I'm not sure I understand the question entirely. When you say A can't ping D's loopback, have you tried an extended ping? :-{)] -Mark A. Morenz, MS Ed, CCNA, CCAI Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=15817&t=15796 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]