Configuration Guide User guide

FastIron Configuration Guide 623
53-1002494-02
Metro Ring Protocol
FIGURE 48 Flow of RHP packets when a link for shared interfaces breaks
RHP packets follow this flow until the link is restored; then the RHP packet returns to it normal flow
as shown in Figure 46.
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 49 shows an example.
FIGURE 49 Metro ring – ring VLAN and customer VLANs
X
Ring 1
Ring 2
S3
S4
S1
S2
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
1,2
1,2
Master node
P ort2/2 changes
to preforwarding
(primary interface)
P ort2/1
Master node
Port3/2
P
ort3/1 (primary interface)
= Ring 2 RHP packet
T
T