Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 527)

Multi-Service IronWare Switching Configuration Guide 497
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MRP Phase 2
14
Normal flow
Figure 121 and Figure 122 show how RHP packets are forwarded in rings with shared interfaces.
Figure 121 shows the flow of ring 1 RHPs while Figure 122 shows how ring 2 RHPs flow.
Interface e 2/1 is the primary interface of the ring 1 master node. The primary interface forwards
an RHP packet on the ring. Since all the interfaces on ring 1 are regular interfaces, the RHP packet
is forwarded until it reaches interface e 2/2, the secondary interface of the ring 1 master. Receipt
of this RHP indicates a healthy ring 1 and interface e2/2 then changes to or maintains its state of
blocking.
No copies of the ring 1 RHPs are forwarded on ring 2 tunnel interfaces or ring 2 regular interfaces
in accordance with the rule that a higher priority RHP is not permitted to traverse a lower priority
ring interface.
FIGURE 121 RHP flow on rings with shared interfaces showing ring 1 RHP flow