Monitoring Multicast on a Global Scale
NOTE: Mantra has not been actively maintained since 2003. The information regarding Mantra is mirrored here for historical purposes.
Mantra (Monitor and Analysis of Traffic in Multicast Routers) is a tool for monitoring
various aspects of multicast at the router level. The results from Mantra are aimed to
depict the snapshots of various constituents of the multicast infrastructure from the
point of view of the router/s that we are monitoring. These snapshots, presented in
several different modes, form the basis (and the main objective!) of this site. Results
presented here are updated every 15-30 minutes. A list of publications related to Mantra
is available in the section
If you are interested in participating
in Mantra please look at the section "Participation in Mantra"
|General Monitoring Statistics:
- Status of Multicast
Tables for a quick look at the latest statistics and the Top 10 Lists; i.e. "most
populous groups", "busiest hosts", "RP's advertising most SA's" etc.
- Session and Membership Monitoring
Statistics about the usage of multicast and the membership patterns across entire
multicast infrastructure visible to Mantra.
- mroute and Traffic Monitor
Mroute monitoring involves analyzing characteristics of multicast routing table. On the other hand,
traffic monitoring involves measuring the bandwidth usage and packet flow statistics for traffic
through the routers that we monitor.
Multicast Usage in Last 24 Hours
- MBGP Monitor
Statistics about the characteristics of multicast routing. MBGP state
captured from various routers form the basis of analysis here.
- MSDP Monitor
Statistics about the characteristics of the MSDP-SA (Source Active) messages. Due to the
Same-SA-State-Everywhere nature of MSDP, these results (theoretically)
*Global* usage statistics for multicast.
- Usage of GLOP Address Space
Statistics about the usage of multicast-address space in 233/8. GLOP is
the multicast-address allocation policy for allocating a unique 233/24 address block to each AS.
- Usage of SSM Address Space
Statistics about the usage of multicast-address space in 232/8.
Multicast Routing in Last 24 Hours
Visualization of local as well as global views of the MBGP topology. These
visualizations also include display of monitoring statistics like the origin of MSDP messages are
topological locations of session participants over the topology maps. Some interesting archived
snapshots of the topology are also available in this section.
- Geographic Monitoring
Interactive visualization of the geographic placement of important constituents of
multicast infrastructure like participant-hosts, MBGP networks, DVMRP networks, RP's etc. The views
presented here are not current and the IP-to-Geo mapping is not
100% accurate. However, these views present a very good estimate for multicast deployment across
A Snapshot of the MBGP Topology
Other Tools for Monitoring Multicast
|Acknowledgements: Mantra is an ongoing
project in collaboration with the wonderful folks at CAIDA
and Networking and Multimedia Systems Lab, <http://imj.ucsb.edu/> at CS.UCSB . Special thanks to Kevin Almeroth (UCSB), k
claffy (caida), David Meyer (Cisco) and Bill Fenner (AT&T
Comments and Suggestions: Prashant