Setting Up Virtual Connection Access (VCAs)
  • 25 Sep 2024
  • 14 Minutes to read
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Setting Up Virtual Connection Access (VCAs)

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Article summary

To view a summary of existing VCAs

  1. Access the page Virtual Connection ▶ VCA ▶ Configuration.

  2. From the top right corner select a Remote Device from the drop down menu.

  3. Select Remote Device Name from the Filter drop down menu.

  4. Click Search.
    A list of all existing VCAs is displayed.


To add a new VCA

  1. Access the page Virtual Connection ▶ VCA ▶ Configuration.

  2. Click Add to create a new VCA or click the Name of an existing VCA to edit its settings.

  3. Add VCs from the list of available VCs.

  4. Press Apply.

For more information on specific parameters, refer to the following table.

VCA Configuration and Summary (Virtual Connection ▶ VCA ▶ Configuration)

ParameterDescription
VCA NameA name that uniquely identifies the VCA (same as VCE) on the Cisco Provider Connectivity Assurance Sensor Control.
Remote Device NameA name that uniquely identifies the remote device where the VCA is associated.
VC listThe VC list is a comma separated list of VCEs (type Operator or Customer) or an implicit VCA containing a VCE tunnel instance referenced by name.
Bandwidth Regulator StatisticsThe statistics summary of traffic regulators.


To add VCs to or from the VC list

  1. To add VCs, select the desired VCs from the Available VC list.

  2. Use the double arrow to move them to the right into the VC list.
    Those selected will move to the VC list.


To remove VCs from the VC list

  1. To remove VCs, select the desired VCs from the VC list.

  2. Use the double arrow to move them to the left.
    Those selected will be removed from the VC list.


To reorder VCs in the VC list

  1. Select the desired VC.

  2. Use the + or - buttons to move up or down respectively.
    The selected VC will be reordered in the list.


    Note: The order of the VCs shall be aligned such that TP-A of the first VC is mapped to an external port and TP-Z of the last VC is also mapped to an external port.


For more information on specific parameters, refer to the following table.

VCA Configuration Add/Edit VCA (Virtual Connection ▶ VCA ▶ Configuration)

ParameterDescription
VCA NameA name that uniquely identifies the VCA on the Sensor Control.
Available VCThis is a list of available VCs in a specified Remote Device, this field also allows you to select VCs from a list of available VCs that you want to add to the VC list.
VC listThe VC list is a comma separated list of VCEs (type Operator or Customer) or an implicit VCA containing a VCE tunnel instance referenced by name.


To add a classification profile configuration

  1. Click Add to open the classification profile configuration window.

  2. Click in the Name field to assign a name to the classification profile.

  3. Set Filters, Action and Mapping order.

  4. Click Apply to save changes.
    The new classification will now show in the AtoZ or ZtoA classification list.


To edit a classification profile configuration

  1. Select the configuration you wish to edit.

  2. Click Edit to open the classification profile configuration window.

  3. Edit the Name, Filter, Action and Mapping order fields as needed.

  4. Click Apply to save changes.
    The modified classification will now show in the AtoZ or ZtoA classification list.


To delete a classification profile configuration

  1. Select the configuration you wish to remove.

  2. Click Delete.
    The deleted classification will be removed from the AtoZ or ZtoA classification list.


    Note: In order to modify a classification, you will need to delete or disable the policy.

After adding, editing or deleting the classifications, click Apply to save them in the VCA. For more information on specific parameters, refer to the following table.


To reorder a classification

  1. Access Virtual Connection ▶ VCA ▶ Configuration.

  2. On the top right, from the Remote Device drop-down list, select the device you require.

  3. Click the VCA name.

  4. Under Classification Profile, select the classification you want to reorder.

  5. Click + for up and - for down.
    The classification has now been moved up or down.

  6. Click Apply to save changes.

Classification Profile and Classification Profile Configuration (Virtual Connection ▶ VCA ▶ Configuration)

ParameterDescription
A to Z and Z to A ClassificationClassification is configured for the AtoZ direction or for the ZtoA direction and on a VCA that links VCE from and external port to an external port.
NameIdentifies the classification profile on the VCA.

