1-16z The Fail timer value must be equal to or greater than three times the Hello timer value.z To avoid temporary loops when the primary ring fails in a dual-homed-ring network, ensure that thedifference between the Fail timer value on the master node of the subring and that on the masternode of the primary ring is greater than twice the Hello timer value of the master node of thesubring.Configuring an RRPP Ring GroupTo reduce Edge-Hello traffic, you can adopt the RRPP ring group mechanism, that is, assign subringswith the same edge node/assistant-edge node to an RRPP ring group. An RRPP ring group must beconfigured on both the edge node and the assistant-edge node, and can only be configured on thesetwo types of nodes.Perform this configuration on both the edge node and the assistant-edge node in an RRPP domain.Follow these steps to configure an RRPP ring group:To do… Use the command… RemarksEnter system view system-view —Create an RRPP ring groupand enter RRPP ring groupviewrrpp ring-group ring-group-id RequiredAssign the specified subrings tothe RRPP ring groupdomain domain-id ringring-id-list Requiredz You can assign a subring to only one RRPP ring group. Make sure that the RRPP ring groupconfigured on the edge node and that configured on the assistant-edge node must contain thesame subrings. Otherwise, the RRPP ring group cannot operate normally.z Ensure that the subrings in an RRPP ring group share the same edge node and assistant-edgenode, and the edge node and the assistant edge node have the same SRPTs.z Ensure that a device plays the same role on the subrings in an RRPP ring group. The role can bethe edge node or the assistant-edge node.z Ensure that the RRPP ring group on the edge node and that on the assistant-edge node have thesame configurations and activation status.z Ensure that all subrings in an RRPP ring group have the same SRPTs. If the SRPTs of thesesubrings are configured or modified differently, the RRPP ring group cannot operate normally.
