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    Wavelength Protection Switch Solutions

    The WPS4 (BT8A78WPS4) provides 1+1 revertive or non-revertive optical protection switching.

    Four wavelength protection groups can be provisioned on one module.

    WPS4 modules function in a bookended configuration with one WPS4 being provisioned at the local node and one at the remote node.

    A wavelength protection group consists of 3 ports (Cnout / in, LnAout / in, LnBout / in) as shown in the diagram above.

    At the local node, the signal received at the Cnin port is split into two identical signals and transmitted out the LnAout and LnBout ports. These signals are received at the LnAin and LnBin ports at the remote node where an internal optical switch selects one of the incoming signals based on optical power levels. The selected signal is then transmitted out the Cnout port.

    Traffic transmitted from the remote node to the local node is handled in the same manner.

    The path between the two LnA ports is called the working path. The path between the two LnB ports is called the protecting (or protection) path. Either path can be active. An incoming path is active if its signal is selected by the internal optical switch. The other path is in standby. Only one path can be active at any given time.

    Note: Paths are unidirectional. For example, the working path can be active in one direction and standby in the opposite direction.

    Should a fault occur on the active path causing the received power to fall below the loss of light threshold, an automatic protection switch occurs. After the fault has been cleared, traffic continues to be selected from the active path unless the group is configured for revertive switching. In revertive switching, traffic reverts to the working path (LnA) when the wait-to-revert time expires. In this case, if traffic is already on the working path, it remains on the working path.

    The WPS4 provides the following functionality:

    • Can protect a single wavelength or multiple wavelengths
    • Supports operation on the following bands:
      • For extended C-band operation covering 1500 to 1570 nm
      • For L-band operation covering 1560 to 1620 nm
      • For O-band operation covering 1260 to 1360 nm
    • Broadcast launch via a splitter to active and standby paths
    • Active path selection via latching optical switch
    • Automatic switching based upon received power levels
    • Manual switching based upon provisioned switch state
    • Monitoring of all input power levels

    WPS4 Protection and Rapid Restoration Configurations

    The WPS4 supports the following applications:

    • Optical Protection Switching - In Optical Protection Switching configurations, WPS4 protection switching operates within 50 ms of fault detection to ensure a minimum disruption of service. See Table 1.
    • Rapid Restoration - In Rapid Restoration configurations, the time taken to restore traffic is dictated by the APSD or APR control systems between the local and remote WPS4. Therefore 50 ms protection switching is not guaranteed. The system will quickly and automatically restore service as soon as these controls resolve. This is typically in the order of seconds. See Table 2.

    Table 1: WPS4 Protection Switching Configurations

    Optical Protection Switching Configurations

    LoLightRx Threshold

    Unamplified line protection

    Default

    Unamplified channel protection

    Default

    Amplified line protection with unamplified protection path

    Default

    Amplified channel protection with amplified protection path

    Customized

    Table 2: WPS4 Rapid Restoration Configurations

    Rapid Restoration Configurations

    LoLightRx Threshold

    Amplified line restoration with unamplified protection path

    Default

    Amplified line restoration with amplified protection path

    Default

    If the optical solution you wish to use is not listed, please contact Juniper Networks Support.

    Wavelength Protection Switch Unamplified Line Protection

    The following example shows how the WPS4 can provide unamplified line protection within a network.

    The optical protection switch solution:

    • Is a simple system configuration with diverse network paths on working and protection fiber pairs
    • The default provisioning of the LoLightRx threshold (-35 dBm) should be used to protect for a fiber break on system fibers.

    Note: This is the preferred configuration for unamplified systems as the optical multiplex section (OMS) is protected by a single protection group.

    Wavelength Protection Switch Unamplified Channel Protection

    The following example shows how the WPS4 can provide unamplified channel protection within a network.

    The optical protection switch solution:

    • Provides per optical channel (OCh) protection configuration with diverse network paths on working and protection fiber pairs
    • The default provisioning of LoLightRx threshold (-35dBm) should be used to protect for a fiber break on system fibers.

    Wavelength Protection Switch Amplified Line Protection with an Unamplified Protection Path

    The following example shows how the WPS4 can provide amplified line protection with an unamplified protection path within a network.

