On 04.08.2016 21:39, Andrew wrote: > Hello List, > > I work for a medium sized ISP. We are entering an agreement to rent > some IPv4 space from a local higher education institution. Being a > multi-homed ISP we would like to advertise the rented prefix from our > ASN. The prefix that will be advertised is a smaller subnet from the > higher educations block; they will continue to advertise the larger prefix. > > What is the best way to accomplish this? Is there any way of doing this > without having to tunnel the traffic through the origin ASN? > > I feel if we just adverse the prefix it get put on a bogon list for > prefix hijacking. This space is rented long term but they are not > interested in reassigning the space to us. They also want to keep > advertising their prefix as one contiguous block.
Make sure proper route-objects exist. Should be no big deal then imho. Others do it as well - also advertising the larger block from one ASN and a smaller portion of it from another. Kind regards, Stefan