Metro Ring Protocol (Mrp) Phase 1 And 2; Metro Ring Protocol (Mrp) Phase 1 - Dell PowerConnect B-RX Configuration Manual

Metro Ring Protocol (MRP) Phase 1 and 2

Metro Ring Protocol (MRP) phase 1

MRP Phase 1 is a Brocade proprietary protocol that prevents Layer 2 loops and provides fast
reconvergence in Layer 2 ring topologies. It is an alternative to STP and is especially useful in
Metropolitan Area Networks (MANs) where using STP has the following drawbacks:
•
•
Figure 63
FIGURE 63
BigIron RX Series Configuration Guide
53-1002253-01
STP allows a maximum of seven nodes. Metro rings can easily contain more nodes than this.
STP has a slow reconvergence time, taking many seconds or even minutes. MRP can detect
and heal a break in the ring in sub-second time.
shows an MRP metro ring.
Metro ring – normal state
F
F
Member
Node
Customer A
F
Customer A
F
Member
F F
Node
Switch B
Switch C
This interface blocks
Layer 2 traffic
to prevent a loop
Switch D
Member
Node
F F
F
Customer A
F
Master
F
Switch A
Node
Customer A
B
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