Abstract: Event logging methods and systems for communication networks are provided. Events associated with particular communication sessions are logged responsive to detection of any of a plurality of event logging triggers which have been established for the communication sessions. Per-session event logging according to embodiments of the invention may provide improved event logging functions for communication network fault or error analysis by enabling enhanced trigger-based event logging control and logging of a wide range of events, including standards-based signalling messages, at network elements throughout a communication network.