Cisco BPX 8650, Installation And Configuration Manual

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Glossary
GL-11
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.30, Part Number 78-12907-01 Rev. E0, May 2005
frame relay module
See FRM.
frame relay
module-2
See FRM-2.
frame relay service
A packet interface data transmission protocol used for connecting widely-separated LANs.
Characterized by long intervals of no data to be sent interspersed with bursts of large volumes of data;
sometimes referred to as “bursty data”.
FRI
frame relay interface.
The back card for an FRM (IGX switch) card. The FRI provides V.35, X.21, T1, or E1 interfaces.
FRM
frame relay module.
An IGX frame relay front card that supports 1 to 4 data ports, and in single-port mode, operates up to
2.048 Mbps. The card is used in conjunction with FRI-V.35, X.21, T1, or E1 back cards.
FRM-2
frame relay module-2.
An IGX frame relay front card that provides an interface to the frame relay Port Concentrator Shelf
(PCS). The card is used with the FRI-2-X.21 back card which connects to the PCS.
FRTT
fixed round trip time.
The sum of the fixed and propagation delays from the source to a destination and back.
full status report
A message sent across the NNI indicating the A-bit status of all connections routed across this NNI
frame relay port.
G
gateway
A node configured to handle both T1 and E1 packet and circuit lines for direct interface international
circuits.
GCRA
generic cell rate algorithm.
GCRA is a “continuous leaky-bucket” process that monitors the cell depth in the input queue for each
PVC to determine whether to admit a new cell to the network without setting the Cell Loss Priority bit.
generic cell rate
algorithm
See GCRA.
global addressing
A frame relay addressing convention that uses the DLCI to identify a specific end device somewhere
else in the frame relay network. In a global addressing scheme, the DLCI is a unique number for each
port in the network.
grouped
connections
Frame relay connections grouping a number of ports onto one permanent virtual circuit. Similar to
bundled connections except the grouped connections do not have to be contiguous, nor do they all have
to be added simultaneously.