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61200214L1-1 IQ Probe User Manual 3
Chapter 1. Introduction
This header information contains a virtual circuit address known
as a DLCI (data link connection identifier). The header informa-
tion also contains bits used for network congestion control.
Frame relay virtual circuits may be defined as permanent (PVC)
or switched (SVC). PVCs have the same DLCI for a given path
each time a user protocol session is established. The network
service provider assigns these DLCIs at subscription time. SVCs,
on the other hand, have DLCIs dynamically assigned each time a
user protocol session is established. The CPE equipment must
request a call and the DLCI is assigned by the network switching
equipment. This DLCI is valid until the call is disconnected and
may be assigned a different value each time a call is requested.
SNMP MANAGEMENT
SNMP management capability is provided in-band with support
for RFC 1315 (frame relay DTE MIB), RFC 1213 (MIB II), and
ADTRAN Enterprise MIB. MIB files are available from
ADTRAN in the support section of the ADTRAN Web page at
www.adtran.com. TELNET capability is also supported. For
non-TCP/IP environments, VT 100 and front panel operation are
supported.
The IQ Probe's embedded SNMP feature allows the unit to be
accessed and controlled by a network manager in-band at the
DTE or DCE interface, out-of-band at the control port via SLIP or
async PPP, or using a LAN connection.
The term SNMP broadly refers to the message protocols used to
exchange information between the network and the managed
devices, as well as to the structure of network management data
bases. The three basic components of SNMP follow:
Network Manager
Control program that collects, controls, and presents data
pertinent to the operation or management of the network
devices. It resides on a network management station.