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OSN 500 550 580 V100R008C50 Commissioning and Configuration Guide 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Parameters for Configuring IMA Services (on a Per-NE Basis)

Parameters for Configuring IMA Services (on a Per-NE Basis)

This section describes the parameters for configuring IMA services on a per-NE basis.

Bound Path

This topic describes the parameters for bound paths of IMA services.

Table 3-390  Parameters for bound paths
Parameter Value Range Description
Available Boards For example, 4-MD1 Displays or specifies the configurable board.
Configurable Port For example, 4-MD1-1(Port-1) Displays or specifies the configurable port.
VCTRUNK For example, 4-MD1-1(Port-1) Displays the VCTRUNK.
Level

E1, Fractional E1

Default value: E1

Displays the level of bound paths.

  • If ATM/IMA services need to be mapped into an ATM trunk that binds to one or more E1 ports for transmission, select E1 in Level.
  • If ATM/IMA services need to be mapped into an ATM trunk that binds to one or more SP ports for transmission, select Fractional E1 in Level.
Direction For example, Bidirectional Displays the direction of bound paths. The value is always Bidirectional.
Optical Interface -
NOTE:

The OptiX OSN equipment does not support this parameter.

Available Resources For example, 4-MD1-1(PORT-1)

Displays the ports available for configuring bound paths of the IMA service.

Ports on a service board can function as Available Resources when their Port Mode is set to Layer 2.

Available Timeslots -
NOTE:

The OptiX OSN equipment does not support this parameter.

Bound Path For example, 4-MD1-(1) Displays the bound path.
Number of Bound Paths For example, 4
Displays the number of bound paths for the IMA service.
NOTE:
Here, the number of bound bidirectional paths is displayed. For example, the number of bound paths is 4 when two E1 ports are bound.
Display in Combination

Selected, deselected

Default value: selected

Displays whether the bound IMA paths are displayed in combination.

IMA Group Management

This topic describes the parameters for IMA group management.

Table 3-391  Parameters for IMA group management
Parameter Value Range Description
VCTRUNK For example, 4-MD1-1(Port-1) Displays the VCTRUNK.
IMA Protocol Enable Status

Enabled, Disabled

Default value: Disabled

Specifies the IMA protocol status.
Minimum Number of Active Transmitting Links

1-16

Default value: 1

You need to set this parameter for each IMA group. An IMA group can be activated only when the number of activated links in the IMA group reaches the value of this parameter.

Minimum Number of Active Receiving Links

1-16

Default value: 1

You need to set this parameter for each IMA group. An IMA group can be activated when the number of activated links in the IMA group reaches the value of this parameter.

IMA Protocol Version

1.0, 1.1

Default value: 1.1

Specifies the IMA protocol version.

NOTE:

The IMA protocol version at the local end needs to be the same as that at the peer end.

IMA Transmit Frame Length

32, 64, 128, 256

Default value: 128

Specifies the IMA transmit frame length.

In order for the receive end to rebuild the ATM cell stream from diversely-delayed links, the transmit end periodically sends ICP cells on each link. The number of ATM cells between each two ICP cells is the IMA transmit frame length.

IMA Symmetry Mode

Symmetrical Mode and Symmetrical Operation, Symmetrical Mode and Asymmetrical Operation, Asymmetrical Mode and Asymmetrical Operation

Default value: Symmetrical Mode and Symmetrical Operation

Specifies the configuration and running modes of the links in an IMA group.

Symmetrical Mode and Symmetrical Operation: Each link in an IMA group is configured with capabilities in both the Tx and Rx directions (symmetrical configuration). In addition, when one direction of a link is interrupted, the other direction of the link is also interrupted (symmetrical operation).

Symmetrical Mode and Asymmetrical Operation: Each link in an IMA group is configured with capabilities in both the Tx and Rx directions (symmetrical configuration). In addition, when one direction of a link is interrupted, the other direction of the link can still work (asymmetrical operation).

Asymmetrical Mode and Asymmetrical Operation: Each link in an IMA group is configured with capabilities in either the Tx or Rx direction (asymmetrical configuration). In addition, when one direction of a link is interrupted, the other direction of the link can still work (asymmetrical operation).

NOTE:

The OptiX OSN equipment supports only Symmetrical Mode and Symmetrical Operation.

Maximum Delay Between Links(ms)

1-120

Default value: 25

Specifies the maximum delay between links in an IMA group.
Clock Mode

CTC Mode, ITC Mode

Default value: CTC Mode

Specifies the clock mode of an IMA group.

  • CTC Mode: common transmit clock (CTC) mode. In this mode, the transmit clocks of all links in an IMA group come from the same clock source.
  • ITC Mode: independent transmit clock (ITC) mode. In this mode, the transmit clocks of different links in an IMA group come from different clock sources.

