to x.x.x.x, if learned from peer 2 set src to y.y.y.y".

2018-01-15 9:36 GMT+01:00 Alexander Zubkov <green@qrator.net>:

Hi,

You can set krt_prefsrc when exporting to kernel in Linux.


On Mon, Jan 15, 2018 at 8:49 AM, Michael Rack <mail@michaelrack.de> wrote:

Hi all!

Is it possible to set the SRC-Attribute on routes that will be inserted to kernel?

I have private /31 networks to connect to other routers in my network and i don't want to see these private ip-addesses on a traceroute from a network with public ips. Every Router have a public IP-Address on his Loopback-Interface, so i can use that address for ICMP-Replies.

Lets say 78.22.45.0/24 and 78.22.46.0/24 is my public network address space.

router#1.lo = 78.22.46.1/32

router#1.eth1 = 10.0.0.1/31

 ----- eBGP -----

router#2.eth1 = 10.0.0.2/31

router#2.eth2 = 78.22.45.1/24

router#1.lo = 78.22.46.2/32

On traceroutes i like to reply from a specific ip-address. In case of router#1 with 78.22.46.1 and for router#2 with 78.22.46.2

On Unix / Linux you can accomplish that feature with

router#1# ip route add 78.22.45.0/24 via 10.0.0.2 src 78.22.46.1

So how can i set "src" with bird on import route filtering process?