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Configuration Guide - Ethernet Switching

S1720, S2700, S5700, and S6720 V200R012(C00 and C20)

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Application of Intersecting RRPP Rings of Multi-Instance on a MAN

Application of Intersecting RRPP Rings of Multi-Instance on a MAN

In Figure 17-24, Customer Edges (CEs) are dual-homed to Underlayer Provider Edges (UPEs) and two RRPP rings are formed.

Figure 17-24  Intersecting RRPP rings of multi-instance in a MAN (CEs supporting RRPP multi-instance)

In Figure 17-24, four UPEs and one PE-AGG construct a ring and RRPP multi-instance is configured on the ring. Traffic on the RRPP ring flows into the backbone network through the PE-AGG.

Two RRPP rings are configured on the four UPEs and the PE-AGG: ring 1 in domain 1 and ring 1 in domain 2. Domain 1 processes data in VLANs 101 to 200 and domain 2 processes data in VLANs 1 to 100.

Four RRPP rings are configured on the two CEs and two UPEs: ring 2 in domain 1, ring 2 in domain 2, ring 3 in domain 1, and ring 3 in domain 2.

RRPP rings provide master/slave protection and load balancing for the Layer 2 services in VLANs 1 to 200. When all the nodes and links on the rings are working properly, traffic sent to sub-rings is transmitted along different paths according to the service VLAN, implementing load balancing.

However, CEs may not support RRPP multi-instance, like the example shown in Figure 17-25. The major ring constructed by four UPEs and one PE-AGG belongs to multiple domains; however, the sub-rings constructed by CEs and UPEs belong to only one domain. Load balancing is not implemented on the sub-ring, and data in all VLANs is transmitted along the same path on the sub-ring. After entering the major ring, the traffic sent to sub-rings is transmitted along different paths according to the service VLAN, implementing load balancing.

Figure 17-25  Intersecting RRPP rings of multi-instance on a MAN (CEs not supporting multi-instance)
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Updated: 2018-12-24

Document ID: EDOC1100038339

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