    The optical protection switch solution:

    • Is a simple system configuration with diverse network paths on working and protection fiber pairs
      • Amplification allows for extended link budgets with BTI7000 Series LGA/MGA/MGM amplifiers
    • The default provisioning of the LoLightRx threshold (-35dBm) should be used to protect for a fiber break on system fibers
    • Losses on Working and Protection paths should be balanced to within 2dB to avoid the need for amplifier gain adjustments after a protection event. This should be achieved by adding attenuation to the lowest loss path of the two
    • Care must be taken with booster amplifiers as a protection event might trigger APR in EDFA.

    Note: This is the preferred configuration for amplified systems as the optical multiplex section (OMS) is protected by a single protection group.

    Wavelength Protection Switch Amplified Channel Protection with an Amplified Protection Path

    The following example shows how the WPS4 can provide amplified channel protection with an amplified protection path within a network.

    The optical protection switch solution:

    • Is a simple system configuration with diverse network paths on working and protection fiber pairs
      • Amplification allows for extended link budgets.
      • Either or both paths can be amplified.
    • A 50-GHz DWDM operation is supported via ROB496 ROADM

    • A 100-GHz DWDM operation is supported via BTI7000 Series LGA/MGA/MGM optical amplifiers.

    A custom provisioning of the WPS4's LoLightRx threshold is required when installing and provisioning the optical network. See Provisioning customized LoLight-Rx threshold

    Wavelength Protection Switch Amplified Line Restoration with an Unamplified Protection Path

    The following example shows how the WPS4 can provide amplified line restoration with an unamplified protection path.

    The optical restoration switch solution:

    • Is a flexible system configuration with diverse network paths on working and protection fiber pairs
      • Amplification allows for extended link budgets with restoration supported using BTI7800 AMP1 amplifiers
    • Default provisioning of LoLightRx (-35 dBm) should be used to protect for a fiber break on system fibers
    • Losses on Working and Protection paths should be balanced to within 2dB avoid the need for amplifier gain adjustments after a protection event. This should be achieved by adding attenuation to the lowest loss path of the two.

    Note: This is the preferred configuration for amplified systems as the optical multiplex section (OMS) is protected by a single protection group.

    Wavelength Protection Switch Amplified Line Restoration with an Amplified Protection Path

    The following example shows how the WPS4 can provide amplified line restoration with an amplified protection path.

    The optical restoration switch solution:

    • Is a flexible system configuration with diverse network paths on working and protection fiber pairs
      • Amplification allows for extended link budgets using BTI7000 Series LGA/MGA/MGM optical amplifiers.
    • The default provisioning of LoLightRx (-35dBm) should be used to protect for a fiber break on system fibers.
    • The BTI7000 Series LGA/MGA/MGM optical amplifiers will turn off the output in the event of an input LOS event. The fault will propagate to the WPS4 as each downstream amp turns off. This might not complete within 50ms. Therefore this is Rapid Restoration rather than Protection. An automatic switch will still occur.

    Note: It is possible to construct restoration solutions using the other amplifiers in the BTI Series portfolio but there are often deployment restrictions associated with these configurations. If these configurations are required, please contact Juniper Networks Support to evaluate your specific network requirement.

    Provisioning Wavelength Protection Groups and Ports

    Up to four wavelength protection groups can be provisioned on one module. A wavelength protection port can carry either a single wavelength or multiple wavelengths. The wavelength protection group number at the remote node is not required to match the wavelength protection group number of the WPS4 provisioned at the local node.

    The wavelength protection ports are automatically created by the system when the group is provisioned. By default and under no line failures, LnA will be active.

    LnA is the working port and LnB is the protecting port. This is a set configuration and cannot be changed.

    The following table details the wavelength protection groups and their associated physical ports as detailed on Wavelength Protection Switch (WPS4) faceplate.

    wavelength protection group

    Associated wavelength protection group ports

    wavelength protection group #1

    C1 L1B L1A

    wavelength protection group #2

    C2 L2B L2A

    wavelength protection group #3

    C3 L3B L3A

    wavelength protection group #4

    C4 L4B L4A

    The wavelength ports (Cn, LnA, LnB) cannot be created independently of the group, nor can they be deleted. To delete a wavelength port you must delete the wavelength protection group it belongs to.

    When a wavelength protection group is unprovisioned or deleted, the three wavelength ports associated with the group will be automatically deleted and line port A will be forced active, regardless of the received power.

    The wavelength ports do not support the ability to shut down the laser. When the ports are optically connected, the WPS4 is capable of passing light from the Cn OUT, LnA OUT and LnB OUT ports at all times. Even when the module is not powered or when the module is not installed in the chassis.

