Configuring load balancing with management VPLS

With the concept of management VPLS, it is possible to load balance the user VPLS services across the two protecting nodes. This is done by creating two management VPLS instances, where both instances have different active QinQ SAPs (by changing the STP path-cost). When different user VPLS services are associated with either the two management VPLS services, the traffic will be split across the two QinQ SAPs. Load balancing can be achieved in SAP protection scenarios.

The following figure is an example configuration for load balancing across management VPLS.

Figure: Example configuration for load balancing across with management VPLS

Note: the STP path costs in each peer node should be reversed.

— (for 7210 SAS-D)config>service# vpls service-id [customer customer-id] [create][m-vpls] [svc-sap-type {null-star | any | dot1q-preserve}] [customer-vid vlan-id]
    — description description-string
    — sap sap-id create
    — managed-vlan-list
        — range vlan-range
    — stp
    — no shutdown

The following is a sample VPLS configuration output.

*A:ALA-1>config>service# info
----------------------------------------------
        vpls 100 customer 1 m-vpls svc-sap-type any create
            stp
                no shutdown
            exit
            sap 1/1/2:100.* create
                managed-vlan-list
                    range 1-10
                exit
                stp
                    path-cost 1
                exit
            exit
            sap 1/1/3:500.* create
                shutdown
                managed-vlan-list
                    range 1-10
                exit                  
            exit
            no shutdown
        exit
        vpls 200 customer 6 m-vpls svc-sap-type any create
            stp
                no shutdown
            exit
            sap 1/1/2:1000.* create
                managed-vlan-list
                    range 110-200
                exit
            exit
            sap 1/1/3:2000.* create
                managed-vlan-list
                    range 110-200
                exit
                stp
                    path-cost 1
                exit
            exit
            no shutdown
        exit
        vpls 101 customer 1 svc-sap-type any create
            stp
                shutdown
            exit
            sap 1/1/1:100 create
            exit
            sap 1/1/2:1.* create
            exit
            sap 1/1/3:1.* create
            exit
            no shutdown
        exit
        vpls 201 customer 1 svc-sap-type any create
            stp
                shutdown
            exit
            sap 1/1/1:200 create
            exit
            sap 1/1/2:110.* create
            exit
            sap 1/1/3:110.* create
            exit
            no shutdown
        exit                          
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