No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search

Reminder

To have a better experience, please upgrade your IE browser.

upgrade

NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access
Rate and give feedback:
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).
Configuring ATM OAM

Configuring ATM OAM

To detect and locate faults on ATM links, you can configure ATM OAM.

Before You Start

Before configuring ATM OAM, familiarize yourself with the applicable environment, complete the pre-configuration tasks, and obtain the required data. This can help you complete the configuration task quickly and accurately.

Usage Scenario

OAM provides various optional methods of detecting and locating the faults on an ATM link. Choose the configuration as required.

  • To detect the link status and report faults in real time without interrupting services, activate the CC function or configure the end-to-end loopback detection function.
    • The CC function detects the link status in real time by sending CC cells periodically and does not restrict the connection point attribute.
    • The end-to-end loopback detection function detects the link status in real time by sending loopback cells periodically and is available on only the PVP/PVC with the connection point attribute of end-point.
    Check whether the device supports CC cells or loopback cells and choose configurations based on the OAM connection point attribute.

    The CC function and the end-to-end loopback function cannot be configured on the same PVP/PVC.

  • To locate and remove the link faults, configure the cell loopback function.

  • To debug and detect whether the ATM OAM mechanism works normally, insert OAM cells manually.

  • To respond to the OAM F5 loopback cells on the peer, configure the OAM F5 loopback cell response function.

Pre-configuration Tasks

Before configuring ATM OAM, complete the following tasks:

  • Configure physical attributes for the Router ATM interface.

  • Configure an IP address and mask for the ATM interface or sub-interface.

  • Configure an ATM PVC.

Data Preparation

To configure ATM OAM, you need the following data.

No.

Data

1

Number of the ATM interface

2

VPI/VCI value

3

Number of times loopback cells are sent

4

Interval at which end-to-end loopback cells are sent

5

Number of delayed intervals for responding after the PVP/PVC status changes

(Optional) Activating the CC Function

You can activate the CC function to detect link status and report faults in real time without service interruption.

Context

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number [.subinterface ]

    The ATM interface view is displayed.

  3. Run oam

    The OAM interface view is displayed.

  4. Run attribute { start-vpi [ end-vpi ] | vpi/start-vci [ vpi/end-vci ] } { end-point | seg-point }

    The OAM attributes of the connection point are configured.

    When IPoA services are configured on a PVC, the PVC attribute can be configured only as end-point.

    When the PVC attribute is end-point, the PVC can respond to the OAM F5 loopback cells.

  5. Run cc { start-vpi [ end-vpi ] | vpi/start-vci [ vpi/end-vci ] } { end-to-end | segment } { both |sink |source }

    The CC function is activated.

    When activating the CC function for a PVC or PVP, note the following:

    • Before activating the CC function, configure OAM attributes on both ends.

    • The type of the CC function to be activated must match OAM attributes.

    • During fault recovery, do not deactivate the CC function.

    • If the related NE board is functioning properly, you must stop the CC before deleting the OAM connection.

    • If the parameter sink or both is configured, a clear alarm will be generated when either of the following conditions is met:
      • The local end receives CC cells from the peer end.
      • The local end receives data cells from the peer end.

(Optional) Configuring OAM End-to-End Loopback Detection

You can configure end-to-end loopback detection to detect link status and report faults in real time without service interruption.

Context

Perform either of the following operations on the Router to implement end-to-end loopback detection:
  • Run the ping atm command in the system view.
  • Run the oam-Loopback command in the ATM OAM view.
When configuring the function of end-to-end loopback detection in the ATM OAM view, note the following:
  • The attribute of the OAM connection point of the PVP/PVC must be end-point.
  • The CC function and the loopback function cannot be configured on the same PVP/PVC.
  • During fault recovery, the undo oam-Loopback command cannot be run.
  • Before deleting OAM connections, run the undo oam-loopback command to disable the function of OAM end-to-end loopback detection if no faults occur on the board.

Perform the following steps on the Router:

Procedure

  • Implement end-to-end loopback detection in the system view.
    1. Run system-view

      The system view is displayed.

    2. Run ping atm interface atm interface-number vpi/vci end-to-end [ times ]

      End-to-end loopback detection is configured.

  • Implement end-to-end loopback detection in the ATM OAM view.
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number [.subinterface ]

      The ATM interface view is displayed.

    3. Run oam

      The OAM interface view is displayed.

    4. Run attribute { start-vpi [ end-vpi ] | vpi/start-vci [ vpi/end-vci ] } end-point

      The OAM attributes of the connection point are configured.

    5. Run oam-Loopback vpi/start-vci [ vpi/end-vci ] end-to-end

      The function of OAM end-to-end loopback detection of the PVP/PVC is enabled.

