Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.6 - Page 457

Ethernet Ring Protection does not support Non-Stop Forwarding. A stack failover is destructive to the ring, even when configured on stack units that are not rebooted during the stack failover. Fault detection depends on the configured CCM transmission period. Fault detection may occur in milliseconds depending on the value of the CCM transmission period. Ethernet Ring Protection does not operate in a stack configuration. Do not configure Ethernet Ring Protection in a stack. Stack failover is not compatible with Ethernet Ring Protection. The N3200 Series switches do not support hardware-based Connectivity Fault Management. The lowest configurable value for the Continuity Check Message interval is one thousand milliseconds. Therefore ERP failover on the N3200 platform is on the order of multiple seconds. Example console (config)# ethernet ring g8032 profile profile1 console (config-erp-profile1)# Command History Command introduced in firmware release 6.6.1. timer This command configures the timer expiry values for an Ethernet ring profile. Use the no form of the command to reset the timers to the defaults. Syntax timer {guard milliseconds | hold-off milliseconds | wtr minutes} no timer {guard | hold-off | wtr } • guard timer-The guard timer is used to prevent ring nodes from acting upon outdated R-APS messages and prevents the possibility of forming a closed loop. Range: 10ms to 2000 ms in steps of 10ms. • hold-off timer-When a new defect or more severe defect occurs, this event will not be reported immediately to protection switching if the provisioned hold-off timer value is non-zero. Instead, the hold-off timer will be started. When the hold-off timer expires, it will be checked whether Layer 2 Switching Commands 457