Cisco Content Hub - ITU-T G.8032 Ethernet Ring Protection Switching
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How Ethernet Ring Protection Switching (ERPS) Boosts Your Network - Westward Sales
Cisco ME 3800x and ME 3600x Switches Software Configuration Guide, Cisco IOS Release 15.5(1)S - Configuring Ethernet Ring Protection [Cisco ME 3600X Series Ethernet Access Switches] - Cisco
FIBERROAD G.8032 Ethernet Ring Protection Switch User Guide