Active monitoring of delays with asymmetric routes - Inria - Institut national de recherche en sciences et technologies du numérique Access content directly
Reports (Research Report) Year : 2005

Active monitoring of delays with asymmetric routes

Joanna Moulierac
Miklos Molnar


There is an increasing interest in network monitoring recently. Indeed, knowledge of link characteristics is of significant importance in order to provide efficient routing. In this paper, we consider active network monitoring of link delays in a Service Provider or Enterprise IP network using round trip delays. Our proposition guarantees that all links are monitored contrary to previous propositions. Indeed, previous propositions assume symmetric routing in networks when placing the monitoring stations. With this assumption, round trips may be different when routes are asymmetric and link delays are not significant. We say that links are not monitored in this case. Previous propositions do not monitor 5.76% of links in average and 10% in worst cases during our simulations while we monitor always 100% of links. Moreover, in our proposition, the amount of traffic is reduced and the measures are more precise since the distance from a monitoring station (beacon) to the edges is limited by a given bound. Indeed, probe messages use short paths, traverse less routers and less links with our proposition. Finally, the number of beacons is not increased compared to the previous heuristic and so the installation and maintenance costs are minimized.


Other [cs.OH]
Fichier principal
Vignette du fichier
RR-5635.pdf (255.19 Ko) Télécharger le fichier

Dates and versions

inria-00070372 , version 1 (19-05-2006)


  • HAL Id : inria-00070372 , version 1


Joanna Moulierac, Miklos Molnar. Active monitoring of delays with asymmetric routes. [Research Report] RR-5635, INRIA. 2005, pp.16. ⟨inria-00070372⟩
165 View
73 Download


Gmail Facebook Twitter LinkedIn More