Configuration Guide User guide

FastIron Configuration Guide 615
53-1002494-02
Metro Ring Protocol
On each node that will participate in the ring, you specify the ring ID and the interfaces that will be
used for ring traffic. In a multiple ring configuration, a ring ID determines its priority. The lower the
ring ID, the higher priority of a ring.
A ring ID is also used to identify the interfaces that belong to a ring.
FIGURE 43 Interface IDs and types
For example, in Figure 43, the ID of all interfaces on all nodes on Ring 1 is 1 and all interfaces on
all nodes on Ring 2 is 2. Port 1/1 on node S1 and Port 2/2 on S2 have the IDs of 1 and 2 since the
interfaces are shared by Rings 1 and 2.
Example 1 Example 2
Ring 1
Ring 2
Port1/1
VLAN 2
Port2/2
VLAN 2
S1
S2
Ring 1 Ring 2
Port1/1
VLAN 2
Port2/2
VLAN 2
S2
S1
S4
S3
Ring 3
Ring 1
Ring 2
S1
S2
1
1
1
1
1
1
1
1
T
T
2
2
2
2
2
2
2
2
1,2
1,2
Port1/1
Port2/2
C = customer port