Trying  to make a  check list  for  troubleshooting  common BGP issues .  The list is as follows.  Configuration issues : 1.  Incorrect MD52.  Incorrect peer ASN, IP  Runtime issues : 1.  Path flap 2.  Path hijack  Would like to grow this  list with appropriate pointers and details.  Or, if anyone is aware of  such such a list's existence , would be glad to added to that .