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Cisco WAN Modeling Tools Guide
OL-10426-01, Rev. A0
Chapter 4 Configuration Tables and Fields
Port Concentrator
Port Concentrator
The Port Concentrator provides a method for concentrating voice and data connection types as a Frame
Relay connection extending to an FTC or FRM card. The NMT models and provisions Port
Concentrators so that they support Frame Relay connections. The card is modeled as a 44-port FRP card,
with the PC interface being optional but defaulting to V35.
Refer to Table 4-23 for information on modeling a network that uses port concentrators.
Table 4-23 Port Concentrator Configuration Notes
Topic Required Settings Comments
Instructing the NMT
to Design Port
Concentrators
Bursty table
Type field: Select FR, ATM=FR, or FR=ATM.
BC (back card) field: To specify a PC termination, enter PC in the BC field of
the site that has the PC. The NMT rejects PC if the connection type is
incorrect.
Fdr BC (feeder back card) field: Each PC termination can also specify which
PC interface is required. Enter V (for V.35), V1 (for V.11) or V2 (for V.28) in
the corresponding Fdr I/F field. If you leave the field blank, the interface
defaults to V.35.
Hub ID (for Site 1 and Site 2) fields
• The port ID is the slot.port ID for an FRP-PC card and is a virtual port. The
virtual port range is from 1 to 44, where ports 1 to 11 are on physical port 1,
12 to 22 are on physical port 2, 23 to 33 are on port 3, and 34 to 44 are on
port 4.
• Hub IDs can be used to model over-subscription, port-to-multiport
connections, and multiple PCs.
• A hub ID of 0 allows NMT to do design.
FdrID (Feeder ID) field: Not used
Access Ports table
Hub ID field: Slot is the PC slot and port is the virtual port (1 to 44). Do not
use feeder slot or feeder port column.
Speed field: Enter the port speed. If not supported, it will be rounded up to the
nearest supported speed. Speeds 9, 14, 19, and 38 will be respectively
interpreted as 9.6, 14.4, 19.2, and 38.4. If you have an Access Port table entry
for a PC port, the port speed is determined by the connections assigned to it.
NMT designs port concentrators if,
and only if, you enter connections that
have port concentrator terminations.
Geis bundling format is not supported
for FRP-PC.