On 26.3.2011 20:44, [email protected] wrote:
> Dear Bird Users.
>
> Just wanted to know if that is a working bird config and 1 more question.
>
> Scenario:
> I have an AS and 2x /24 (lets say 193.1.1.1 and 194.1.1.1) networks
> assigned to my as. Furthermore I have 2 uplink providers. AS1 and AS2.
>
> I want most of the traffic to go thru AS1. AS2 should act as backup
> uplink. My as is defined here as AS0.
>
>
I believe you config is almost OK.
>
> ---begin---
> router id 193.1.1.1;
> log "/var/pfad/bird.log
>
>
>
> protocol device { scan time 60;}
>
> protocol static static_bgp {
> import all;
>
> route 193.1.1.0/24 unreachable;
> route 194.1.1.0/24 unreachable;
>
<======= missing '}'
>
>
> protocol kernel{
> import all;
> export all;
> }
>
>
>
> ######################
> # FILERS DEF #
> ######################
> filter bgp_IN {
> if (net ~ [ 169.254.0.0/16+, 172.16.0.0/12+,
> 192.168.0.0/16+, 10.0.0.0/8+,
> 224.0.0.0/4+, 240.0.0.0/4+,
> 0.0.0.0/32-, 0.0.0.0/0{31,32}, 0.0.0.0/0{0,7} ];) then reject;
>
> accept;
> }
>
>
> filter bgp_OUT {
> if (net ~ [193.1.1.0/24, 194.1.1.0/24]) then accept;
> else reject;
> }
>
> filter bgp_OUT_P {
> if (net ~ [193.1.1.0/24, 194.1.1.0/24]) then {
> bgp_path.prepend(0); ---> My AS#
> bgp_path.prepend(0);
> bgp_path.prepend(0);
> accept; }
> else reject;
> }
> ######################
> # / FILERS DEF #
> ######################
>
>
> ######################
> # BGP CONF #
> ######################
>
>
>
> protocol bgp THRU_AS1 {
> local as 0;
> source adress 193.1.1.1;
> neighbor 1.1.1.2 as 1;
> default bgp_local_pref 100;
> path metric 0;
> default bgp_med 1;
> import filter bgp_IN;
> export filter bgp_OUT;
>
>
>
> }
>
>
> protocol bgp THRU_AS2 {
> local as 0;
> source adress 193.1.1.1;
> neighbour 2.2.2.3 as 2;
> default bgp_local_pref 200;
> path metric 0;
> default bgp_med 1;
> import filter bgp_IN;
> export filter bgp_OUT_P;
> }
>
>
> ---END of conf.---
>
> Would this work?
I hope so. I don't think these lines are necessary:
default bgp_local_pref 100;
path metric 0;
default bgp_med 1;
>
> Can someone show me how I could act as uplink for someone else?
I believe this addition/modification should do the job. Client's
network is C.C.C/24 and his/her IP is X.X.X.X etc.
protocol bgp CLIENT {
local as 0;
source adress A.A.A.A;
neighbour X.X.X.X as 7;
import filter CLIENT_IN;
export filter CLIENT_OUT;
}
filter CLIENT_OUT {
if source = RTS_BGP then accept;
if (net ~ [193.1.1.0/24, 194.1.1.0/24]) then accept;
reject;
};
filter CLIENT_IN {
if (net ~ [ C.C.C.0/24 ]) then accept;
else reject;
}
filter bgp_OUT_P {
if (net ~ [193.1.1.0/24, 194.1.1.0/24, C.C.C.0/24] ) then {
bgp_path.prepend(0); ---> My AS#
bgp_path.prepend(0);
bgp_path.prepend(0);
accept; }
else reject;
}
filter bgp_OUT {
if (net ~ [193.1.1.0/24, 194.1.1.0/24, C.C.C.0/24 ]) then accept;
else reject;
}
Ondrej
> What would I need to add in the config so AS7 is connected to my as and
> wants an uplink from me with full routing table ?
>
>
> Cheers in advanced,
> Victor
>
>
