Configuration guidelines

The following configuration guidelines must be followed to configure a split horizon group:

1. Create a split horizon group in the config prompt. The group name must be unique across the system.

   7210-SAS1>config#info
   #--------------------------------------------------
   echo "Split-horizon-group Configuration"
   #--------------------------------------------------
       split-horizon-group access create 
           description ‟Block access between access Ports”
       split-horizon-group access-uplink create
           description "Block access between access-uplink Ports"
       exit 
   #-------------------------------------------------- 
   7210-SAS1>config#
   

2. Associate ports 1/1/4 and 1/1/5 with split horizon group ‟access” By default all ports are access ports. The default Ethernet encapsulation for access port is ‟null”.

   7210-SAS1>config#info
   #--------------------------------------------------
   echo "Port Configuration"
   #--------------------------------------------------
       port 1/1/4
           split-horizon-group access
           ethernet
           exit
           no shutdown
   exit 
       port 1/1/5
           split-horizon-group access
           ethernet
           exit
           no shutdown
     exit
   #--------------------------------------------------
   
   
   7210-SAS1>config#
   

3. Configure ports 1/1/1 and 1/1/3 as access uplink and associate these ports with split horizon group ‟access-uplink” default Ethernet encapsulation for access uplink port is ‟qinq”.

   7210-SAS1>config# info
   #--------------------------------------------------
   echo "Port Configuration"
   #--------------------------------------------------
       port 1/1/1
           split-horizon-group access-uplink
           ethernet
                  mode access uplink
           exit
           no shutdown
   exit 
       port 1/1/3
           split-horizon-group access-uplink
           ethernet
                  mode access uplink
           exit
           no shutdown
     exit
   #--------------------------------------------------
   
   
   7210-SAS1>config#
   

4. Create a VPLS instance 100.

   #--------------------------------------------------
   echo "Service Configuration"
   #--------------------------------------------------
       service
             customer 2 create
             exit
            vpls 100 customer 2 create
               stp
                   shutdown
               exit
               sap 1/1/1:100.* create
               exit
               sap 1/1/3:100.* create
               exit
               sap 1/1/4 create
               exit
               sap 1/1/5 create
               exit
               no shutdown
       exit
   ...
   #--------------------------------------------------
   

   Note:

   A split horizon on a port must be configured before creating any SAPs associated with that port.