Cisco BPX-BXM-155-8DX Installation And Configuration Manual page 613

L
A Label Controlled ATM interface is a MPLS (Multiprotocol Label Switching) interface where labels
LC-ATM Interface
are carried in the VPI/VCI bits of ATM cells, and where VC (virtual circuit) connections are
established under the control of MPLS (Multiprotocol Label Switching) control software.
Each interface card in a BPX has a certain number of Logical Connection Numbers. A Logical
LCN
Connection Number is used for each cross connect leg through the card in question. "LCN" is often
roughly synonymous with "cross connect leg". In VSI temrinology, an LCN is an example of an Other
End Reference.
The logical connection used to represent an individual routing entity.
LCON
An IGX data front card that supports up to 8 synchronous or asynchronous data ports. When used with
LDM (Low Speed
Data Module) an LDI4/DDS, an LDP can provide 56-Kbps Digital Data Service (DDS) interfaces to the IGX switch.
Connects a user device to a service interface, for example, a router to an AUSM card, a data line to a
line
data card, a frame relay line to an FRP or a port concentrator, or a T1 or E1 line to a CDP card.
link The network connection between two nodes.
The protocol and procedures for control of frame relay connections. Used for configuration, flow
LMI (Local
Management control, and maintenance of these connections.
Interface)
A frame relay addressing convention that uses the DLCI to identify the frame relay port at the
local addressing
interface between the user device and the frame relay network. In local addressing, a particular DLCI
is used only at the local FR connection. The DLCI may be reused at any other node in the network.
local alarm An alarm indicating that the associated T1 line is down due to a local failure of its receive path.
An utility bus (LB/0 or LB/1) located on the midplane, which provides the electrical connections
local bus
between various front and back cards. For example, the front and back cards of the Low Speed Data
PAD group (LDP and LDI) plug into this utility bus.
Each physical interface and every virtual trunk endpoint on a platform is represented to the VSI
Logical Interface
controllers as a different logical interface with partitions, and other VSI configuration. Logical
Interface numbers are 32-bit with a format which is, in general, known only to the platform.
A frame relay circuit consisting of either 1, 6, 24 (T1,) or 31 (E1) contiguous DSO's on a T1 or E1
logical port
physical port.
Label Switching router, which is an MPLS (Multiprotocol Label Switching) router.
LSR
M
A local or remote failure that is affecting operation of the network.
major alarm
Maximum number of cells which may burst at the PCR but still be compliant.
MBS (Maximum
Burst Size)
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Cisco BPX 8600 Series Installation and Configuration
Glossary
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