by Jeff Allen

These two graphs show a routing instability in peer1's network which caused traffic to swing over to peer2's network. The names have been changed to protect the innocent. This is an example of how graphs from RRD Tool (in this case, created using Cricket) can show behavior of a network (automatic failover and recovery) that's otherwise hard to visualize.

Jeff is also the Author of Cricket the most popular frontend to RRDtool.