BGP return traffic issu

[rah_91kumbhar]

Hello Experts

we discuss about BGP return traffic issue is comes

actually i have 3 ISP links it is connceted on single router
i have adverties only one ip public pool ex. 103.205.x.x/24

ISP 1 =20 mb ----active
ISP 2 =4 mb ---- passive
ISP 3 =4 mb ---- passive

in this situation my IN traffic it will come 20 mb
but my retun direction traffic it has been come to 4 mb ISP 2

i want to my return traffic will be come to 20mbps
i try to put AS-Path prepend on but still traffic has come to 4 mbps

what to do please help me

Thanks in avd

[Georg Pauwen]

Hello,

have you tried local preference on your router ? Post the config, you might be missing something...

[rah_91kumbhar]

Yes, i have put local pref 

ISP 1 = 300

ISP 2= 200 

ISP 3=150 

create two prefix-list 

ip prefix-list DEFAULT_ROUTE: 1 entries
seq 5 permit 0.0.0.0/0
ip prefix-list PREFIX_OUT: 1 entries
seq 5 permit 103.205.x.x/24

also Route map 

route-map ALL_PREFIX_OUT permit 10
match ip address prefix-list PREFIX_OUT

route-map ISP1_IN permit 10
match ip address prefix-list DEFAULT_ROUTE
set local-preference 300
route-map ISP2_IN permit 10
match ip address prefix-list DEFAULT_ROUTE
set local-preference 200
route-map ISP3_IN permit 10
match ip address prefix-list DEFAULT_ROUTE
set local-preference 150

it is correct my prefix-list and route-map 

[Georg Pauwen]

Hello,

try and connfigure the default preference as below:

R1
bgp default local-preference 200

R2
bgp default local-preference 150

R3
bgp default local-preference 100

[paul driver]

Hello

actually i have 3 ISP links it is connected on single router

In this scenario I wouldn't use LP

As this is only one router connecting to 3 EBGP isp peers, use the weight attribute for outgoing traffic section.
This weight attribute is locally significant and has an higher path selection than the Local preference.

router bgp xx
neighbor ISP1 weight 50000
neighbor ISP2 weight 40000
neighbor ISP3 weight 30000

res
Paul