21-27
Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 21 Configuring ATM Connections
ATM Connection Configuration
VSVD
Virtual Source Virtual Destination:
(see Meaning of VSVD and Flow Control External Segments, Figure 21-9)
FCES (Flow Control External
Segments)
(see Meaning of VSVD and Flow Control External Segments, Figure 21-9)
SCR
Sustainable Cell Rate:
Long term limit on the rate a connection can sustain
MBS
Maximum Burst Size:
Maximum number of cells which may burst at the PCR but still be compliant. Used
to determine the Burst Tolerance (BT) which controls the time scale over which the
SCR is policed
Policing
(see definitions of Traffic Policing, Table 21-5)
VC QDepth
VC Queue Depth
CLP Hi
Cell Loss Priority Hi threshold (% of VC QMax)
CLP Lo/EPD
Cell Loss Priority Low threshold (% of VC QMax)/Early Packet Discard. If AAL5
FBTC = yes, then for the BXM card this is the EPD threshold setting.
EFCI
Explicit Forward Congestion Indication threshold (% of VC QMax)
ICR
Initial Cell Rate:
The rate at which a source should send initially and after an idle period
ADTF (ATM Forum TM 4.0
term)
The Allowed-Cell-Rate Decrease Factor:
Time permitted between sending RM-cells before the rate is decreased to ICR
Trm (ATM Forum TM 4.0 term)
An upper bound on the time between forward RM-cells for an active source, i.e., RM
cell must be sent at least every Trm msec
RIF (ATM Forum TM 4.0 term)
Rate Increase Factor:
Controls the amount by which the cell transmission rate may increase upon receipt
of an RM cell
RDF (ATM Forum TM 4.0 term) Rate Decrease Factor:
Controls the amount by which the cell transmission rate may decrease upon receipt
of an RM cell
Nrm (ATM Forum TM 4.0 term),
BXM only.
Nrm
Maximum number of cells a source may send for each forward RM cell, i.e. an RM
cell must be sent for every Nrm-1 data cells
FRTT (ATM Forum TM 4.0
term),
BXM only.
Fixed Round Trip Time: the sum of the fixed and propagation delays from the source
to a destination and back
TBE (ATM Forum TM 4.0 term),
BXM only.
Transient Buffer Exposure:
The negotiated number of cells that the network would like to limit the source to
sending during start-up periods, before the first RM-cell returns.
Table 21-7
Connection Parameter Descriptions (continued)
Parameter
Description
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
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Страница 151: ...P A R T 2 Installation ...
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Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
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Страница 291: ...P A R T 4 Configuring Connections ...
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Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
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Страница 531: ...P A R T 6 BPX Specifications ...
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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 ...