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  Viewing Virtual Connection Properties
To view ATM virtual connection cross-connects: 
Step 1In the Vision client, right-click the required device, then choose Inventory. 
Step 2Open the VC Cross Connect table in either of the following ways: 
In the Inventory window, choose Logical Inventory > VC Switching Entities > VC Switching 
Entity. The Cross-Connect Table is displayed in the content pane as shown in Figure 26-5. 
In the Inventory window:
a.Choose Physical Inventory > Chassis >Slot>Subslot>Po r t. 
b.Click the Show Cross Connect button.
The VC Cross Connections window is displayed and contains the same information as the 
Cross-Connect Table in logical inventory.
Step 3Select an entry and scroll horizontally until you see the required information.
Figure 26-5 ATM Virtual Connection Cross-Connect Properties
Table 26-1 identifies the properties that are displayed for ATM VC cross-connects.  
						

							 
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  Viewing Virtual Connection Properties
Table 26-1 ATM Virtual Connection Cross-Connect Properties
Field Description
In Port Incoming port for the cross-connect.
In VC Incoming virtual connection for the cross-connect. 
You can view additional details about the virtual connection in the following 
ways:
Click the hyperlinked entry to view the VC table.
Right-click the entry, then choose Properties to view information about the 
incoming and outgoing VCIs, VPI, service category, and traffic descriptors.
Out Port Outgoing port for the cross-connect.
Out VC Outgoing virtual connection for the cross-connect. 
You can view additional details about the virtual connection in the following 
ways:
Click the hyperlinked entry to view the VC table.
Right-click the entry, then choose Properties to view information about the 
incoming and outgoing VCIs, VPI, service category, and traffic descriptors.
In VC Ingress 
Traffic DescriptorATM traffic parameters and service categories for the incoming traffic on the 
incoming VC cross-connect.
For information on VC traffic descriptors, see Table 26-2.
In VC Egress 
Traffic DescriptorATM traffic parameters and service categories for the outgoing traffic on the 
incoming VC cross-connect.
For information on VC traffic descriptors, see Table 26-2.
Out VC Egress 
Traffic DescriptorATM traffic parameters and service categories for the outgoing traffic on the 
outgoing VC cross-connect.
For information on VC traffic descriptors, see Table 26-2.
Out VC Ingress 
Traffic DescriptorATM traffic parameters and service categories for the incoming traffic on the 
outgoing VC cross-connect.
For information on VC traffic descriptors, see Table 26-2. 
						

							 
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Table 26-2 Virtual Connection Traffic Descriptors
Value Description
ABR Available bit rate (ABR) supports nonreal-time applications that tolerate high 
cell delay, and can adapt cell rates according to changing network resource 
availability to prevent cell loss.
CBR Constant bit rate (CBR) supports real-time applications that request a static 
amount of bandwidth that is continuously available for the duration of the 
connection. 
CDVT Cell Delay Variation Tolerance (CDVT) specifies an acceptable deviation in 
cell times for a PVC that is transmitting above the PCR. For a given cell 
interarrival time expected by the ATM switch, CDVT allows for some variance 
in the transmission rate. 
CLP Cell loss priority (CLP) indicates the likelihood of a cell being dropped to ease 
network congestion.
MBS Maximum Burst Size (MBS) specifies the number of cells that the edge device 
can transmit up to the PCR for a limited period of time without penalty for 
violation of the traffic contract. 
MCR Minimum Cell Rate (MCR) specifies the cell rate (cells per second) at which 
the edge device is always allowed to transmit.
PCR Peak Cell Rate (PCR) specifies the cell rate (cells per second) that the edge 
device cannot exceed. 
PDR CLP0+1: 1536 Packet delivery ratio (PDR) for all cells (both CLP1 and CLP0 cells) on the 
circuit.
SCR Sustainable Cell Rate (SCR) specifies the upper boundary for the average rate 
at which the edge device can transmit cells without loss. 
UBR Unspecified Bit Rate (UBR) supports nonreal-time applications that tolerate 
both high cell delay and cell loss on the network. 
UBR+ Unspecified bit rate plus (UBR+) supports nonreal-time applications that 
tolerate both high cell delay and cell loss on the network, but request a 
minimum guaranteed cell rate.
nrt-VBR Nonreal-time variable bit rate (nrt-VBR) supports nonreal-time applications 
with bursty transmission characteristics that tolerate high cell delay, but require 
low cell loss. 
rt-VBR rt-VBR—Real-time variable bit rate (rt-VBR) supports real-time applications 
that have bursty transmission characteristics.  
						

