This paper describes a series of measurements about the characteristics of a reserved controlled-load flow in a simple router network at the presence of excessive background traffic, which was forwarded on a best-effort basis via a common link between two routers. Results concerning the delays and packet loss of the controlled-load flow are discussed and compared to those of the best-effort flow. The tests were carried out according to the simple evaluation criteria given in the RFC specifying the controlled-load service. A quite reasonable performance was measured, roughly satisfying the goals of the controlled-load service. Yet, the presence of background traffic introduced a clear increase in the average level of the network delay of the reserved flow, and also resulted in a larger jitter, which could be intolerable to inelastic traffic.
[1]
Henning Schulzrinne,et al.
RTP: A Transport Protocol for Real-Time Applications
,
1996,
RFC.
[2]
Lixia Zhang,et al.
Resource ReSerVation Protocol (RSVP) - Version 1 Functional Specification
,
1997,
RFC.
[3]
John Wroclawski,et al.
The Use of RSVP with IETF Integrated Services
,
1997,
RFC.
[4]
John Wroclawski,et al.
Specification of the Controlled-Load Network Element Service
,
1997,
RFC.
[5]
Scott Shenker,et al.
Integrated Services in the Internet Architecture : an Overview Status of this Memo
,
1994
.