Brocade TurboIron 24X Series Configuration Guide - Manual (Page 318)

284 Brocade TurboIron 24X Series Configuration Guide
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Metro Ring Protocol (MRP)
FIGURE 12 Metro ring – from preforwarding to forwarding
Each RHP also has a sequence number. MRP can use the sequence number to determine the
round-trip time for RHPs in the ring. Refer to
“Using MRP diagnostics” on page 293.
RHP processing in MRP Phase 2
Figure 13 shows an example of how RHP packets are processed normally in MRP rings with shared
interfaces.
Customer A
Customer A
Customer A
Customer A
Switch B
Switch A
Switch C
Switch D
F
F
F
F
PF
PF
PF PF
PF F
F
B
Secondary port
receives RHP 1
and changes to
Blocking
Primary port then
sends RHP 2 with
forwarding bit on
Master
Node
Forwarding bit is on.
Each port changes from
Preforwarding to Forwarding
when it receives this RHP.
RHP 2