EDS-508A/505A Series User’s Manual
Featured Functions
3-24
User Auth. Type (for SNMP V1, V2c, V3 and V3 only)
Setting
Description
Factory Default
No-Auth
Use admin account or user account to
access objects. No authentication.
No
MD5-Auth
Provides authentication based on the
HMAC-MD5 algorithms. 8-character
passwords are the minimum requirement
for authentication.
No
SHA-Auth
Provides authentication 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
8-character data encryption key is the
minimum requirement for data encryption
(maximum of 30 characters)
No
Disable
No data encryption
No
Trap Settings
SNMP traps allow an SNMP agent to notify the NMS of a significant event. The EDS-508A/505A
supports two SNMP modes,
Trap
mode and
Inform
mode.
SNMP Trap Mode
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 Inform Mode
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 doesn’t 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 secs (default is 1 sec), and the maximum number of retries is 99 times (default
is 1 time). When the SNMP agent receives acknowledgement from the NMS, it will stop resending
the inform messages.