How Ring Breaks Are Detected And Healed - Dell PowerConnect B-FCXs Configuration Manual

10
Metro Ring Protocol (MRP)

How ring breaks are detected and healed

Figure 65
preserves connectivity among the customer networks.
FIGURE 65
F
Customer A
If a break in the ring occurs, MRP heals the ring by changing the states of some of the ring
interfaces:
•
346
shows ring interface states following a link break. MRP quickly heals the ring and
Metro ring – ring break
Customer A
F
Switch C
Customer A
Blocking interface – The Blocking interface on the Master node has a dead timer. If the dead
time expires before the interface receives one of its ring RHPs, the interface changes state to
Preforwarding. Once the secondary interface changes state to Preforwarding:
F
F F
Switch B
Switch D
F
F
F
Switch A
F
Master
Node
F
PowerConnect B-Series FCX Configuration Guide
Customer A
53-1002266-01