Cisco Systems SG30052PK9NA Manual De Usuario

Creating SNMP Groups

453

Cisco Small Business 300 Series Managed Switch Administration Guide 

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Object ID Subtree—Select the node in the MIB tree that is included or 
excluded in the selected SNMP view. The options to select the object are as 
follows:

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Select from list—Enables you to navigate the MIB tree. Press the Up 
arrow to go to the level of the selected node's parent and siblings; press 
the Down arrow to descend to the level of the selected node's children. 
Click nodes in the view to pass from one node to its sibling. Use the 
scrollbar to bring siblings in view.

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User Defined—Enter an OID not offered in the Select from list option.

Select or deselect Include in view. If this is selected, the selected MIBs are 
included in the view, otherwise they are excluded.

Click Apply.

In order to verify your view configuration, select the user-defined views from the 
Filter: View Name list. The following views exist by default:

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Default—Default SNMP view for read and read/write views.

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DefaultSuper—Default SNMP view for administrator views.

Other views can be added.

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Object ID Subtree—Displays the subtree to be included or excluded in the 
SNMP view. 

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Object ID Subtree View Type—Displays whether the defined subtree is 
included or excluded in the selected SNMP view.

In SNMPv1 and SNMPv2, a community string is sent along with the SNMP frames. 
The community string acts as a password to gain access to an SNMP agent. 
However, neither the frames nor the community string are encrypted. Therefore, 
SNMPv1 and SNMPv2 are not secure. 

In SNMPv3, the following security mechanisms can be configured.

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Authentication—The device checks that the SNMP user is an authorized 
system administrator. This is done for each frame.