Snmp Versions - Cisco Catalyst 2960 Software Configuration Manual

Understanding SNMP
The stack master handles the SNMP requests and traps for the whole switch stack. The stack master
transparently manages any requests or traps that are related to all stack members. When a new stack
master is elected, the new master continues to handle SNMP requests and traps as configured on the
previous stack master, assuming that IP connectivity to the SNMP management stations is still in place
after the new master has taken control.
For more information about switch stacks, see
These sections contain this conceptual information:
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SNMP Versions

This software release supports these SNMP versions:
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Both SNMPv1 and SNMPv2C use a community-based form of security. The community of managers
able to access the agent's MIB is defined by an IP address access control list and password.
Catalyst 2960 and 2960-S Switches Software Configuration Guide, Release 15.0(1)SE
30-2
SNMP Versions, page 30-2
SNMP Manager Functions, page 30-3
SNMP Agent Functions, page 30-4
SNMP Community Strings, page 30-4
Using SNMP to Access MIB Variables, page 30-5
SNMP Notifications, page 30-5
SNMP ifIndex MIB Object Values, page 30-6
SNMPv1—The Simple Network Management Protocol, a Full Internet Standard, defined in
RFC 1157.
SNMPv2C replaces the Party-based Administrative and Security Framework of SNMPv2Classic
with the community-string-based Administrative Framework of SNMPv2C while retaining the bulk
retrieval and improved error handling of SNMPv2Classic. It has these features:
SNMPv2—Version 2 of the Simple Network Management Protocol, a Draft Internet Standard,
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defined in RFCs 1902 through 1907.
SNMPv2C—The community-string-based Administrative Framework for SNMPv2, an
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Experimental Internet Protocol defined in RFC 1901.
SNMPv3—Version 3 of the SNMP is an interoperable standards-based protocol defined in RFCs
2273 to 2275. SNMPv3 provides secure access to devices by authenticating and encrypting packets
over the network and includes these security features:
Message integrity—ensuring that a packet was not tampered with in transit
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Authentication—determining that the message is from a valid source
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Encryption—mixing the contents of a package to prevent it from being read by an unauthorized
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source.
To select encryption, enter the priv keyword. This keyword is available only when the
Note
cryptographic (encrypted) software image is installed.
Chapter 7, "Managing Switch Stacks."
Chapter 30 Configuring SNMP
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