Glossary
13
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
L
LC-ATM Interface
A Label Controlled ATM interface is a MPLS (Multiprotocol Label Switching) interface where labels
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.
LCN
Each interface card in a BPX has a certain number of Logical Connection Numbers. A Logical
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.
LCON
The logical connection used to represent an individual routing entity.
LDM (Low Speed
Data Module)
An IGX data front card that supports up to 8 synchronous or asynchronous data ports. When used with
an LDI4/DDS, an LDP can provide 56-Kbps Digital Data Service (DDS) interfaces to the IGX switch.
line
Connects a user device to a service interface, for example, a router to an AUSM card, a data line to a
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.
LMI (Local
Management
Interface)
The protocol and procedures for control of frame relay connections. Used for configuration, flow
control, and maintenance of these connections.
local addressing
A frame relay addressing convention that uses the DLCI to identify the frame relay port at the
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.
local bus
An utility bus (LB/0 or LB/1) located on the midplane, which provides the electrical connections
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.
Logical Interface
Each physical interface and every virtual trunk endpoint on a platform is represented to the VSI
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.
logical port
A frame relay circuit consisting of either 1, 6, 24 (T1,) or 31 (E1) contiguous DSO's on a T1 or E1
physical port.
LSR
Label Switching router, which is an MPLS (Multiprotocol Label Switching) router.
M
major alarm
A local or remote failure that is affecting operation of the network.
MBS (Maximum
Burst Size)
Maximum number of cells which may burst at the PCR but still be compliant.
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
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Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...