							 
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Chapter 26      Managing Mobile Transport Over Pseudowire (MToP) Networks
  Viewing Virtual Connection Properties
Viewing ATM VPI and VCI Properties 
If you know the interface or link configured for virtual connection cross-connects, you can view ATM 
VPI and VCI properties from the physical inventory window or from the link properties window.
To view ATM VPI and VCI properties, open the VC Table window in either of the following ways: 
To open the VC Table window from physical inventory: 
a.In the map view, double-click the element configured for virtual connection cross-connects. 
b.In the Inventory window, choose Physical Inventory > Chassis >Slot>Subslot>Po r t. 
c.Click Show VC Table.
To view the VC Table window from the link properties window: 
a.In the map or links view, right-click the required ATM link and choose Properties.
b.In the link properties window, click Calculate VCs. 
c.After the screen refreshes, click either Show Configured or Show Misconfigured to view the 
virtual connection cross-connects. 
The VC Table window is displayed, as shown in Figure 26-6. 
Figure 26-6 VC Table
Table 26-3 describes the information displayed in the VC Table window.  
						

							 
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  Viewing Virtual Connection Properties
Viewing Encapsulation Information
To view virtual connection encapsulation information:
Step 1In the Vision client, double-click the element configured for virtual connection encapsulation. 
Step 2In the Inventory window, choose Physical Inventory > Chassis >Slot>Subslot>Po r t. 
Step 3Click the Show Encapsulation button. 
The VC Encapsulation window is displayed as shown in Figure 26-7. 
Figure 26-7 VC Encapsulation Properties Table 26-3 VC Table Properties
Field Description
VPI Virtual Path Identifier for the selected port.
VCI Virtual Channel Identifier for the selected port. 
Admin Status Administrative state of the connection: Up, Down, or Unknown.
Oper Status Operational state of the connection: Up, Down, or Unknown.
Ingress Traffic Descriptor Traffic parameters and service categories for the incoming traffic. For 
information on VC traffic descriptors, see Table 26-2.
Egress Traffic Descriptor Traffic parameters and service categories for the outgoing traffic. For 
information on VC traffic descriptors, see Table 26-2.
Shaping Profile Traffic shape profile used for the virtual connection.
Type ATM traffic descriptor type for the virtual connection. 
Interface Name Interface name, such as ATM1/1/16.  
						

							 
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  Viewing Virtual Connection Properties
Table 26-4 describes the information displayed in the VC Encapsulation window. 
Table 26-4 VC Encapsulation Properties
Field Description
VC Virtual connection identifier, such as VC:7/4.
Type Type of encapsulation, such as Point-to-Point Protocol (PPP) over 
ATM (PPPoA) or ATM adaption layer Type 5 (AAL5).
Binding Information Information tied to the virtual connection, such as a username.
Binding Status  Binding state: Bound or Unbound. 
VC Egress Traffic Descriptor Traffic parameters and service categories for the outgoing traffic.
For information on VC traffic descriptors, see Table 26-2.
VC Ingress Traffic Descriptor Traffic parameters and service categories for the incoming traffic.
For information on VC traffic descriptors, see Table 26-2.
Discovery Protocols Discovery protocol used for the VC. 
						

							 
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Chapter 26      Managing Mobile Transport Over Pseudowire (MToP) Networks
  Viewing IMA Group Properties
Viewing IMA Group Properties 
To view IMA group properties:
Step 1In the Vision client, double-click the required device. 
Step 2In the Inventory window, choose Logical Inventory > IMA Groups >group. IMA group properties 
and the IMA Members table are displayed in the content pane as shown in Figure 26-8. 
Figure 26-8 IMA Group Properties
Table 26-5 describes the information displayed for the IMA group.
Table 26-5 IMA Group Properties
Field Description
Active Bandwidth Active bandwidth of the IMA group.
Admin Status Administrative status of the IMA group.
Clock Mode Clock mode the IMA group is using: 
Common—Common transmit clocking (CTC). 
Independent—Independent transmit clocking (ITC). 
Configured Bandwidth Total bandwidth of the IMA group, which is the sum of all 
individual links in the group.
Description IMA group interface name.  
						

