User Documentation

User Manual Managed Switches
53
SHA-Auth
Authentication will be based on the HMAC-SHA
algorithms. 8-character passwords are the minimum
requirement for authentication.
No
User Data Encryption Key (for SNMP V1, V2c, V3 and V3 only)
Setting
Description
Factory
Default
Enable
Enables data encryption using the specified data
encryption key (between 8 and 30 characters).
No
Disable
No data encryption
No
3.3.2 Trap Settings
SNMP traps allow an SNMP agent to notify a Network Management System (NMS) of a significant
event. The switch supports two SNMP modes, Trap mode and Inform mode.
SNMP Trap Mode “Trap”
In Trap mode, the SNMP agent sends an SNMPv1 trap PDU to the NMS. No acknowledgment is sent
back from the NMS so the agent has no way of knowing if the trap reached the NMS.
SNMP Trap Mode “Inform”
SNMPv2 provides an inform mechanism. When an inform message is sent from the SNMP agent to
the NMS, the receiver sends a response to the sender acknowledging receipt of the event. This
behavior is similar to that of the get and set requests. If the SNMP agent does not receive a response
from the NMS for a period of time, the agent will resend the trap to the NMS agent. The maximum
timeout time is 300 sec (default is 10 sec), and the maximum number of retries is 99 times (default is
3 time). When the SNMP agent receives acknowledgement from the NMS, it will stop resending the
inform messages.