AS10888 was created to perform two functions:
The second function is performed by two routers provided by NASA: fixw-mbone.nsn.nasa.gov is part of the PIM-SM/MBGP/MSDP infrastructure in AS10888 and maew-mbone.nsn.nasa.gov is part of the DVMRP infrastructure. fixw-mbone advertises certain MBGP routes into DVMRP, and summarizes the entire DVMRP routing table into MBGP default. There is a PIM-DM tunnel between fixw-mbone and maew-mbone that runs "ip dvmrp unicast-routing".
This page monitors the PIM neighbor relationship between fixw-mbone and maew-mbone. Every 5 minutes, it queries fixw-mbone via SNMP to determine if it has maew-mbone listed as a PIM neighbor. If it does, the link is considered to have been up for those 5 minutes; if it does not, the link is considered to have been down. These graphs are the percentage uptime recorded.
Green is uptime; black is downtime. White reflects no data (which could mean downtime, or could mean a problem with the data collection). The yellow line is an exponentially weighted average with an alpha of .2 . It was an experiment to see if it would provide any useful info, but I don't think it does. I'm just waiting on Tobi to implement a longer-term linear average in rrdgraph =)
