Abstract: A first network probe is associated with a first end-point of a first router. The first network probe detects, by filtering packets coming from or going to the first router, a communication tunnel between the first end-point and a second end-point of a second router. The first network probe deduces an address of a second network probe associated with the second end-point, by applying a bijective translation function relative to an address of the second end-point retrieved from the filtered packets. Inter-probe communications are set-up between the first and second network probes, using the deduced address of the second network probe, and data traffic in the communication tunnel is jointly monitored by the first and second network probes.

Abstract: A first network probe is associated with a first router and with a first end-point of the first router, and a second network probe is associated with a second router and with a second end-point of the second router. The first network probe periodically injects flag packets in parallel to the traffic of a communication tunnel between the first and second end-points, with each flag packet including timestamp information expressing a time reference for the injection of the flag packet. Information relating to a timing variation in traffic in the communication tunnel is gathered, with the timing variation being measured due to a difference between the timestamp information contained in the flag packets and timestamp information relating to the instant the flag packets were captured by the second probe. Possible congestion situations experienced by the communication tunnel are assessed as a function of the gathered information.

Abstract: A first network probe is associated with a first end-point of a first router. The first network probe detects, by filtering packets coming from or going to the first router, a communication tunnel between the first end-point and a second end-point of a second router. The first network probe deduces an address of a second network probe associated with the second end-point, by applying a bijective translation function relative to an address of the second end-point retrieved from the filtered packets. Inter-probe communications are set-up between the first and second network probes, using the deduced address of the second network probe, and data traffic in the communication tunnel is jointly monitored by the first and second network probes.

Abstract: A first network probe is associated with a first router and with a first end-point of the first router, and a second network probe is associated with a second router and with a second end-point of the second router. The first network probe periodically injects flag packets in parallel to the traffic of a communication tunnel between the first and second end-points, with each flag packet including timestamp information expressing a time reference for the injection of the flag packet. Information relating to a timing variation in traffic in the communication tunnel is gathered, with the timing variation being measured due to a difference between the timestamp information contained in the flag packets and timestamp information relating to the instant the flag packets were captured by the second probe. Possible congestion situations experienced by the communication tunnel are assessed as a function of the gathered information.