Vijay Vasudevan, Sudipta Sengupta, and Jin Li
1 April 2009
Many enterprise networks have grown far beyond a single
large site to span tens to hundreds of branch offices across the globe, each
connected over VPNs or leased lines. With the emergence of the globallyconnected
enterprise and the trend towards enterprise all-IP convergence,
including transitioning the enterprise PBX to VoIP servers, IP-based audio/
video conferencing for telepresence has challenged the notion that
bandwidth is abundant in the enterprise. We take a first look at media
conferencing traffic in the global enterprise and, by instrumenting measurement
of call quality and network statistics, we quantify the impact
on call quality for a range of factors in the enterprise, such as wired vs.
wireless access, inter- vs. intra- branch office communication, QoS mechanisms
like VLAN tagging and DiffServ DSCP marking, and VPN vs.
public Internet access.
In Passive and Active Measurement Conference (PAM'2009)
Publisher Springer Verlag
All copyrights reserved by Springer 2007.