On Fri, 27 Feb 2004, Brian (Mushkin) wrote: > 68.217.104.24/30 (255.255.255.252)
This is a block of 2 usable addresses. > 68.217.104.16/29 (255.255.255.248) This is a block of 6 usable addresses. > 68.217.104.64/27 (255.255.255.224) This is a block of 30 usable addresses. > When I set an alias for 68.217.104.16 - 255.255.255.248, I get a warning > message saying "IP Address is Network Address". Then my Inbound Tunnels This is correct behaviour. Refer to http://support.algx.net/cst/resource/subnet.html for a good subnet cheatsheet. When subnetting, you "loose" the first and last addresses in the block. These are "network" and "broadcast" numbers used behind the scenes in the TCP/IP protocals. To use your example, 68.217.104.16/29, you have available the following addresses: 68.217.104.17 68.217.104.18 68.217.104.19 68.217.104.20 68.217.104.21 68.217.104.22 With 68.217.104.16 and 68.217.104.23 used for the network and broadcast addresses. The previous subnet started with the 68.217.104.8 address, the next subnet starts with 68.217.104.24, which is also yours as a /30, so you have two addresses available in that range: 68.217.104.25 68.217.104.26 You should avoid assigning broadcast and network addresses to hosts. ...david -- David Raistrick Systems Administrator - Global Technology Associates, Inc [EMAIL PROTECTED] Disclaimer: All opinions expressed are the opinions of David Raistrick, not necessarily those of GTA, Inc. ------------------------------------------------------ To unsubscribe: [EMAIL PROTECTED] For additional commands: [EMAIL PROTECTED] Archive: http://archives.gnatbox.com/gb-users/
