On 30/07/2009, at 7:59 AM, Jim Wininger wrote:
I have a question about the subnet size for BGP peers. Typically when we
turn up a new BGP customer we turn them up on a /29 or a /30. That seems to
be the "norm".
We connect to many of our BGP peers with ethernet. It would be a simple
matter to allocate a /24 for connectivity to the customer on a shared link.
This would help save on some address space.
My question is, is this in general good or bad idea? Have others been down
this path and found that it was a bad idea? I can see some of the pothols on
this path (BGP session hijacking, incorrectly configured customer routers
etc). These issues could be at least partially mitigated. Are there larger
issues when doing something like this or is it a practical idea?
What is your access network? Do you have a switch port per customer? If so, look in to private VLANs on Cisco, or whatever similar feature exists for your vendor. -- Nathan Ward