Multicast

Project homepage: http://www.cesnet.cz/tf-ngn/multicast

Support pages

• Outline
• Contributors needed (MS Windows, BSD, ...)

Bulk data transfers via reliable multicast

• redundant coding approach, no feedback from listeners
• software distribution, GRID
• software prototype

Multicast beacon tests

• Nine beacons are currently operational, the server accessible freely at http://zma.ten.cz:8378.
• Software available for download here.

Nice features

• New beacons may be added at any time
• HTTP interface

Problems

• Java: Java RTE required; the server doesn't work under JavaVM 1.3.0
• missing features (graphs for delay and jitter in the viewer)
• no history available
• no authentication

Further work

• Resolve the Java problems with the server
• Set up an "official" beacon infrastructure
• Representative set of beacons - one in each Géant PoP?
• Advertise the service
• Try to address the deficiencies

Multicast & MPLS

• Multicast not supported natively
• Multicast packets come unlabelled to the P routers
• RPF check fails
• Cisco GSR doesn't support GRE tunnels
• Solutions (ugly): MBGP on the P routers, using only shared tree, ???