http://gallery.rrod.net/dokuwiki/ 2012-05-21T01:48:01+01:00 http://gallery.rrod.net/dokuwiki/ http://gallery.rrod.net/dokuwiki/lib/tpl/default/images/favicon.ico text/html 2011-10-09T15:27:05+01:00 http://gallery.rrod.net/dokuwiki/doku.php?id=checking_layer_2&rev=1318170425&do=diff This page references the Simple Network 1 sample network. If a system is unable to communicate with an IP address that should be on an attached network; the issue may be to do with the Layer 2 connectivity: * Is the Layer 2 link physically OK? * Are you connected to the device and port you think you are? * Are you in the correct VLAN (or other domain)? * Are you being filtered/firewalled? * If you have multiple ports, are they wired the right way round? * If there are redundant pat… text/html 2011-09-13T14:50:18+01:00 http://gallery.rrod.net/dokuwiki/doku.php?id=failed_redundant_paths_at_layer_3&rev=1315921818&do=diff As packets pass over the Internet (or a large internal network) between source and destination networks; they may end up passing through multiple paths -- that is not every packet necessarily ends up going the same way. If a path fails, the equipment around it should automatically stop using it -- however, sometimes this doesn't happen. text/html 2011-09-13T14:36:08+01:00 http://gallery.rrod.net/dokuwiki/doku.php?id=start&rev=1315920968&do=diff A collected experience. Introduction * Target Audience * Definitions -- Including standard networks referenced throughout the book * Tools Unsorted * Checking Layer 2 * Failed Redundant Paths at Layer 3 text/html 2011-09-10T15:55:58+01:00 http://gallery.rrod.net/dokuwiki/doku.php?id=target_audience&rev=1315666558&do=diff This book is targeted at people with a solid understanding of TCP/IP and IP routing already. It will not teach you about netmasks or ports. The examples in this book usually assume Linux, unless otherwise stated. However, the principles should carry over to other Operating Systems.