    Note: The Loss of Light Receive threshold (LoLightRx) must be set according to the optical link budget in order for the protection switch to operate as per specification.

    Provisioning Wavelength Protection Groups

    Use this procedure to provision the wavelength protection groups on a WPS4.

    1. Provision the wavelength protection groups.

      The following examples show how to provision four wavelength protection groups on the WPS4.

      bti7800(config)# protection wavelength group wpsgroup:1/2/1
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/1)# commit 
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/1)# exit 
      bti7800(config)#  
      bti7800(config)# protection wavelength group wpsgroup:1/2/2  
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/2)# commit 
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/2)# exit 
      bti7800(config)#  
      bti7800(config)# protection wavelength group wpsgroup:1/2/3  
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/3)# commit 
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/3)# exit 
      bti7800(config)#  
      bti7800(config)# protection wavelength group wpsgroup:1/2/4  
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/4)# commit 
      bti7800(config-protection-wavelength-group-wpsgroup:1/2/4)#
    2. Optional, provision revertive or non-revertive switching.

      The default is non-revertive. The following example shows how to provision revertive switching.

      bti7800(config-protection-wavelength-group-wpsgroup:1/2/4)# revertive-type revertive bti7800(config-protection-wavelength-group-wpsgroup:1/2/4)# commit bti7800(config-protection-wavelength-group-wpsgroup:1/2/4)#
    3. Optional, provision additional wavelength protection group parameters.

      At any wavelength protection group configuration mode, you can configure the parameters listed in the table below. See also the CLI command protection wavelength group.

      Parameter

      Description

      protid

      A user-defined identifier of the protection group.

      0 to 32 alphanumeric characters

      Default : An empty string

      Note: This identifier is not required to match the remote node.

      remote-protid

      A user-defined identifier of the remote protection group.

      0 to 32 alphanumeric characters

      Default : An empty string

      Note: This identifier is not required to match the remote node.

      custom

      User-defined string.

      0 to 255 alphanumeric characters

      Default : An empty string

    4. Verify the wavelength protection group provisioning is correct.

      Use the show protection wavelength group command to verify if the WPS4 provisioning is correct.

      bti7800# show protection wavelength group
      Group Name            : wpsgroup:1/1/1 
      Working               : wpsport:1/1/L1A 
      Working status        : Active 
      Protecting            : wpsport:1/1/L1B 
      Protecting status     : Standby 
      Protection Id         : WPS456A 
      Remote Id             : WPS456BR 
      Revertive Type        : Non-Revertive 
      Revertive Time        : 600 seconds 
      Custom                : WPS456  
      Group Name            : wpsgroup:1/1/2 
      Working               : wpsport:1/1/L2A 
      Working status        : Active 
      Protecting            : wpsport:1/1/L2B 
      Protecting status     : Standby 
      Protection Id         : WPS459A 
      Remote Id             : WPS459BR 
      Revertive Type        : Non-Revertive 
      Revertive Time        : 600 seconds 
      Custom                : WPS459  

    You have successfully completed this procedure.

    Related Commands

    show running-config

    show protection wavelength group table

    Provisioning Wavelength Protection Ports

    Use the following procedure to provision the wavelength protection ports on the WPS4.

    1. Provision the lolight-rxth

      The following example shows how to configure the loss of light threshold for each port in wavelength group.

      bti7800(config)# protection wavelength port wpsport:1/3/1/C1A lolight-rxth -25.0
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/C1A )# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/C1A )# exit  
      bti7800(config)# protection wavelength port wpsport:1/3/1/L1A lolight-rxth -30.0 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A )# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A )# exit  
      bti7800(config)# protection wavelength port wpsport:1/3/1/L1B lolight-rxth -30.0 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B )# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B )# exit  

      Note: The lolight-rxth must be configured according to the optical link budget in order for the protection switch to operate as per specification. See also WPS4 protection and rapid restoration configurations and Provisioning customized LoLight-Rx threshold.

    2. Optional, provision additional wavelength port parameters.

      The following additional wavelength port parameters can be provisioned.

      Parameter

      Description

      id

      A user-defined identifier of the local wavelength protection port.

      0 to 32 alphanumeric characters

      Default : An empty string.

      Note: This identifier is not required to match the remote node.

      remote-id

      A user-defined identifier of the remote wavelength protection port.

      0 to 32 alphanumeric characters

      Default : An empty string.

      Note: This identifier is not required to match the remote node.

      custom

      User-defined string.

