[CAUSE] The tmnxIsisMaxSeqExceedAttempt notification is generated when the sequence number on an LSP wraps the 32 bit sequence counter, we purge and wait to re-announce this information. Since these should not be generated rapidly, we generate an event each time this happens. A possible cause could be that the same system-id is configured on multiple nodes; when 2 nodes have the same system-id they both keep incrementing its LSP sequence number causing the sequence counter to rollover. While the first 6 bytes of the LSPID are ours, the other two contain useful information. [EFFECT] No effect. [RECOVERY] No recovery is necessary.
Sources for this description
Nokia networking MIB copies (LibreNMS/Observium Community)