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130 997-01530-01, Rev. C-25, Jan 2008
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This model makes adding additional products and maintaining compatibility a straightforward process.
Each additional product will be given a branch in the tree under enterprises.SymmetricomTtm.products.
For now, we have only enterprises.SymmetricomTtm.products.xlGps and
enterprises.SymmetricomTtm.products.nic56k.
Future products will take the form enterprises.SymmetricomTtm.products.product.XXX. Each product
will use enterprises.SymmetricomTtm.products.product.XXX as its system object identifier. Each product
will also define an enterprises.SymmetricomTtm.products.product.XXX.xxxTrap subgroup for the
definition of all enterprise specific traps that can be generated by that product.
Making additions to the XL-GPS product MIB is also a straightforward task with several caveats. The first
is that additions may be made but the object identifier and the semantics of existing objects may not be
altered. A likely place for additions is under the systemStatusDetail group as addition system objects are
defined.
Glossary of SNMP-Related Terms
Depreciation: In SNMP when an SNMP variable or group of variables is no longer recommended for
use, they are listed as deprecated in the formal definition of the MIB. Users are often times still allowed
to use this data, but the MIB’s authors for one reason or another no longer recommend it.
Enterprise MIB: See Private Enterprise MIB.
IANA - Internet Assigned Number Authority: This is the group at IETF that is in charge of assigning
Internet related numbers like Ethernet addresses, TCP/UDP port numbers and SNMP Private Enterprise
MIB numbers.
IETF – Internet Engineering Task Force: The group responsible for standardizing numerous Internet
communication protocols.
Management agent: An Internet connected remote host that accumulates the raw data that is entered
into the MIB and Enterprise MIB for that host. This data is at some point transmitted to a Management
station. In other network applications this would be called a network server of the SNMP protocol.
Management station: An Internet connected remote host that consumes SNMP data provided by a
Management agent for the display of human network managers. In other network applications this would
be called a client of the SNMP protocol.
MIB – Management Information Base: This is the data structure for the SNMP protocol. The current
version of this standard, that is in general use, is MIB II defined by RFC’s 1213 and 1212.
NTP – Network Time Protocol: A network time distribution protocol developed at the University of
Delaware under the direction of Dr. Mills. NTP is a client / server based protocol where the server is the
supplier of time and the client is the consumer of the time information.
Private Enterprise MIB: SNMP allows private organizations to define their own MIB extensions. The
IANA of the IETF issues, for a fee, a unique number to an organization that is an address entry point
from the MIB II into the private data for that organization. Only one Enterprise address is assigned to an
organization. The Enterprise address for Symmetricom is 1896. This address space has grown to over