Methods, nodes and computer readable media for tunnel establishment per slice

A control node, comprising:

• a communication interface arranged for communication with a controlled node,
• at least one processor, and
• a memory including instructions which, when executed by the at least one processor, cause the control node to:
• parse a slice profile which defines slice requirements of at least one slice;
• compute, according to the slice profile, a result of logical topology for each slice on a physical topology composed by controlled nodes;
• generate splitting information for indicating a controlled node to split a physical port into at least one logical port for each slice and constraints of the at least one logical port for each slice, based on the computed result;
• and
• transmit, via the communication interface, the computed result, the splitting information and the constraints for each slice to the controlled node,
• wherein based at least on the computed result a routing policy is applied to control routes advertisement between neighbouring controlled nodes to control a list of virtual private network ‘VPN’ routes contained in each slice.

A method in a controlled node, comprising:

• receiving, from a control node, a computed result of logical topology for each slice on a physical topology composed by controlled nodes under control of the control node, and splitting information and constraints for each slice, wherein the computed result is computed according to a slice profile which defines slice requirements of at least one slice, the splitting information and the constraints for each slice are respectively generated based on the computed result, and the splitting information indicates the controlled node to split a physical port into at least one logical port for each slice;
• splitting a physical port into at least one logical port for a slice based on the received splitting information;
• associating the at least one logical port for the slice with a slice container;
• applying the constraints for the slice on the at least one logical port;
• generating a routing table for the slice based on the received computing result and the constraints;
• and
• computing at least one tunnel according to the routing table for the slice based on the slice requirements of the slice,
• wherein based at least on the computed result a routing policy is applied to control routes advertisement between neighbouring controlled nodes to control a list of virtual private network ‘VPN’ routes contained in each slice.

A controlled node, comprising:

• a communication interface arranged for communication,
• at least one processor, and
• a memory including instructions which, when executed by the at least one processor, cause the control node to:
• receive, from a control node, a computed result of logical topology for each slice on a physical topology composed by controlled nodes under control of the control node, and splitting information and constraints for each slice, wherein the computed result is computed according to a slice profile which defines slice requirements of at least one slice, the splitting information and the constraints for each slice are respectively generated based on the computed result, and the splitting information indicates the controlled node to split a physical port into at least one logical port for each slice;
• split a physical port into the at least one logical port for a slice based on the received splitting information;
• associate the at least one logical port for the slice with a slice container;
• apply the constraints for the slice on the at least one logical port;
• generate a routing table for the slice based on the received computed result and the constraints;
• and
• compute at least one tunnel according to the routing table for the slice based on the slice requirements of the slice,
• wherein based at least on the computed result a routine policy is applied to control routes advertisement between neighbouring controlled nodes to control a list of virtual private network ‘VPN’ routes contained in each slice.