Ring Initialization - Dell PowerConnect B-RX Configuration Manual

14

Ring initialization

Ring initialization
The ring shown in
Figure 65
ring interfaces on the master node and member nodes begin in the Preforwarding state (PF).
FIGURE 65
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.
A ring interface can have one of the following MRP states:
•
390
Figure 63 shows the port states in a fully initialized ring without any broken links.
shows the initial state of the ring, when MRP is first enabled on the ring's switches. All
Metro ring – initial state
PF
F
Switch C
Customer A
PF
Preforwarding (PF) – The interface can forward RHPs but cannot forward data. All ring ports
being in this state when you enable MRP.
Customer A
F
PF PF
Switch B
All ports start in
Preforwarding state.
Primary port on Master
node sends RHP 1
Switch D
PF
PF
F
Customer A
PF
F
Master
Switch A
Node
Customer A
PF
BigIron RX Series Configuration Guide
53-1001810-01