Requirements imposed by NW mgmt.
10+ subscribers, 10,000+ publishers
very high event rates (10,000s / sec)
mostly small event sizes (one KB at most)
subscription changes are infrequent (e.g., new admin.)
complex subscription languages (causality, (real) time)
notification rate up to 1000+ / sec (event storm)
reliable notification semantic required
notification propagation via NW mgmt protocols (e.g., SNMP, CMIP)
real time constraints may be required