The value of tmnxEventPrimaryRoutePref specifies the
primary routing preference for traffic generated for
SNMP notifications and syslog messages.
A value of 'inband' specifies that the Logging utility will
attempt to use the Base routing context to send SNMP
notifications and syslog messages to remote destinations.
A value of 'outband' specifies that the Logging utility will
attempt to use the management routing context to send SNMP
notifications and syslog messages to remote destinations.
If the remote destination, as specified by tmnxStdDestAddr
or tmnxSyslogTargetAddr, is not reachable via the routing
context specified by tmnxEventPrimaryRoutePref, the secondary
routing preference as specified by tmnxEventSecondaryRoutePref
will be attempted.