Operations Manual
5
Management
Information
Base Protocols
The following Management Information Bases (MIBs) are supported. An
expanded discussion of selected MIB support is provided in Appendix C.
❑ SNMP MIB2 (RFC 1213)
❑ Ethernet MIB (RFC 1643)
❑ Bridge MIB (RFC 1493)
❑ SNMP MIB2 (RFC 1573)
❑ ATM MIB (RFC 1695)
❑ ATM Forum ILMI
❑ LANE Client
❑ ATM Switch
❑ ATM Bridge
❑ ATM Forum Address
❑ ATI Private MIB Extensions
LAN Emulation In general, LAN Emulation allows you to define a network by the software
configuration instead of rearranging physical cables.
ATI’s LAN Emulation solution is based on ATM Forum LAN Emulation
v.1.0. which consists of two parts: a LAN Emulation Client (LEC) and a LAN
Emulation Service. That is, v.1.0 states that each network must include all
LAN Emulation Services which, in turn, is composed of an LAN Emulation
Configuration Server (LECS), a LAN Emulation Server (LES) and a
Broadcast and Unknown Server (BUS).
Virtual Circuits ATM is a connection-oriented technology. This means that a call or virtual
connection needs to be established between at least two stations before data
can be transferred.
A Switched Virtual Circuit (SVC) automatically establishes this connection
by signalling, a process similar to a telephone call involving call set-up,
connection and disconnection. With SVC’s, virtual channels are established
and terminated for each session.
SVC is established by sending a call request message to the network. For
example, Virtual Channel Connections (VCCs) between LE Clients and
between an LE Client and LE Servers use SVCs — the connection is
established when needed and disconnected when it is not.
The advantage of SVC’s over Permanent (or Provisioned) Virtual Circuits
(PVC’s) is straightforward. SVC’s permit a “logical” or non-dedicated “on
demand” channel connection. A PVC is analogous to a leased or dedicated real
circuit.
The bottom line is that SVC’s permit dynamic networks. They allow any
device attached to the network to ask for connection — and permit the
network to open connections on the fly — without manual intervention.
