Hi all

It is issued that configure R6 to only accept prefixes from BB1 that have benn originated by themselves and their directly connected customers in question,
but SG is
ip as-path access-list 25 permit ^54(_[0-9]+)?$
router bgp 100
neighbor 54.1.3.254 filter-list 25 in.

I think that it is not to be able to accept prefixes from BB1.

Please help me if it it wrong.