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1. (WO2019042593) A NETWORK ENTITY FOR PROVIDING AN AGGREGATED BIT RATE PACKET STREAM
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CLAIMS

1- A network entity (1) for providing an aggregated bit rate packet stream in a network element under supervision (11, 101) in a software defined network (SDN), the network entity (1) being destined to be connected to a first network element (101), the network entity (1) comprising:

a packet stream generator (3) configured to

generate a stream of packets having a generating bit rate,

send the stream of packets to the first network element (101),

a software network controller (2) configured to,

- configure the first network element (101) to iteratively pass the stream of packets to a second network element,

the second network element (9, 102) being configured to loop back the stream of packets to the first network element (101), until a packet of the stream of packets has been looped a determined number N of times from the first network element (101) to the second network element (9, 102).

2- A network entity (1) according to claim 1, wherein the network entity further comprises:

a packet stream monitor (8) configured to receive streams of packets from the first network element (101) or respectively the second network element (9, 102), wherein the software network controller (2) is further configured to

as a response to determining that a packet of the stream of packets has been looped a determined number N of times from the first network element (101) to the second network element (9, 102), configure the first network element (101) or respectively the second network element (9, 102) to pass the packet of the stream of packets to the packet stream monitor (8).

3- A network entity according to claim 2, wherein the software network controller (2) is further configured to :

determine a monitoring bit rate, wherein the monitoring bit rate is the bit rate of the stream of packets received by the packet stream monitor (8),

- compare the monitoring bit rate to the generating bit rate.

A network entity (1) according to claim 1, wherein the first network element is an upstream packet switch (101), the second network element is a downstream packet switch (102) connected to the upstream packet switch (101) by a network link (11) or a network (10), wherein the network element under supervision is the network link (11) or the network (10), wherein the stream of packets is passed through the network link (11) or the network (10) the determined number N of times.

5- A network entity (1) according to claim 1 , the second network element is a high-speed loopback plug (9) connected to a port of the upstream packet switch (101), wherein the high-speed loopback plug (9) is configured to loop back a packet stream received from a port of the upstream packet switch (101) to the port of the upstream packet switch (101), wherein the network element under supervision is the upstream packet switch (101).

6- A network entity (1) according to claim 1, the software network controller (2) is further connected to the second network element (102), and wherein the software network controller (2) is further configured to control the second network element (102) in order that the second network element (102) is configured to pass back the stream of packets to the first network element (101), until a packet of the stream of packets has been passed a determined number N of times from the first network element (101) to the second network element (102).

7- A network entity (1) according to claim 1, wherein the software network controller (2) is further configured to, prior to control the first network element (101) to pass the stream of packets to the second network element (102), control the first network element (101) to set a loop counter in header tags of the packets of the stream of packets.

8- A network entity (1) according to claim 7, wherein the loop counter comprises a triggering limit, which is a function of the number N.

9- A network entity according to claim 1 , wherein the software network controller (2) is further configured to control the first network element (101) to replicate the packet stream into a replicated packet stream, and to send the replicated packet stream to the network element under supervision.

10- A method for evaluating the assumed bit rate of a packet switch network under test and/or for loading this packet switch network to an amount of traffic load, the method comprising:

generating a stream of packets having a generating bit rate,

sending the stream of packets to a first network element (101),

monitoring the first network element to iteratively pass the stream of packets to a second network element (102),

the second network element (102) being configured to loop back the stream of packets to the first network element, until a packet of the stream of packets has been looped a determined number N of times from the first network element to the second network element.

11- A method according to claim 10, further comprising:

- receiving streams of packets from the first network element (101) or respectively the second network element (9, 102), and

- as a response to determining that a packet of the stream of packets has been looped a determined number N of times from the first network element (101) to the second network element (9, 102), passing the packet of the stream of packets to the packet stream monitor (8).

12- A method according to claim 11, further comprising:

determining a monitoring bit rate, wherein the monitoring bit rate is the bit rate of the stream of packets received by the packet stream monitor (8),

comparing the monitoring bit rate to the generating bit rate.

13- A method according to claim 10, further comprising:

-passing back the stream of packets to the first network element (101), until a packet of the stream of packets has been passed a determined number N of times from the first network element (101) to the second network element (102).

14- A method according to claim 10, further comprising:

setting a loop counter in header tags of the packets of the stream of packets.

15- A method according to claim 10, further comprising:

replicating the packet stream into a replicated packet stream, and to send the replicated packet stream to the network element under supervision.