Hi, I read the Halabi's book and RFC1966, still could not understand why without CLUSTER_LIST we may run into the problem of having routing loop inside the AS. According to the rule, RR should be full-meshed between all non-client neighbors, when a client route is redistributed to them by IBGP, these neighbors will not redistribute to others, except to its client if it is a RR also. So in which case we will receive the client route from outside of cluster? Am I missing something? Thanks, Jerry _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6807&t=6807 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]