Quick Reference Guide

204 PowerConnect B-Series TI24X Configuration Guide
53-1002269-02
Metro Ring Protocol (MRP)
8
FIGURE 38 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 213.
RHP processing in MRP Phase 2
Figure 39 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