Procedure 13-3.1: Configure new Ethernet ring protection (ERP) ring

- Overview

Use this procedure to configure a new Ethernet protection ring (ERP). See Figure 13-5, Ethernet ring protection.

Refer to the Alcatel-Lucent 1850 Transport Service Switch (TSS-5) Command Line Interface Guide, for help on using CLI commands.

- Before you begin

Prior to performing this procedure:

  • Determine the node that will be the RPL Owner.

  • Determine the port associated with the RPL link at the RPL Owner node.

  • Determine the ports at each node associated with the ERP.

  • Determine a VLAN to be used by the ERP for signaling switching requests (using R-APS PDUs). The VLAN must be a VLAN that is presently unused at every node in the ring. The same VLAN must then be used for the ERP at each node in the ring.

  • If required, determine the ERP Maintenance Domain Level (0-7). This command is optional. The ERP Maintenance Level must be the same at every node in the ERP. This value is independent of any Service OAM MD Level provisioned for the ports’ VLANs.

Important!

ERP may not be configured on ports with Layer 2 control protocol (L2CP) tunneling enabled. Use the show port command from Privileged EXEC Mode to determine if L2CP Tunnel is enabled or disabled. Use local procedures to resolve this conflict.

Step
 
1

At the node that will be the RPL Owner, login to the VLNC4x.

Result:

The User EXEC prompt [(ALU switching)>] displays.

2

Enter the Global Config mode:

  1. From the User EXEC prompt, enter enable to enter the Privileged EXEC mode.

  2. From the Privileged EXEC prompt, enter configure to enter the Global Config mode.

3

At the node which will be the RPL Owner, create an ERP instance identified by name and enter the Erp Config mode.

From the Global Config prompt, enter erp <name>, where <name> is a 1 to 31 alphanumeric character string.

Example: (ALU Switching) (Config)# erp ring1.

Result:

The command creates an ERP instance and changes to the Erp Config mode [(ALU Switching) (Config erp ring1)#].

4

Associate two optical faceplate ports with the newly created ERP.

Layer 2 control protocol tunneling must not be enabled on ports that are part of a protected Ethernet ring.

From the Erp Config prompt, enter associate <port1> <port2>.

Example: (ALU Switching)(Config erp ring1)# associate d2-1 d2-2.

  • Only equipped faceplate ports may be associated with an ERP.

  • If the socket contains an electrical SFP, it is alarmed.

  • The order of the two port parameters is not signficant.

  • A faceplate port may only be associated with one ERP. Ports to be associated with an ERP cannot be part of a LAG or a spanning tree.

  • If port d2-4 is specified, it cannot be set to use the backplane interface.

  • Ports must be associated with an ERP before the ERP can be enabled.

5

From the Interface Config mode, disable the port associated with the chosen ring protection link (RPL).

For example, exit down to the Global Config mode. Enter interface <port>, where <port> is the AID of the port associated with the RPL. Then enter shutdown.

Example:

  1. (ALU Switching) (Config)# interface d2-1.

  2. (ALU Switching) (interface d2-1)# shutdown.

6

Exit Interface Config mode. Enter erp <name>, where name is the name of the ERP instance you are configuring. For example: (ALU Switching) (Config)# erp ring1.

7

Designate the port for the Ring Protection Link (RPL) for the ring. This command also makes this node the RPL Owner.

From the Erp Config mode, enter ring-protection-link <port> where <port> is the AID of the port associated with the chosen ring protection link.

Example: (ALU Switching)(Config erp ring1)# ring-protection-link d2-1.

8

If required, configure the Wait-to-Restore (WTR) time for the ERP. This command is optional.

From the Erp Config mode, enter wait-to-restore <time>, where <time> is in the range of 1-12 minutes, default 5.

The WTR time is the length of time after a failure recovers before the ERP reverts to the default configuration (with the RPL blocked). WTR may only be provisioned at the RPL Owner node. The ITU-T G.8032 standard requires the WTR time to be from 5 to 12 minutes.

Example: (ALU Switching)(Config erp ring1)# wait-to-restore 7.

9

If required, configure the ERP guard timer. This command is optional.

From the Erp Config mode, enter guard <time>, where <time> is in the range 10-2000 msec, in 10 msec steps. The default is 500.

Example: (ALU Switching)(Config erp ring1)# guard 200.

10

If required, configure the ERP Maintenance Domain Level. This command is optional. The ERP Maintenance Level must be the same at every node in the ERP.

From the Erp Config mode, enter md-level <level>, where <level> is in the range 0-7. The default is 1.

Example: (ALU Switching)(Config erp ring1)# md-level 2.

11

Designate the VLAN to be used by the ERP for signaling switching requests (using R-APS PDUs).

From the Erp Config mode, enter vlan <vlanid>, where <vlanid> is in the range of 1-39651-4094.

For example: (ALU Switching) (Config erp ring1)# vlan 2000.

The ERP signaling VLAN is not used for regular traffic, therefore it does not need to be previously created in the vlan database (vlan database, vlan <vlanid>.)

The same vlanid must be used at each node in the ERP ring and should not be used on the same ports for other purposes. The vlanid can be used on other ports for other reasons (including the R-APS VLAN channel of another instance of ERP on this pack).

12

From the Erp Config mode, enter no shutdown to enable the ERP at the RPL Owner node. For example: (ALU Switching) (Config erp ring1)# no shutdown.

13

Login to the next node in the ring and perform the following:

  1. From the Global Config prompt, enter erp <name>, where name is the name of the ERP instance you are configuring.

    Example: (ALU Switching) (Config)# erp ring1.

  2. Associate two optical faceplate ports with the newly created ERP.

    Layer 2 control protocol tunneling must not be enabled on ports that are part of a protected Ethernet ring.

    From the Erp Config mode, enter associate <port1> <port2>.

    Example: (ALU Switching)(Config erp ring1)# associate d2-1 d2-2.

  3. If required, configure the ERP guard timer. This command is optional.

    From the Erp Config mode, enter guard <time>, where <time> is in the range 10-2000 msec, in 10 msec steps. The default is 500.

    Example: (ALU Switching)(Config erp ring1)# guard 200.

  4. If required, configure the ERP Maintenance Level. This command is optional. The ERP Maintenance Level must be the same at every node in the ERP.

    From the Erp Config mode, enter md-level <level>, where <level> is in the range 0-7. The default is 1.

    Example: (ALU Switching)(Config erp ring1)# md-level 2.

  5. Designate the VLAN to be used by the ERP.

    From the Erp Config mode, enter vlan <vlanid>, where <vlanid> is in the range of 1-39651-4094.

    Example: (ALU Switching) (Config erp ring1)# vlan 2000.

    The same vlanid must be used at each node in the ring.

  6. When the links are working, enable the ERP

    From the Erp Config mode, enter no shutdown to enable the ERP at this node.

    Example: (ALU Switching) (Config erp ring1)# no shutdown.

14

Repeat Step 13 at each node around the ring until all nodes are configured.

15

Login to the RPL Owner node.

From the Interface Config mode, enable the port associated with the ring protection link (RPL).

For example, exit down to the Global Config mode. Enter interface <port>, where <port> is the AID of the port associated with the RPL. Then enter no shutdown.

Example: (ALU Switching) (interface d2-1)# no shutdown.

End of steps

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