During the 2016 MPLS WC conference in Paris, FR this past week we gave a demonstration of the Northstar TE ControllerTM learning, controlling and creating SPRING based Traffic Engineering LSPs across a Juniper Network. The Network consisted of seven Juniper vMX routers running ISIS and BGP.
The demonstration highlighted several pieces of technology and a number of Northstar’s existing applications such as:
Dynamic learning of SPRING Adjacency and Node SIDs via ISIS
Display of per Link Adjacency SIDs
Creation of SPRING TE LSPs via the Path Computation Protocol(PCEP)
Creation of diverse pairs of SPRING TE LSPs from different ingress routers using SRLG exclusion via the PCEP
It can be challenging to obtain optimal bin packing without significant network disruption and/or bandwidth over-booking when RSVP-TE LSPs are reserving bandwidth in a network in a PCE controlled network. A complex and involved process of make-before-break(MBB) LSP creation and LSP preemption is needed to optimize an existing network. Using Northstar's Zero-Bandwidth mode enables a PCE to route LSPs without considering the reservation style of the network or that a LSP set-up maybe rejected due to BW overbooking when a MBB operation is performed. This allows the PCE to optimize resource utilization more effectively and more aggressively thereby achieving greater network efficiency.
In a previous blog we were briefly introduced to a solution that enabled a packet-layer PCE to learn about the topology and link attributes of an under-lying transport layer network. This enables the packet-layer PCE to make more informed path computations by taking into account transport layer properties that would otherwise be hidden from the packet layer. In this blog, we will see the solution working, including several screen shots illustating the behavior, with a 3rd party transport system.