Services
7210 SAS M Services Guide Page 57
      no shutdown
  exit
# Control Channel for the Sub-Ring using a virtual link. This is 
# a data channel as far as Ring 1 configuration. Other Ring 1 
# nodes also need this VID to be configured. 
  vpls 100 customer 1 create
      description "Control VID 100 for Ring 2 Interconnection"
      split-horizon-group "s1" create //Ring Split horizon Group
      exit
      stp shutdown 
      sap 1/1/1:100 split-horizon-group "s1" eth-ring 1 create
          stp shutdown 
      exit
      sap 1/1/4:100 split-horizon-group "s1" eth-ring 1 create
          stp shutdown 
      exit
      sap 1/1/3:100 eth-ring 2 create
          stp shutdown 
      exit
      no shutdown
  exit 
Note: If the Sub Ring has been configured as a non-virtual-link, the configuration above will be 
the following: 
  vpls 100 customer 1 create
      description "Control VID 100 for Ring 2 Interconnection"
      sap 1/1/3:100 eth-ring 2 create
          stp shutdown 
      exit
      no shutdown
  exit 
Figure 11: 0-6 Sub-Ring Homed to VPLS