Cisco Cisco SG200-26P 26-port Gigabit PoE Smart Switch Manuel De Maintenance

SNMP Overview

Cisco Small Business SF200E Series Advanced Smart Switch

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The switch can be managed by using a combination of Management Information 
Base (MIB) variables, whose combined values represent all facets of the system 
state, and the SNMP protocol. SNMP can examine and modify the MIB values. The 
switch supports SNMPv1, SNMPv2, and SNMPv3. SNMPv1 and SNMPv2 define 
access through membership in communities that are ranges of IP addresses and 
associated read/write values. SNMPv3 uses a more secure access scheme by 
defining individual SNMP users and configuring the authentication and encryption 
protocols they use for access. The switch supports all versions simultaneously.

SNMP is disabled by default. To enable:

Click SNMP > Properties in the navigation wndow.

Click Enable for the SNMP Mode.

Click Apply. Your changes are saved to the running configuration. 

SNMPv3 employs the following features to provide secure management access to 
the switch:

•

Message integrity: Ensures that a packet has not been tampered with in 
transit. 

•

Authentication: Determines the message is from a valid source. 

•

Encryption: Scrambles the packet contents to prevent it from being seen by 
unauthorized sources. 

SNMPv3 authentication and encryption keys are generated based on the SNMP 
user passwords and an administratively-unique local engine ID that you can 
configure. 

To configure an engine ID:

Click SNMP > Properties in the navigation window.

Specify the engine ID as a concatenated, hexadecimal string. Each hexadecimal 
pair represents one byte and the pairs are contigious (not separated by a space, 
period, or colon). The range is 3–16 pairs.