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SNMP Commands

134 StreamLine™ SL8500 Modular Library System User's Guide • March 2007

Revision K • 96154

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Secure Hash Algorithm (SHA-1/SHA)—A popular one-hash algorithm used to 

create digital signatures; it is more secure, but slightly slower than MD5 (see also 

“Message Digest 5”). (Source: The Internet Society, RFC 3174)

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Trap/Notification—A message that reports a problem, error, or significant event that 

occurred within the device. 

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Trap Level String—The list of trap levels that will be filtered (see 

). The maximum length is 31 alphanumeric characters.

SNMP Commands

SNMP offers commands that follow a simple request/response exchange to 

communicate between the manager and the agent.

The manager issues request such as:

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A request for information of a specific variable.

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 A 

request for the next specific variable.

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A request

 

to change the value of a specific variable.

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The agent responds with:

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Get-Response: A response to the manager’s 

Get

 and 

GetNext

 commands.

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The agent sends out asynchronous events:

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An asynchronous message to the recipients about an event.

SNMP “walks” are also functional. Refer to the SNMP software documentation for 

additional information.

Access Control

Because community strings provide a form of access control in SNMP, StorageTek’s 

embedded agent will not rely on the so-called “private” community string in order to 

accept changes to the library’s configuration. The MIB can be viewed with v3/v2 

get/getnext. The library properties can only be changed with the v3 set command.

Using an administrative password provides access control and authorization for 

Set

 

operations. Consequently StorageTek’s embedded agent uses only one community 

string for both 

Get

 and 

Set 

operations.

Traps however, can be sent to recipients using v2c/v3-based PDUs. Different 

community strings can be specified while adding entries to the Trap Recipient List.