the context
===========
We have a SRX650 (AS-1) and two providers (AS-2, AS-3). We have a static route defined to reach the AS-2 across an external router (R).
We have two ip range to advertise.
This is the config:
-------------------
routing-options {
static {
route 10.0.0.2/30 next-hop 10.0.0.2;
route 10.0.0.3/29 next-hop 10.0.0.3;
route 192.168.0.2/32 next-hop 10.0.0.3;
}
router-id 10.0.0.1;
autonomous-system 1;
protocols {
bgp {
traceoptions {
file analisis_bgp world-readable;
}
multihop {
ttl 255;
}
group ebgp_telecom {
type external;
import desde_bgp;
export para_bgp;
neighbor 10.0.0.2 {
peer-as 3;
}
}
group ebgp_telefonica {
type external;
import desde_bgp;
export para_bgp;
neighbor 192.168.0.2 {
peer-as 2;
}
}
}
}
policy-options {
policy-statement anteposicion {
term todas {
then as-path-prepend "28048 28048 28048 28048";
}
}
policy-statement balanceo {
from {
route-filter 209.13.97.33/32 exact;
route-filter 190.227.196.165/32 exact;
}
then {
load-balance per-packet;
}
}
policy-statement desde_bgp {
term full_table {
from protocol bgp;
then accept;
}
term martians {
from {
route-filter 10.0.0.0/8 orlonger;
route-filter 172.16.0.0/12 orlonger;
route-filter 192.168.0.0/16 orlonger;
}
then reject;
}
}
policy-statement para_bgp {
term export_pooles {
from {
route-filter 190.112.64.0/18 exact;
route-filter 200.91.32.0/21 exact;
}
then accept;
}
term otras {
from protocol local;
then reject;
}
term locales {
from protocol direct;
then reject;
}
}
}
the requirements
================
We need to balance our traffic through those ASs.
the problem
===========
The major traffic goes through AS-3 and only the 2.5% through AS-2. We had probed as-path-prepend, as-path-expand, multipath with an export in forwarding-table, statics routes to 0.0.0.0/0 using two next-hops (the AS-2 and AS-3 routers).
When I turn more preferable AS-2 the traffic across this AS is the 25% of the traffic when it goes through AS-3 and I can't reach some sites.
I'm working on that issue through months and can't find a resolution.