      0 to 255 alphanumeric characters

      Default : An empty string.

    3. Verify the wavelength port provisioning is correct.

      Use the show protection wavelength port command to verify if the wavelength protection port provisioning is correct.

      bti7800# show protection wavelength port
      Port Name            : wpsport:1/1/C1 
      Protection Status    : 
      Id                   : WPS43811C1 
      Remote Id            : WPS43811C1R 
      Custom               : RED346711C1 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -3.5 dBm  
      Port Name            : wpsport:1/1/C2 
      Protection Status    : 
      Id                   : WPS43811C2 
      Remote Id            : WPS43811C2R 
      Custom               : RED346711C2 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -3.5 dBm  
      Port Name            : wpsport:1/1/L1A 
      Protection Status    : Active 
      Id                   : WPS43811L1A 
      Remote Id            : WPS43811L1AR 
      Custom               : RED346711L1A 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -2.5 dBm  
      Port Name            : wpsport:1/1/L1B 
      Protection Status    : Standby 
      Id                   : WPS43811L1B 
      Remote Id            : WPS43811L1BR 
      Custom               : RED346711L1B 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -2.6 dBm  
      Port Name            : wpsport:1/1/L2A 
      Protection Status    : Active 
      Id                   : WPS43811L2A 
      Remote Id            : WPS43811L2AR 
      Custom               : RED346711L2A 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -2.5 dBm  
      Port Name            : wpsport:1/1/L2B 
      Protection Status    : Standby 
      Id                   : WPS43811L2B 
      Remote Id            : WPS43811L2BR C
      ustom                : RED346711L2B 
      LoLightRx Th         : -35.0 dBm 
      Opt.Pw.RX            : -2.6 dBm     
    4. Optional, view wavelength port statistics

      Use the show statistics command to view wavelength port statistics.

      bti7800# show statistics current wpsport:1/1/L1A
      Current Statistics for wpsport:1/1/L1A          
      
             TIMESTAMP            LENGTH   VALIDITY  %SAMPLES            NAME                 VALUE 
      --------------------------  ---------  --------  -------  ----------------------------   ------- 
      2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Optical power received     ...-2.50 dBm 
      2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Min. optical power received ..-60.0 dBm 
      2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Max. optical power received ..-2.50 dBm 
      2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Avg. optical power received ..-14.45dBm 
      2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Optical power received     ...-2.50 dBm 
      2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Min. optical power received ..-2.50 dBm 
      2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Max. optical power received ..-2.50 dBm 
      2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Avg. optical power received ..-2.50 dBm 
      2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Optical power received     ...-2.50 dBm 
      2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Min. optical power received ..-60.0 dBm 
      2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Max. optical power received ..-2.50 dBm 
      2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Avg. optical power received ..-14.42dBm 
      2015-05-26T13:31:54+00:00   1Day       partial   0.5      Optical power received     ...-2.50 dBm 
      2015-05-26T13:31:54+00:00   1Day       partial   0.5      Min. optical power received ..-60.0 dBm 
      2015-05-26T13:31:54+00:00   1Day       partial   0.5      Max. optical power received ..-2.50 dBm 
      2015-05-26T13:31:54+00:00   1Day       partial   0.5      Avg. optical power received ..-14.42dBm  

    You have successfully completed this procedure.

    Related Commands

    show running-config

    show protection wavelength port

    Provisioning Customized LoLightRx Thresholds

    Use this procedure to set customized LoLightRx thresholds. For additional information see WPS4 protection and rapid restoration configurations

    Provisioning Customized LoLightRx Threshold

    You will be required to provision customized LoLightRx thresholds in the following network configurations:

    • 50-GHZ DWDM networks deploying WPS4 channel protection with BTI7000 Series ROB496 ROADM
    • 100-GHz DWDM networks deploying WPS4 channel protection with BTI7000 Series LGA/MGA/MGM optical amplifiers.

    Note: You might be required to provision the LoLightRx thresholds in network configurations which are not defined in WPS4 protection and rapid restoration configurations. Contact Juniper Networks Support if you require further information.

    Note: In networks deploying WPS4 channel protection with BTI7000 Series LGA/MGA/MGM optical amplifiers, this procedure should also be performed every time there are significant changes to the channel powers. We recommend that you reset the LoLightRx threshold if the receive power of a channel changes by more than +/- 2.5dB.

