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PRELIMINARY Chapter 9: Technical Reference
Megabit Modem 500L Installation Manual 59
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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.
Megabit Modem 500L supports the following MIBs:
• RFC 1213: "Management Information Base for Network Management of TCP/IP-Based
Internet: MIB-II" Supported groups: system, interfaces, IP, ICMP, UDP, and SNMP
groups.
• RFC 1215: "A Convention for Defining Traps for Use with the SNMP" Supported groups:
ColdStart, linkUp, linkDown, and authenticationFailure traps. Link status traps are sent for
events related to Ethernet.
• ADSL MIB
• ATM MIB
• PairGain Agent MIB
• PairGain Tiger MIB
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 39 for the example on how to
configure a DNS address).
TFTP SERVER
Trivial File Transfer Protocol (TFTP) is a standard for file transfer. It provides the service with
minimal capability and minimal overhead. TFTP uses UDP for connectionless delivery.