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Configuring SNMP v1/v2c Community

For SNMPv1/v2c, access to an SNMP server by an SNMP client is governed by a proprietary SNMP community table that identifies those communities that have read-only, read-write, or administrative permission to the SNMP MIB stored on a particular server.

When an SNMP server receives a request, the server extracts the client’s IP address and the community name. The SNMP community table is searched for a matching community. If a match is found, its access list name is used to validate the IP address. If the access list name is null, the IP address is accepted. A nonmatching community or an invalid IP address results in an SNMP authentication error.

Each entry in the community table identifies:

An SNMP community name
A user’s privilege level
An IP access list

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