    Before beginning this procedure ensure the ROB496 ROADM or Amp and the WPS4s are installed, provisioned and are connected in the network. The wavelength protection groups must be provisioned. The ROB496 ROADM or Amp must be provisioned with the channels up. The protection and working paths must be alarm free.

    1. Note the received power on the wavelength protection ports LnA and LnB for the required channel.

      The following commands show examples of how to display the received power on L1A and L1B.

      bti7800# show statistics current wpsport:1/1/L1A
      bti7800# show statistics current wpsport:1/1/L1B
    2. Calculate the customized LoLightRx threshold values for LnA and LnB using the equations listed below.
      Cn = ROB496 ROADM
       LoLightRx threshold for LnA = Received Power on LnA (dBm)+ (- 6 dB) 
      LoLightRx threshold for LnB = Received Power on LnB (dBm)+ (- 6 dB)
      Cn = BTI7000 Series LGA/MGA/MGM optical amplifiers
      LoLightRx threshold for LnA = Received Power on LnA (dBm)+ (- 4.5 dB) 
      LoLightRx threshold for LnB = Received Power on LnB (dBm)+ (- 4.5 dB)

      The following examples show how to calculate the LoLightRx thresholds.

      Example 1: Cn = ROB496 ROADM

      For example if the received power at LnA was -10 dBm and the received power at LnB was -15 dBm then the following applies:

      Customized LoLightRx threshold LnA = -10 dBm - 6 dB = -16 dBm
      Customized LoLightRx threshold LnB = -15 dBm - 6 dB = -21 dBm

      Example 2: Cn = BTI7000 Series LGA/MGA/MGM optical amplifiers

      For example if the received power at LnA was -10 dBm and the received power at LnB was -15 dBm then the following applies:

      Customized LoLightRx threshold LnA = -10 dBm - 4.5 dB = -14.5 dBm
      Customized LoLightRx threshold LnB = -15 dBm - 4.5 dB = -19.5 dBm
    3. Provision the LoLightRx thresholds for LnA and LnB.

      Example 1: Provisioning the LoLightRx thresholds for LnA and LnB when Cn = ROB496 ROADM

      bti7800(config)# protection wavelength port wpsport:1/1/1/L1A lolight-rxth -16.0
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A) # commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A)# exit  
      bti7800(config)# protection wavelength port wpsport:1/3/1/L1B lolight-rxth -21.0 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B)# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B)# exit 

      Example 2: Provisioning the LoLightRx thresholds for LnA and LnB when Cn = BTI7000 Series LGA/MGA/MGM optical amplifiers

      bti7800(config)# protection wavelength port wpsport:1/1/1/L1A lolight-rxth -14.5
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A)# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1A)# exit  
      bti7800(config)# protection wavelength port wpsport:1/3/1/L1B lolight-rxth -19.5 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B)# commit 
      bti7800(config-protection-wavelength-port-wpsport:1/3/1/L1B)# exit 
    4. Repeat this procedure for any other ports provisioned on the WPS4s.

    Performing User-Invoked Switches on the WPS4

    Manual Switch

    A manual switch is applied to the active line and results in a switching traffic away from the active line to the current standby line. The standby line will then become the new active line. A manual switch is not permitted if the standby line has a loss of signal. A manual switch does not disable automatic switching and does not require to be released.

    Forced Switch

    A forced switch is applied to the active line and results in switching traffic away from the active line to the current standby line. The standby line will then become the new active line. A forced switch is permitted even if the standby line is not alarm free. A forced switch can be provisioned even when the WPS4 is not present. It will persist until it is released.

    Lockout Switch

    A lockout switch is applied to the standby line and results in preventing traffic from switching to the standby line. A lockout switch is permitted even if the standby line is not alarm free. A lockout switch can be provisioned even when the WPS4 is not present. It will persist until it is released.

    Note: Lockout and forced protection switch provisioning will persist in the system database.

    Note: The commit function is not required when performing a user-invoked switch.

    Revertive and Non-revertive Wavelength Protection Switching

    In revertive switch operation, traffic will switch back to the working line after the fault has cleared and the wait-to-revert time has elapsed. The wait-to-revert time is 600 seconds and cannot be changed. Automatic, manual, forced and lockout switches will revert after they are released if the active line after release is protecting line (LnB).

    In non-revertive switch operation traffic will not switch back to the active line. The default is non-revertive.

    Performing a Manual Wavelength Protection Switch

    User-invoked wavelength protection switches can be performed either in the operational or configuration mode. The show protection wavelength group table is performed in the operational mode only.