							 
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Frame Length Length of the IMA group transmit frames, in the number of cells: 
32, 64, 128, or 256. 
A small frame length causes more overhead but loses less data if a 
problem occurs. We recommend a frame length of 128 cells.
Group Number IMA group number.
Group State IMA group status, in the order of usual appearance:
Startup—The near end is waiting to receive indication that the 
far end is in Startup. The IMA group moves to the Startup-Ack 
state when it can communicate with the far end and has 
recorded IMA identifier, group symmetry, and other IMA group 
parameters.
Startup ACK—Both sides of the link are enabled. 
Config Aborted—The far end has unacceptable configuration 
parameters, such as an unsupported IMA frame size, an 
incompatible group symmetry, or an unsupported IMA version.
Insufficient Links—The near end has accepted the far end 
group parameters, but the far end does not have sufficient links 
to move into the Operational state.
Operational—The group is not inhibited and has sufficient links 
in both directions. The IMA interface can receive ATM layer 
cells and pass them from the IMA sublayer to the ATM layer.
Blocked—The group is blocked, even though sufficient links 
are active in both directions.
IMA Version IMA version configured, either 1.0 or 1.1.
Minimum Number of Rx Links Minimum number of Rx links needed for the IMA group to be 
operational. 
Minimum Number of Tx Links Minimum number of Tx links needed for the IMA group to be 
operational.
Number of Active Links Number of DS1 (E1 or T1) links that are active in the group.
Number of Configured Links Number of DS1 (E1 or T1) links that are configured in the IMA 
group.
Oper Status Operational state of the IMA group interface:
Dormant—The interface is dormant.
Down—The interface is down.
Not Present—An interface component is missing.
Testing—The interface is in test mode.
Unknown—The interface has an unknown operational status.
Up—The interface is up.
Port Type Type of port, such as ATM IMA.
Table 26-5 IMA Group Properties (continued)
Field Description 
						

							 
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Table 26-6 describes the information displayed in the IMA Members table. 
Step 3In the IMA Members table, click a hyperlinked port entry to view the port properties in physical 
inventory. See Figure 26-9.
The information that is displayed for the port in physical inventory depends on the type of connection, 
such as SONET or ATM.
Table 26-6 IMA Members Table
Column Description
Admin Status Administrative status of the IMA member.
Channelization Channelization that occurs through the path, such as STS1-> VTG-> VT15.
Information is displayed in this field only if the T1 or E1 path was 
channelized. If the line was not channelized, this field is not displayed. For 
example, if the IMA group is configured on a T1 or E1 card, this field is not 
displayed.
Clocking Source of the clocking mechanism: Internal or Line. 
Description Type of channelization, such as Synchronous Transport Signal 1 (STS-1) or 
Synchronous Transport Module level 1 (STM-1). 
Oper Status Operational state of the IMA member:
Physical Port Hyperlinked entry to the port in physical inventory.
Port Type Type of port, such as E1 or T1. 
						

							 
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Chapter 26      Managing Mobile Transport Over Pseudowire (MToP) Networks
  Viewing TDM Properties
Figure 26-9 ATM IMA Port in Physical Inventory
Viewing TDM Properties 
TDM is a mechanism for combining two or more slower-speed data streams into a single high-speed 
communication channel. In this model, data from multiple sources is divided into segments that are 
transmitted in a defined sequence. Each incoming data stream is allocated a timeslot of a fixed length, 
and the data from each stream is transmitted in turn. For example, data from data stream 1 is transmitted 
during timeslot 1, data from data stream 2 is transmitted during timeslot 2, and so on. After each 
incoming stream has transmitted data, the cycle begins again with data stream 1. The transmission order 
is maintained so that the input streams can be reassembled at the destination.
MToP encapsulates TDM streams for delivery over packet-switching networks (PSNs) using the 
following methods: 
SAToP—A method for encapsulating TDM bit-streams (T1, E1, T3, or E3) as pseudowires over 
PSNs.
CESoPSN—A method for encapsulating structured (NxDS0) TDM signals as pseudowires over 
PSNs.