Status of an IMA Group

During configuration of IMA services, set parameters that are used for configuring the status of an IMA group according to service requirements.

Table 3-392  Parameters that are used for configuring the status of an IMA group
Field Value Description

VCTRUNK

Example: 4-MD1-1(Trunk-1)

Display the VCTRUNK.

Near-End Group Status

Not Configured, Start-Up, Start-Up-ACK, Config-Aborted, Insufficient-Links, Blocked, Operational

Display the near-end group status.

  • Not Configured: The group does not exist.
  • Start-Up: This end is in the Start-Up status and is waiting to be indicated that the far-end is also in the Start-Up status.
  • Start-Up-ACK: This is a transitional state. When both the near-end and far-end groups start-up, they move to this state.
  • Config-Aborted: This state is entered when the far-end tries to apply unacceptable configuration parameters.
  • Insufficient-Links: This state implies that the group has accepted the far-end group parameters and has been indicated that the far-end has also accepted its own group parameters, and does not have sufficient links to move into the Operational state.
  • Blocked: The group is blocked (for example, inhibited by the UM). The group can be blocked for maintenance purposes while sufficient links are Active in both transmitting and receiving directions.
  • Operational: The group is not inhibited and has sufficient links in both transmitting and receiving directions.

Far-End Group Status

Not Configured, Start-Up, Start-Up-ACK, Config-Aborted, Insufficient-Links, Blocked, Operational

Display the Far-end group status.

Transmit Rate (cell/s)

For example: 1000

Display the transmit rate.

Receive Rate (cell/s)

For example: 1000

Display the receive rate.

Number of Transmit Links

1 to 16

Display the number of transmit links.

Number of Receive Links

1 to 16 Display the number of receive links.

Number of Activated Transmit Links

1 to 16

Display the number of activated transmit links.

Number of Activated Receive Links

1 to 16 Display the number of activated receive links.

Status of an IMA Link

During configuration of IMA services, set parameters that are used for configuring the status of an IMA link according to service requirements.

Table 3-393  Parameters that are used for configuring the status of an IMA link
Field Value Description

VCTRUNK

For example, 4-MD1-1(Trunk-1)

Displays the VCTRUNK.

E1 Link

For example, 4-MD1-1(PORT-1)-1

Displays the E1 link information.

Differential Delay Check Status

Unknown, Valid, Invalid Queries the delay state of the IMA link.

Near-End Receiving Status

Not In Group, Unusable, Usable, Active

Displays the near-end receiving status.

  • Not In Group: The link is not included in the IMA group.
  • Unusable: The link is added to the IMA group but is unavailable due to a fault or manual suppression.
  • Usable: The link for receiving ATM signals is configured and waiting for the transmit end of FE services to be available or activated.
  • Active: The link is transmitting services.

Near-End Transmitting Status

Not In Group, Unusable, Usable, Active

Displays the near-end transmitting status.

  • Not In Group: The link is not configured.
  • Unusable: The link is configured, but not in use because of fault, inhibition, and so on.
  • Usable: The link is ready to bear services, but waiting for the other end to be Usable or Active.
  • Active: The link is bearing services.

Far-End Receiving Status

Not In Group, Unusable, Usable, Active

Displays the far-end receiving status.

  • Not In Group: The link is not configured.
  • Unusable: The link is configured, but not in use because of fault, inhibition, and so on.
  • Usable: The link is ready to bear services, but waiting for the other end to be Usable or Active.
  • Active: The link is bearing services.

Far-End Transmitting Status

Not In Group, Unusable, Usable, Active

Displays the far-end transmitting status.

  • Not In Group: The link is not configured.
  • Unusable: The link is configured, but not in use because of fault, inhibition, and so on.
  • Usable: The link is ready to bear services, but waiting for the other end to be Usable or Active.
  • Active: The link is bearing services.

Port Management

During configuration of IMA services, set parameters that are used for configuring port management according to service requirements.

Table 3-394  Parameters that are used for configuring port management
Field Value Description

Port

For example, 4-MD1-1(Port-1)

Displays a port.

Name

For example, Port1

Specifies the name of a self-defined port.

Port Type

UNI, NNI

Default value: UNI

Specifies the type of cells processed by an ATM port on the access side.

The parameter value for an ATM port must be consistent with that for the peer.

UNI: indicates that a UNI ATM cell (with the GFC field in the header) is received through IMA.

NNI: indicates that an NNI ATM cell (with no GFC field in the header) is received through IMA.

ATM Cell Payload Scrambling

Disabled, Enabled

Default value: Enabled

Determines whether to enable scrambling of the 48-byte payload in an ATM cell to improve security.

Recommended value: Enabled

Loopback

Non-Loopback, Outloop, Inloop

Default value: Non-Loopback

Specifies a loopback state for a port.

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Updated: 2019-01-21

Document ID: EDOC1100020976

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