66To prevent Hello packets of subrings from being looped on the primary ring, enable the primary ring onits master node before enabling the subrings on their separate master nodes. On an edge node orassistant-edge node, enable/disable the primary ring and subrings separately:• Enable the primary ring of an RRPP domain before enabling the subrings of the RRPP domain.• Disable the primary ring of an RRPP domain after disabling all subrings of the RRPP domain.Perform this operation on all nodes in the RRPP domain.To activate an RRPP domain:Step Command Remarks1. Enter system view. system-view N/A2. Enable RRPP. rrpp enable Disabled by default.3. Enter RRPP domain view. rrpp domain domain-id N/A4. Enable the specified RRPPring. ring ring-id enable Disabled by default.Configuring RRPP timersPerform this configuration on the master node of an RRPP domain.To configure RRPP timers:Step Command Remarks1. Enter system view. system-view N/A2. Enter RRPP domain view. rrpp domain domain-id N/A3. Configure the Hello timer andFail timer for the RRPPdomain.timer hello-timer hello-valuefail-timer fail-valueBy default, the Hello timer value is1 second, and the Fail timer valueis 3 seconds.NOTE:• The Fail timer value must be equal to or greater than three times the Hello timer value.• To avoid temporary loops when the primary ring fails in a dual-homed-ring network, make sure that thedifference between the Fail timer value on the master node of the subring and that on the master nodeof the primary ring is greater than twice the Hello timer value of the master node of the subring.Configuring an RRPP ring groupTo reduce Edge-Hello traffic, adopt the RRPP ring group mechanism by assigning subrings with the sameedge node/assistant-edge node to an RRPP ring group. An RRPP ring group must be configured on boththe edge node and the assistant-edge node and can only be configured on these two types of nodes.Perform this configuration on both the edge node and the assistant-edge node in an RRPP domain.
