348 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Metro Ring Protocol (MRP)
10
Master VLANs and customer VLANs
All the ring ports must be in the same VLAN. Placing the ring ports in the same VLAN provides
Layer 2 connectivity for a given customer across the ring. Figure 67 shows an example.
FIGURE 67 Metro ring – ring VLAN and customer VLANs
Notice that each customer has their own VLAN. Customer A has VLAN 30 and Customer B has
VLAN 40. Customer A host attached to Switch D can reach the Customer A host attached to Switch
B at Layer 2 through the ring. Since Customer A and Customer B are on different VLANs, they will
not receive each other traffic.
You can configure MRP separately on each customer VLAN. However, this is impractical if you have
many customers. To simplify configuration when you have a lot of customers (and therefore a lot of
VLANs), you can use a topology group.
Customer B
VLAN 40
Customer A
VLAN 30
VLAN 40
Switch B
Switch D
Port2/1
Port4/1
Port1/2
Port1/1
Port2/1 Port4/1
Port1/2
Port1/1
Switch D
ring 1
interfaces 1/1, 1/2
topology group 2
master VLAN 2 (1/1, 1/2)
member VLAN 30 (1/1, 1/2, 2/1)
member VLAN 40 (1/1, 1/2, 4/1)
interfaces 1/1, 1/2
topology group 2
master VLAN 2 (1/1, 1/2)
member VLAN 30 (1/1, 1/2, 2/1)
member VLAN 40 (1/1, 1/2, 4/1)
