An Experimental Study on the Effects of Outdated Control Information in GMPLS-Controlled WSON for Shared Path Protection
In Shared Path Protection, backup resources can be shared by multiple backup lightpaths as long as their respective working lightpaths are not affected by the same (single) failure event. This property is known as backup sharing among existing backup paths. The goal of this paper is to experimentally evaluate the impact of the traffic dynamics when the control information on resource sharing is either flooded by OSPF-TE or collected by RSVP-TE. In this paper, the authors consider three information dissemination strategies by the OSPF-TE routing protocol, comparing them when collecting shareable resource information by means of the standard or extended RSVP-TE signalling protocol. The three OSPF-TE dissemination approaches differ on the granularity of the disseminated TE link information.