Create ELAN services with Hub and Spoke

The type of service creation which involves one hub connectivity to minimum of two spokes which are connected to UNIs on the other end, are referred as hub and spoke services. Only one spoke is allowed for a hub (if there are more than 1 hub in the service).

Perform the following steps to create an ELAN service with Hub and Spokes:

1. Go to Configuration > Layer 2 > Services menu and click Complete Services option. The Complete Services page is displayed.
2. Click on . A series of new windows will be displayed for step-by step creation of a service.

• Step 1: General Attributes
  1. Enter a name for the service and select the Technologies as 'MPLS-TP'.
  2. Select the Service Type as 'ELAN' and Mesh as 'Hub and Spoke'. The user can enable or disable traffic between spokes (in case of two or more spokes) in a hub and spokes network. The inter spokes traffic is enabled by default but if the user desires to disable it, uncheck the Disable Inter Spoke Traffic check box.
  3. Do one of the following:

     > To create the service in Non Qos Domain, select the Domain as 'Non Qos Domain'.

     > To create the service in Qos Domain, select the Domain as 'Qos Domain'.

     > To create the service in any of the two domain, select the Domain as "All Domain'.

  4. Do one of the following:

     > To disable OAM on the service, select OAM as 'None' from drop down menu.

     > To enable OAM on the service, select OAM as 'BFD Config'. Select the BFD Configuration parameters displayed.

     > To enable PWSM on the service, select OAM as 'Pw Status'. Select the PW Status Configuration parameters displayed.

  5. Click Enable PSC to enable Protection State Coordination, if desired.
  6. Select Enable CFM check box to enable Connectivity Fault Management, if desired. Enter rest other details and click Next.

     

General Attributes parameters

• Step 2: Adding End Points
  1. Click Add Hub on End Points page to add the hub and the UNIs for the service creation.
  2. Under Network element column, select the desired node as the Hub.

     There are two ways of searching the desired node as follows:

     > Enter the IP address/user label of the node in the text box provided and click (Search Node by IP Address or UserLabel). Or,

     > Click (Add switches using map view). Select desired NEs from the Topology selection window launched. Click Done. Note that only one node can be added a time.

  3. For the selected endpoint, add Uni by selecting the check box against the desired port and do one of the following:

     > If Domain is selected as 'Non Qos Domain' or All Domain' in General Attributes page, enter the VLAN value only under First Tag column. For All Domain the UNI port can be associated with TCProfile and CoS-0.

     > If Domain is selected as 'Qos Domain', enter the VLAN value under First Tag column and associate a Priority Mapping Profile or DSCP Mapping Profile or a pair of TCProfile and COS values.

     To view the bandwidth utilization, select a port and click View BW. View Port BW Utilization window is displayed with the bandwidth utilization details of Ingress and Egress Port.

     To view the used VLAN range, select the port and click Show Used VLans. View Used VLAN Range(s) window is displayed with a list of used VLAN values for the selected port.

     

  4. Click Add Uni button and click Ok.

     To add another Hub and Unis, repeat Step a to d (Step 2: Adding End Points).

     

  5. Click Add Spoke on End Points page to add spokes for the selected Hub.
  6. Under Network element column, select the desired node as the Spoke.
  7. Add Uni by selecting the check box against the desired port on the selected spoke. Enter the VLAN value under First Tag column.

     

  8. Click Add Uni button and click Ok. User must select at least two spokes, if only one Hub is selected.

     To add more Spokes and Unis, repeat Step e to h (Step 2: Adding End Points). The following figure shows the Hub and Spokes added:

     

  9. Click Next. The PseudoWires page is displayed.
• Step 3: PseudoWires

The PseudoWires page of Create Service provides the options to add or remove protection, selection of pseudowire path manually or automatic path detection, MA configuration, and Qos Configuration.

• To edit MA configuration parameters, click MA Configuration tab and select or enter the required values.
• To add or remove protection, select/un-select the (Protection) check box along with the check boxes against each of the two end points displayed under PseudoWires column. The check boxes will be selected by default.
• To assign bandwidth at individual pseudowire level, select the desired endpoints and click Qos Configuration tab. For the predefined CoS value, assign the bandwidth for A and Z end of the pseudowire. For the predefined CoS value, user can manually assign the bandwidth (CIR and PIR) for A and Z end of the pseudowire.

  NOTE 1: CoS Value at UNI ports would be considered for bandwidth calculation only if bandwidth values for the CoS is not specified for the Pseudowire.

  NOTE 2: Service creation will fail if the bandwidth defined in TCProfile attached to any UNI port in the service is not available on the port. The user can then manually assign the bandwidth value for CIR and PIR in Qos Configuration tab.

• Pseudowire path selection (both Work and Protect) can be done in two ways as follows:

For find pseudowire path automatically,

1. First enable Find Path button by selecting the (Auto Path) check box and the check boxes against the added endpoints. The check boxes will be selected by default.
2. Click Find Path. A success message is displayed. Path is found successfully.
3. Click OK and select a pseudowire endpoint (Sw1--Sw2) to view its path under the View tab.

   Graphical representation of the pseudowire detected automatically is displayed under the View tab as shown in the following figure. Details of work and protect path are available under Details column:

   

NOTE: When finding the pseudowire path automatically, the user is provided an option to exclude switches/tunnels. Select Excluded Switches and Excluded Tunnels tab. Click Add button and select the desired nodes and/links. Click Exclude Nodes or Exclude Links followed by Done. Remove button can be used to delete the added data. Select Find Path. Pseudowire path is calculated once again, excluding the selected switches/tunnels in the path.

For find pseudowire path manually,

1. Un-check the (Auto Path) check box and select a pseudowire. The Manual Path button is displayed under the View tab.
2. Click Manual Path. The topology selection window is displayed.
3. Select a direct path/link between the two selected end points (highlighted in black) and click Add Work. The work path is added and the link color changes from pink to blue.
4. To add protection, select another direct path/link between the two selected end points and click Add Protect. The protect path is added and represented in blue dashed line.

   

5. Click Done. Graphical representation of the pseudowire added is displayed on the PseudoWires page under View tab along with work and protect path details under Details column as shown in the following figure:

   

• Similarly, add Work and Protect path for other pseudowires.
• Click Next.

  NOTE: An additional PW Status Info page will be displayed if OAM was selected as 'Pw Status' on General Attributes page. For more information refer to Step 4: PW Status Info in the topic Create MPLS-TP service with PWSM.

• Step 4: Advance Configuration

On Advance Configuration window, Storm Control Configuration is performed. Select the Enable Broadcast/MultiCast Stormcontrol check box if desired and then enter the BroadCast/Multicast Stormcontrol value in Mbps in the text box displayed. Click Next to view the summary of the ELAN service.

• Step 5: Summary

On Summary page of Create Service, the hub and spokes switches connected by pseudowires is displayed as shown in the following figure:

1. From the drop down menu, select Create to create the service or Create and Activate to create and activate the service as desired.
2. Click Finish. A success message is displayed. Service creation command is sent successfully.
3. Click OK. The status of the service can be checked in Complete Services page.