      Before enabling OAM end-to-end loopback detection on an interface that is transmitting traffic, ensure that the OAM attribute of the connection point is end-point. Otherwise, traffic on the local interface will be interrupted.

    6. (Optional) Run oam-Loopback vpi/start-vci [ vpi/end-vci ] up-cycle cycle-number down-cycle cycle-number

      The number of delayed intervals for responding after the PVP/PVC status changes is configured.

      By default, the number of delayed intervals for responding after the PVP/PVC status changes is 5.

      After the function of OAM end-to-end loopback detection is enabled, to prevent PVP/PVC flapping, the system does not immediately respond when the PVP/PVC status changes. When the PVP/PVC remains Down or Up for specified consecutive intervals, the system responds to the change.

(Optional) Configuring the Cell Loopback Function

After cell loopback is configured, the system checks loopback cells to detect and locate link faults.

Context

Perform the following steps on the Router:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number [.subinterface ]

    The ATM interface view is displayed.

  3. Run oam

    The OAM interface view is displayed.

  4. Run attribute { start-vpi [ end-vpi ] | vpi/start-vci [ vpi/end-vci ] }{ end-point | seg-point }

    When IPoA services are configured on a PVC, the PVC attribute can be configured only as end-point.

    When the PVC attribute is end-point, the PVC can respond to the OAM F5 loopback cells.

  5. Run loopback { vpi | vpi/vci } { end-loopback | seg-loopback } times

    The cell loopback function is configured.

    OAM provides loopback tests to facilitate fault locating. In tests, a loopback cell is inserted to the VC/VP of a connection point and is looped back by the other connection point. The system detects and locates link faults through the received loopback cells.

    The loopbacks can be classified as segment loopbacks and end loopbacks.

    • Before configuring the segment loopback, configure the peer loopback point as the segment point.

    • Before configuring the end loopback, configure the peer loopback point as the end point.

    • The loopback in one board fails.

(Optional) Configuring a One-Click Test for ATM Services

After ATM cell relay has been configured on an ATM interface or a logical interface that runs the ATM protocol, a one-click test can be configured for ATM services.

Context

Before configuring a one-click test for ATM services, you must complete the following tasks:
  1. Check that the physical layer status and protocol layer status of the interface on which the one-click test will be performed are Up. If the interface is a synchronous serial interface, configure ATM on the interface.

  2. Configure a PVC or PVP on the interface.

  3. Run the llid command to configure a local LLID for both the local end and peer end.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run test connectivity interface interface-type interface-number { pvc vpi/vci | pvp vpi } llid llid

    A one-click test is configured for ATM services.

Result

Run the display connectivity-test interface interface-type interface-number { pvc vpi/vci | pvp vpi } command to check the one-click test results for ATM services.

Verifying the ATM OAM Configuration

After ATM OAM is configured, verify the configuration.

Procedure

  • Run the display atm oam statistics atm interface-number { vpi | vpi/vci } command to check statistics of ATM OAM.
  • Run the display atm oam configuration atm interface-number [ vpi | vpi/vci ] command to check configurations of ATM OAM.

Example

Run the display atm oam command. The command output shows the ATM OAM statistics, alarm status, and configurations.

<HUAWEI> display atm oam statistics atm 3/0/1 10/10
Total number of received OAM Cells : 0
Number of received AIS Cells       : 0
Number of received RDI Cells       : 0
Number of received CC cells        : 0
Total number of sent OAM Cells     : 44
Number of sent AIS Cells           : 0
Number of sent RDI Cells           : 44
Number of sent CC cells            : 0
<HUAWEI> system-view
[HUAWEI] interface atm 3/0/1
[HUAWEI-Atm3/0/1] oam
[HUAWEI-Atm3/0/1-fatm-oam] display atm oam alarm-status atm 3/0/1
Interface    PVC/PVP     AIS state  AIS type  AIS reason  RDI state  RDI type
---------     -----     ---------  --------  ----------  ---------  --------
Atm3/0/1        10/10     RELEASE       -         -             RELEASE    -
Current displayed item(s) is : 1
[HUAWEI-Atm3/0/1-fatm-oam] display atm oam configuration atm 3/0/1
Interface     PVC/PVP      Attribute   CC func   CC dir    CC attr
---------      -----     ---------   -------   ------    -------
Atm3/0/1      10/10     end-point    disable        -         -
Current displayed item(s) is : 1
Download
Updated: 2019-01-02

Document ID: EDOC1100058399

Views: 13886

Downloads: 37

Average rating:
This Document Applies to these Products
Related Version
Related Documents
Share
Previous Next