>That's easy you can give your client one CIDR block >and have him advertised this CIDR block to you. You >will not have to do anything as you could have >aggregrated the CIDR block supernet and advertised it >to your upstream providers like Sprint , AT&T etc. > > >regards, > >suaveguru
But if you hide the customer block in your aggregate, and the other provider advertises only the more specific block, all the traffic will go via the other provider unless the other provider is down. For multihoming to work, you need to advertise both the aggregate and the more-specific, while the other provider advertises the more-specific of your address space. It's also a good idea that all of these policies are recorded in a routing registry. Otherwise, other providers may generate filters that do not consider the multihoming structure. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=30947&t=30620 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