A classification profile name must be unique inside a VCA.

Filter TypeThe filter type (Layer-2 filter, IPv4 filter, or IPv6 filter, none) used to classify traffic.
Filter NameThe name of the filter. You must select a filter name from the drop-down list.

Tip: The catch-all filter enables you to monitor all traffic on a port.

ActionThe action applied to traffic that matches the filter. Make a selection from the drop-down list:
  • Drop Traffic: The traffic matching the filter is dropped.
  • Permit Traffic: The traffic matching the filter is counted in the statistics then forwarded.
CoS Mapping OrderDefines the order for CoS mapping application.

For example: for an IP frame, with or without VLAN, the DSCP value will be used for cos mapping if DSCP/PCP/Direct is selected. If the PCP/DSCP/Direct is selected the PCP value will be used for CoS mapping.

Possible values:

  • DSCP/PCP/Direct
  • PCP/DSCP/Direct
Note: The selected order can only be applied if the DSCP/IP Mapping checkbox is checked; whereas for PCP/DSCP/Direct to be applied, the PCP Mapping checkbox must be checked. See Table below, CoSMappingCombinations for more applicable mapping combinations.

Mapping Settings

ParameterDescription
PCP MappingSets value for PCP field.
  • PCP: Priority Code Point.
Note: If PCP Mapping is not enabled or applicable, then Direct Mapping will be used.
DSCP/IP MappingSpecifies the type of mapping upon which the bandwidth regulator set is based. The type you choose may be one of the following:
  • IP Precedence: IP precedence mapping.
  • DSCP: Differentiated Services Code Point mapping.
Note: If DSCP/IP Mapping is not enabled or applicable, then Direct Mapping will be used.
Direct MappingCFI/DEI

Sets value for CFI/DEI field.

  • CFI: The Canonical Format Indicator.
  • DEI: Drop Eligibility Indicator.
Note: This value should be set to zero for connections to Ethernet switches. CFI is used to ensure compatibility between Ethernet type networks and Token Ring type networks. If a frame received at an Ethernet port has a CFI set to 1, the frame should not be forwarded "as-is" to an untagged port. In the context of bandwidth regulation, DEI can be used to carry the frame color. When set to 0, the frame is green; when set to 1 the frame is yellow.

Direct PCP

  • PCP: Priority Code Point.
+/-Use these buttons to reorder the classifications up or down as required.

CoS Mapping Combinations

MappingDSCP/IPPCPDirect Type of TrafficTaggedResulting CoS
DSCP/PCP/DirectXXL3DSCP
DSCP/PCP/DirectXL3DSCP
DSCP/PCP/DirectXL3YesPCP
DSCP/PCP/DirectXL2YesPCP
DSCP/PCP/DirectXL2NoDirect
DSCP/PCP/DirectL2YesDirect
DSCP/PCP/DirectL2NoDirect
PCP/DSCP/DirectXXL3PCP
PCP/DSCP/DirectXL3DSCP
PCP/DSCP/DirectXL3YesPCP
PCP/DSCP/DirectXL2YesPCP
PCP/DSCP/DirectXL2NoDirect
PCP/DSCP/DirectL2YesDirect
PCP/DSCP/DirectL2NoDirect


To add a policing configuration

  1. Click Add to open the Policing Configuration window.

  2. Enter the name of the profile you wish to add in the Name field.

  3. Set the CIR, CIR MAX, CBS, EIR, EIR MAX and EBS rates, see table below.

  4. Select Color Mode and Coupling Flag from drop down menus.

  5. Click Apply to save changes.
    The policing configuration has now been configured.


To edit a policing configuration

  1. Select the configuration you wish to edit.

  2. Click Edit to open the policing configuration window.
    Enter the name of the profile you wish to add in the field.

  3. Edit fields as required.

  4. Click Apply to save changes.
    The policing configuration has now been edited.


To delete a policing configuration

  1. Select the configuration you wish to edit.

  2. Click Delete.
    The policing configuration has now been deleted.

After adding, editing or deleting the policing, click Apply to save them in the VCA. For more information on specific parameters, refer to the following table.

