[isp-bgp] Suggested solution to prevent my prefixes from being suppressed (fwd)

[mmostafa@...]

Dear colleagues , 
we are an ISP served by two international links
from the same international ISP ( Dual homed AS ) . 
Our inbound traffic policy is to use one link as the main link and the
other as a backup , implemented by advertising our prefixes which is 
registered to my organization with two diffrenet communities and our ISP 
manuplate the downstream traffic via Local prefernce . 
We are suffering from a sequence of DDOS attacks targeting our ips , causing 
one of the two running BGP sessions with our international provider to flap 
3 or 4 times  each time we are subjected to such attacks that results in a 
massive degradation in our downstream traffic due to route flap damping . 
I have a suggested soltion that i will be gatefull if you advise me if there 
is any reasons makes it unfeasible or if there are any drawbacks which is : 
1-we advertise 3 ip blocks to our international ISP through both links , i 
will break each block into 2 more specific contigouse components , hence my 
international ISP edge routers will have 2 copies of 6 more specific 
compnents with diffrent LP , then i will ask my ISP to aggregate them back 
to the original 3 bloocks and suppress more specific components plus keeping 
the AS path information as its in form of AS-SET . 
Your advise is highly appreciated 
Best Regards
Mostafa Ali 
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