Rockwell-automation Ethernet Design Considerations Reference Manual Manual de usuario descargar pdf (Pagina 51)

Rockwell Automation Publication ENET-RM002C-EN-P - May 2013 51

Ethernet Infrastructure Features Chapter 3

Resilient Ethernet Protocol (REP)

REP operates on chain of bridges called segments. A port is assigned to a unique

segment. A segment can have up to two ports on a given bridge. REP is built in to

Stratix 8000 and Stratix 8300 switches.

REP supports closed and open rings in various topologies:

• Redundant networks can be built with REP segments

• Only ring resiliency protocol applicable to both Industrial and IT

applications

• Ring recovery time is less than 70 ms for both unicast and multicast traffic

in fiber implementations

REP is a segment concept. A segment is a chain of bridges.

When all links are operational, a unique port blocks the traffic on the segment. If

any failure occurs within the segment, the blocked port goes forwarding.

REP Segment

Interface f2

rep segment 10

Interface f1

rep segment 10

Interface f1

rep segment 10

Interface f2

rep segment 10

g1/1 g1/2 g1/1 g1/1 g1/1 g1/1g1/2 g1/2 g1/2 g1/2

REP Segment

Interface g1/2

REP segment 10

Interface g1/1

REP segment 10

Interface g1/2

REP segment 10

Interface g1/1

REP segment 10

Edge Port

g1/2 Block Traffic

Edge Port

g1/2 Unblock

Link Failure

g1/1 g1/1 g1/1 g1/1 g1/1

g1/2 g1/2 g1/2 g1/2 g1/2

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 105 106

Sin comentarios

Rockwell-automation Ethernet Design Considerations Reference Manual Manual de usuario Pagina 51