Automatic autobandwidth allocation allows an MPLS tunnel to automatically adjust its bandwidth allocation based on the volume of traffic flowing through the tunnel. Bandwidth allocation is adjusted according to a specified time interval. At the end of the time interval specified at the [edit protocols mpls label-switched-path auto-bandwidth] hierarchy level, the current maximum average bandwidth usage is compared with the allocated bandwidth for the LSP. If the LSP needs more bandwidth, an attempt is made to set up a new path where bandwidth is equal to the current maximum average usage. If the attempt is successful, the LSP's traffic is routed through the new path and the old path is removed. If the attempt fails, the LSP continues to use its current path.
For more information on configuring autobandwidth, see the JUNOS MPLS Applications Configuration Guide.
Autobandwidth success and failure is logged in the output of the show mpls lsp extensive command. The following manual autobandwidth adjustment events are included in this section:
