Dell PowerConnect B-FCXs Configuration Manual page 384

10
Metro Ring Protocol (MRP)
FIGURE 62
Customer A
MRP uses Ring Health Packets (RHPs) to monitor the health of the ring. An RHP is an MRP protocol
packet. The source address is the MAC address of the master node and the destination MAC
address is a protocol address for MRP. The Master node generates RHPs and sends them on the
ring. The state of a ring port depends on the RHPs.
RHP processing in MRP Phase 1
A ring interface can have one of the following MRP states:
•
342
Metro ring – initial state
Customer A
PF
F
Switch C
PF
Preforwarding (PF) – The interface can forward RHPS but cannot forward data. All ring ports
begin in this state when you enable MRP.
F
PF PF
Switch B
All ports start in
Preforwarding state.
Primary port on Master
node sends RHP 1
PF Switch D
PF
F
Customer A
PF
F
Switch A
Master
Node
PF
PowerConnect B-Series FCX Configuration Guide
Customer A
53-1002266-01