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Management Protocols
72 Megabit Modem 410F and 420F User Manual
MANAGEMENT PROTOCOLS
Simple Network Management Protocol (SNMP) is used to configure system and bridge
parameters, to monitor statistics, and to perform advanced management tasks.
SNMP
This management protocol specifies how to send information between a Network Management
System (NMS) and managed devices on a network. Managed devices run a program called an
agent. The agent interprets SNMP requests and responds to them. The NMS communicates with
the agents in the managed devices to:
• set configuration
• get configuration
• get status
A Management Information Base (MIB) defines the configuration and status parameters.
The Internet Engineering Task Force (IETF) specifies standard MIBs for certain types of
devices, ensuring any NMS can manage them. Additionally, vendors can issue proprietary
MIBs for their devices to fit specific needs.
MIB and Trap Support
Each managed device has configuration, status, and statistical information that defines its
functionality and operational capabilities. These elements make up the MIB for the device being
managed. The MIB defines the kind of information an NMS can retrieve from a managed
device, and the settings an NMS can control in a managed device. See “MIBs and Traps” on
page 77 for a listing of the MIBs and traps that the Megabit Modem 410F and 420F support.
DNS RESOLUTION
If you want Domain Name System (DNS) resolution, you need to specify the IP address for a
device to be the DNS resolver. You can also specify another IP address to designate a second
device for a secondary DNS resolver. The DNS device maps human-readable addresses to
IP addresses. A human-readable address is one such as maggie.copro.company.com
that contains a host name and domain. The DNS resolver maps that name to the IP address that
is a numeric (four octet) value such as 192.168.30.25 (see page 50 for the example on how to
configure a DNS address).