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MRP Phase 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .477<br />

Ring interface ownership. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .479<br />

Ring interface IDs and types . . . . . . . . . . . . . . . . . . . . . . . . . . .480<br />

Selection of the master node for a ring . . . . . . . . . . . . . . . . . .481<br />

RHP processing in rings with shared interfaces . . . . . . . . . . .483<br />

How ring breaks are detected and healed between<br />

shared interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .484<br />

Normal flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .485<br />

Flow when a link breaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .487<br />

Configuring MRP with shared interfaces . . . . . . . . . . . . . . . . .488<br />

Tuning MRP timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .488<br />

Flushing the mac table following an MRP event . . . . . . . . . . .488<br />

Hello time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489<br />

Preforwarding time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .489<br />

Setting hello and preforwarding timers appropriately. . . . . . .489<br />

Effect of the scale timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .490<br />

Using MRP diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .491<br />

Enabling MRP diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . .491<br />

Displaying MRP diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . .492<br />

Displaying MRP information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .492<br />

Displaying topology group information . . . . . . . . . . . . . . . . . . .492<br />

Displaying ring information . . . . . . . . . . . . . . . . . . . . . . . . . . . .493<br />

MRP CLI example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .495<br />

Commands on Switch A (master node) . . . . . . . . . . . . . . . . . .495<br />

Commands on Switch B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .496<br />

Commands on Switch C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .497<br />

Commands on Switch D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .497<br />

Configuring MRP under an ESI VLAN. . . . . . . . . . . . . . . . . . . . . . . .497<br />

Chapter 15<br />

Ethernet Ring Protection Protocol<br />

Ethernet Ring Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .499<br />

Ethernet Ring Protection components . . . . . . . . . . . . . . . . . . .500<br />

Initializing a new ERN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .504<br />

Signal fail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .508<br />

Manual switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .509<br />

Forced switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .512<br />

Double Forced Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515<br />

Dual-end blocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515<br />

Non-revertive mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515<br />

Interconnected rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .515<br />

FBD flush optimization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517<br />

Configuring ERP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517<br />

Sample configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 517<br />

Configuring ERP with IEEE 802.1ag. . . . . . . . . . . . . . . . . . . . . . . . .518<br />

xiv<br />

Multi-Service IronWare Switching Configuration Guide<br />

53-1002820-02

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