This page describes possible options of implementing QoS guarantees on Ethernet circuits in Geant network. We investigated two possible options. First options is to use the OTN layer to provision the circuit through the backbone, this option will be further described in section 1. Second option are MPLS-TE tunnels over IP/MPLS layer and will be described in section 2.

Use of the OTN layer

TODO: add OTN solution description MHY 

This chapter will describe the deployment of CCS over the OTN layer in Geant network. 

OTN CCS should provide the guaranteed QoS for GTS testbed's links. In order to do so, one OpenNSA instances needs to be deployed over the OTN switch in each GTS location plus over each intermediate switch between GTS locations in the Geant OTN topology. Unlike in IP/MPLS where LSPs creates virtual full mesh, in OTN network the OpenNSA has to configure each OTN switch along the circuit patch, not only devices where circuit terminates. OpenNSA will then configure each OTN switch participating on the circuit as well as handle the time slots assignment based on requested bandwidth. Minimal (and also default, when no bandwidth is specified) bandwidth of one circuit will be 1.25 Gbps. This is also a granularity of possible settings.  

In order to provide VLAN delineated circuits OTN devices in GTS locations have to be equipped by line cards supporting L2 features. (Possibly PXM cards for DTN-X platform.)

GTS data plane requirements per location.

Use of the MPLS-TE

Nemanja Ninković TODO: - Describe the QoS configuration for junipers we prepared (shaping and policing on client ports and BW reservation on LSPs; provide upgraded configlets; // Basically copy in content from documentation we already have and imroove it + plus add the brief description of possibilities with current line cards deployed in geant (consult Niall if needed)// )