I need to find out whether it is possible to peer with two ISPs for advertising a public range using different metrics. Also what about if the IP range ( let's say 220.127.116.11/28) does not belong to the customer but to ISP1. Can the ISPs provide a fail-over type of set up in that scenario ..? Apologise I am not very familiar with BGP and your response is much appreciated !!!
before you own the public IP range, you would need to have ur own AS number ( so no private AS).
When u have the above, u can then have 2 peering sessions and full redundancy from ISPs. in fact you can go further and decide which you wish to have as primary, and which woudl be ur backup.