Policing and Policing Configuration (Virtual Connection ▶ VCA ▶ Configuration)

ParameterDescription
Bandwidth Regulator NameA name identifying the bandwidth regulator.
Committed Information Rate (CIR)The average rate up to which service frames are delivered by the bandwidth regulator. CIR-conformant frames are colored green.
  • Range: 0 to maximum port speed (steps of 125 kbps)
Maximum Committed Information Rate (CIR Max)The maximum CIR, expressed in kbps, that the regulator can achieve by using the shared tokens from its envelope
  • Range: CIR to maximum port speed (steps of 125 kbps)
Committed Burst Size (CBS)The maximum number of kibibytes available for a burst of frames that are sent at the port's speed and remain CIR conformant.

Note: The burst size must be greater than the port's Maximum Transfer Unit (MTU).

  • Range: 0 KiB to 2047 KiB (steps of 1 KiB) (1024 bytes)

Note: 1 KiB of CBS is required for each 500 Mbps of CIR. For example, if the CIR MAX is set to 1 Gbps, the minimum CBS value is 2 KiB.

Excess Information Rate (EIR)The average rate up to which excess service frames are delivered by the bandwidth regulator.

EIR-conformant frames are colored yellow.

Yellow traffic in excess of this maximum is declared red by the regulator then dropped.

  • Range: 0 to maximum port speed (steps of 125 kbps)
Maximum Excess Information Rate (EIR Max)The maximum EIR, expressed in kbps, that the regulator can achieve by using the shared tokens from its envelope or from C bucket if Coupling Flag of bandwidth regulator = true.
  • Range: EIR to maximum port speed (steps of 125 kbps)
Excess Burst Size (EBS)The maximum number of kibibytes available for a burst of frames that are sent at the port's speed and remain EIR conformant.

Note: The burst size must be greater than the port's MTU.

  • Range: 0 KiB to 2047 kB (steps of 1 KiB) (1024 bytes)

Note: 1 KiB of EBS is required for each 500 Mbps of EIR. For example, if the EIR Max is set to 1 Gbps, the minimum EBS value is 2 KiB.

Color Mode (CM)Make a selection from the drop-down list to indicate how the bandwidth profile should handle the color of the regulator's incoming traffic:
  • Color-Aware: The pre-determined level of bandwidth profile compliance for each frame is taken into account when evaluating its level of compliance.
  • Color-Blind: All incoming traffic is colored green when it initially enters the bandwidth regulator.
Coupling Flag (CF)Make a selection from the drop-down list to indicate how the regulator processes yellow traffic via the coupling flag:
  • False: Yellow data is limited according to the Excess Information Rate.
  • True: Yellow data is limited according to a combination of the Committed Information Rate and the Excess Information Rate.


To establish the Bandwidth Regulator Set

  1. For each CoS ID, choose the BW Profile you would like to enable from the pull-down menu.

  2. Check the State check box to enable the BW Profile.

  3. Click Apply to save changes.
    The Bandwidth Regulator Set has now been configured.

Bandwidth Regulator Set (Virtual Connection ▶ VCA ▶ Configuration)

ParameterDescription
AtoZ and ZtoAThe direction of the traffic flow.
CoS IDIdentification of the CoS Mapping.
Bandwidth ProfileBandwidth Profile to select from a drop-down menu.
StateThe current state of this bandwidth: enabled or disabled


To enable Bandwidth Regulator Envelope

  1. Check the Enable AtoZ or ZtoA H-BWP check box to enable the required BW Profile.

  2. Click Apply to save changes.
    The Bandwidth Regulator Envelope has now been configured.


To reorder Bandwidth Regulators

  1. Access Virtual Connection ▶ VCA VLAN ▶ Configuration.

  2. On the top right, from the Remote Device drop-down list, select the device you require.

  3. Click the VCA-VLAN name.

  4. Under Bandwidth Regulator Envelope, select the Bandwidth regulator you want to reorder.

  5. Click + for up and - for down.
    The Bandwidth Regulator Envelope has now been moved up or down.

  6. Click Apply to save changes.

For more information on specific parameters, refer to the following table.

