VLSM , stands for variable length subnet mask This means that we are able to save on ip addresses by subnetting on existing classess we have . This is done via using a different mask usually a longer mask to map out more network addresses. Also if you use VLSM to design your ip network , make sure that you use routing protocols that support it . Examples are ospf, eigrp, bgp etc. whereas protocols like rip, igrp etc. does not support VLSM hope that helps a bit Jason -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Eddie Griffiths Sent: Tuesday, August 29, 2000 6:18 PM To: '[EMAIL PROTECTED]' Subject: VLSM Hello, Can anybody help me with understanding VLSM ?? I know about masking and subnet masking Iam nearly there with VLSM I just need some good explanations as to how VLSM is formed ?? and also is there some network diagrams or exmaples which explain VLSM a bit more clearly ?? Many Thanks, Eddie.. ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]