    Note: The commit function is not required when performing a user-invoked switch.

    1. Performing a manual wavelength protection switch

      The following example shows how to perform a manual switch when the currently active line is L1A.

      bti7800# protection wavelength switch manual wpsport:1/2/L1A
      bti7800# 

    You have successfully completed this procedure.

    Related Commands

    show protection wavelength group table

    Performing a Forced Wavelength Protection Switch

    User-invoked wavelength protection switches can be performed either in the operational or configuration mode. The show protection wavelength group table is performed in the operational mode only.

    A forced switch is performed on the active line and results in a switch away from the active line. The active line then becomes the standby line.

    Note: The commit function is not required when performing a user-invoked switch.

    1. Performing a forced wavelength protection switch.

      The following example shows how to perform a forced switch when the currently active line is L1A.

      bti7800# protection wavelength switch forced wpsport:1/2/L1A
      bti7800# 
    2. Releasing a forced switch.

      The following example shows how to release a forced switch when the currently standby line is L1B.

      bti7800# protection wavelength switch release wpsport:1/2/L1B
      bti7800#

    You have successfully completed this procedure.

    Related Commands

    show protection wavelength group table

    Performing a Lockout Wavelength Protection Switch

    User-invoked wavelength protection switches can be performed either in the operational or configuration mode. The show protection wavelength group table is performed in the operational mode only.

    A lockout switch is performed on the standby line and results in preventing traffic from switching to that line.

    Note: The commit function is not required when performing a user-invoked switch.

    1. Performing a lockout switch

      The following example shows how to perform a lockout when the currently standby line is L2B:

      bti7800# protection wavelength switch lockout wpsport:1/2/L2B
      bti7800# 
    2. Releasing a lockout switch

      The following example shows how to release a lockout switch when the currently standby line is L2B:

      bti7800 # protection wavelength switch release wpsport:1/2/L2B
      bti7800# 

    You have successfully completed this procedure.

    Related Commands

    show protection wavelength group table

    Wavelength Protection Switch Alarms

    Alarms and conditions can be viewed using the CLI. Autonomous notifications are available via NETCONF and SNMP.

    The following alarms are supported on the WPS4:

    • Port alarms:
      • loLightRx
    • Module alarms:
      • eqptMiss
      • eqptMism

    Wavelength Protection Switch Performance Monitoring

    Performance monitoring is conducted on provisioned ports. Current and historical statistics are supported.

    The types of physical layer performance monitoring parameters are listed in the following table:

    Monitored Type

    Montype

    Description

    Units

    Optical Power Received

    OPR

    The power of the optical signal received on a port.

    dBm

    The optical power received on each port (Cn, LnA and LnB) is monitored and can be viewed using the CLI command show statistics.

    An example is shown below.

    bti7800# show statistics current wpsport:1/1/L1A
    Current Statistics for wpsport:1/1/L1A          
    
            TIMESTAMP            LENGTH   VALIDITY  %SAMPLES            NAME                 VALUE 
    --------------------------  ---------  --------  -------  ----------------------------   ------- 
    2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Optical power received     ...-2.50 dBm 
    2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Min. optical power received ..-60.0 dBm 
    2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Max. optical power received ..-2.50 dBm 
    2015-05-26T13:31:54+00:00   unTimed    complete  100.0    Avg. optical power received ..-14.45dBm 
    2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Optical power received     ...-2.50 dBm 
    2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Min. optical power received ..-2.50 dBm 
    2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Max. optical power received ..-2.50 dBm 
    2015-05-26T13:40:00+00:00   1Minute    partial   38.3     Avg. optical power received ..-2.50 dBm 
    2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Optical power received     ...-2.50 dBm 
    2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Min. optical power received ..-60.0 dBm 
    2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Max. optical power received ..-2.50 dBm 
    2015-05-26T13:31:54+00:00   15Minute   partial   56.7     Avg. optical power received ..-14.42dBm 
    2015-05-26T13:31:54+00:00   1Day       partial   0.5      Optical power received     ...-2.50 dBm 
    2015-05-26T13:31:54+00:00   1Day       partial   0.5      Min. optical power received ..-60.0 dBm 
    2015-05-26T13:31:54+00:00   1Day       partial   0.5      Max. optical power received ..-2.50 dBm 
    2015-05-26T13:31:54+00:00   1Day       partial   0.5      Avg. optical power received ..-14.42dBm  

    Modified: 2017-07-06