Internet Cloud AS Path Prepend functionality Query

[FabianAllen]

Hi

Please find the attached Diagram for Reference:

We have our own APNIC pool which we have advertised to ISP-1 and ISP-2 as shown in diagram.

On ISR routers we are Advertising 1.1.1.0/24 to ISP-1 and ISP-2 via EBGP and receiving Default route on both ISR routers.

Issue: Majority of our inbound traffic is preferred via ISP-2, even after trying AS path Prepend still the same issue.

Since we have advertised the entire subnet to  ISPs  even though the traffic leave via ISP-1 preferred path is ISP2.

on my Lab its a straight forward with AS-path prepend is working fine.. but since ISR routers are connected to Service providers, how do I influence my Inbound traffic.. (Tried AS path prepend and not working)

I would like to make ISP-1 as primary and ISP-2 as Secondary

Please need your Guidance/Suggestions

Thanks

[Pedroxh]

Hi

Do you have the topology of this lab and the output CLI?

[paul driver]

Hello

Exact duplicate post with this -  Just a different OP name?

[MHM Cisco World]

Friend, 
AS prepend with private AS, some ISP use remove private and hence all your AS private with prepend will remove. 
can you try public AS, this make ISP not remove it "even if there is inter ISP".