Identifier

The name of the tunnel endpoint. If an authenticated L2TP tunnel is to be established between two devices, the entries 'Identifier' and 'Hostname' need to cross match.

SNMP ID:
2.2.35.1 
Telnet path:
Setup > WAN > L2TP-Endpoints
Possible values:

Max. 16 characters from [A-Z][0-9]@{|}~!$%&'()+-,/:;<=>?[\]^_.