They have quite a few uses, loopbacks can be used in routing protocols to specify router id, or as the destination of an unnumbered serial interface. Null interfaces can be used to black hole traffic that you don't want forwarded, also packets that get routed to a null interface aren't shown as unreachable. Is there something specific you had in mind?
-----Original Message----- From: Mark Latis [mailto:[EMAIL PROTECTED]] Sent: Monday, November 19, 2001 10:45 AM To: [EMAIL PROTECTED] Subject: Loopback and Null interfaces [7:26703] What is the purpose of the Loopback and the Null interfaces ? (I know that the loopback interface can be used to emulate an always-on interface to be used for point-topoint unnumbered links ) Thanks, Mark Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26722&t=26703 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