Bandwidth Regulator Envelope (Virtual Connection ▶ VCA VLAN ▶ Configuration)

ParameterDescription
AtoZ Coupling Flag/ ZtoA

Coupling Flag

Use this box to indicate how the regulators in this envelope process yellow traffic:
  • Checked: Yellow data is limited according to a combination of the Committed Information Rate and the Excess Information Rate.
  • Unchecked: Yellow data is limited according to the Excess Information Rate. This is the default value.

Note: To enable the coupling flag for the envelope, you must disable the coupling flag in all regulators.

Enable AtoZ H-BWP/ Enable

ZtoA H-BWP

Use this box to indicate how the regulators in this envelope process the Bandwidth Profile:
  • Checked: Enabled.
  • Unchecked: Disabled.
+/-Use these buttons to reorder the bandwidth regulators up or down as required.

Viewing VCA Bandwidth Regulator Statistics

To view traffic regulator statistics

  1. Access the page Virtual Connection ▶ VCA ▶ Configuration to view the configuration summary of all VCAs.

  2. Click the VCA name under the BW Regulator Statistics column to view the summary of statistics of all bandwidth regulators of that VCA.

  3. Click the BW Regulator Name to view the detailed statistics of the selected bandwidth regulator.

For more information on specific parameters, refer to the following table.

Bandwidth Regulator Statistics (Virtual Connection ▶ VCA ▶ Configuration ▶ BW Regulator Statistics)

ParameterDescription
NameThe name assigned to the regulator.
Accept bytesThe total number of bytes accepted by this regulator since the last time they have been cleared.
Accept packetsThe total number of frames accepted by this regulator since its creation.
Accept L1 rate (Mbps)The rate of accepted Layer-1 data, expressed in Mbps. This is the number of megabits of Layer-1 traffic accepted in the last second of transmission.
Accept L2 rate (Mbps)The rate of accepted Layer-2 data, expressed in Mbps. This is the number of megabits of Layer-2 traffic accepted in the last second of transmission.
Drop bytesThe total dropped bytes by this regulator since the statistical count started.
Drop packetsTotal dropped frames by this regulator since its creation
Drop L1 rate (Mbps)The rate of dropped Layer-1 data, expressed in Mbps.

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-1".

Drop L2 rate (Mbps)The rate of dropped Layer-2 data, expressed in Mbps.

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-2".

Green bytesThe total number of green bytes handled by this regulator since its creation.

Traffic that is declared green and complies with the CIR is allowed to pass through the policer without rate limitation. Green traffic in excess of this maximum is declared yellow by the regulator and is subject to EIR regulation.

Green packetsThe total number of green frames handled by this regulator since its creation.

Traffic that is declared green and complies with the CIR is allowed to pass through the policer without rate limitation. Green traffic in excess of this maximum is declared yellow by the regulator and is subject to EIR regulation.

Green L1 rate (Mbps)The rate of green Layer-1 data, expressed in Mbps .

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-1".

Green L2 rate (Mbps)The rate of green Layer-2 data, expressed in Mbps

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-2".

Yellow bytesThe total number of yellow bytes handled by this regulator since its creation. Yellow traffic in excess of this maximum is declared red by the regulator, then dropped.
Yellow packetsThe total number of yellow frames handled by this regulator since its creation. Yellow traffic in excess of this maximum is declared red by the regulator, then dropped.
Yellow L1 rate (Mbps)The rate of yellow Layer-1 data, expressed in Mbps

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-1".

Yellow L2 rate (Mbps)The rate of yellow Layer-2 data, expressed in Mbps

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-2".

Red bytesThe total number of red bytes handled by this regulator since its creation.
Red packetsThe total number of red frames handled by this regulator since its creation.
Red L1 rate (Mbps)The rate of red Layer-1 data, expressed in Mbps

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-1".

Red L2 rate (Mbps)The rate of red Layer-2 data, expressed in Mbps

Note: Only applies if the Regulator Working Rate parameter in the Traffic ▶ Configuration page has been set to "Layer-2".

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