Huawei quidway s7700 Configuration Manual page 693

Smart routing switch

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Quidway S7700 Smart Routing Switch

Configuration Guide - VPN

Issue 01 (2011-07-15)

Figure 7-6 Typical networking of a CE dual homed to the VPLS network

7-6, a ring is formed by PE2, PE3, and the CE. Therefore, STP needs

to be enabled on the ring to prevent the loop.

After STP priorities are configured on PE2 and PE3, the root bridge is determined, the

redundant link on the CE side are blocked, and consequently, the loop is prevented.

If the STP mode is MSTP, all PEs must be configured in the same MST region.

Inter-AS VPLS network

7-7, PE1, Switch 1, and Switch 3, all belonging to AS 1, are fully

meshed in the VPLS network. PE2, Switch 2, and Switch 4, all belonging to AS 2, are fully

meshed in the VPLS network.

Figure 7-7 Typical networking of inter-AS VPLS

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7 VPLS Configuration