Supposing to have IBGP to one ISP (to avoid assigning of
independent AS) and EBGP to the second ISP, again will
my router announce the /24 inside of the first ISP
address block to the EBGP peer ??
Interesting approach. In general, the ISPs I know would
be reluctant to run iBGP with a customer, unless they had
total control of all BGP speakers. If I understand you
correctly, the enterprise would have to tag its
advertisements to the second ISP with the ASN of the
first, since the enterprise doesn't have its own. Again,
I think most ISPs would be reluctant to give up this
amount of control.