H3C S5820X SERIES High Availability Configuration Manual

Also see for s5800 series: Installation manual Instruction manual Command reference Quick start Troubleshooting guide

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H3C S5820X SERIES High Availability Configuration Manual Manual pdf 82 page image

70CAUTION:• 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, ensure 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.Perform this configuration on the master node of an RRPP domain.Follow these steps to configure RRPP timers:To do… Use the command… RemarksEnter system view system-view —Enter RRPP domain view rrpp domain domain-id —Configure the Hello timer and Failtimer for the RRPP domaintimer hello-timer hello-valuefail-timer fail-valueRequiredBy default, the Hello timer value is1 second and the Fail timer value is3 seconds.Configuring RRPP fast detectionEnabling fast detectionPerform this configuration on the master node, edge node, and assistant-edge node in the RRPP domainto be configured.Follow these steps to enable fast detection:To do… Use the command… RemarksEnter system view system-view —Enter RRPP domain view rrpp domain domain-id —Enable fast detection fast-detection enable RequiredDisabled by defaultCAUTION:• To configure fast detection on the master node of a subring, make sure that the edge node andassistant-edge node of the subring supports fast detection. Otherwise, H3C does not recommendconfiguring fast detection on the master node of the subring.• When configuring fast detection in an RRPP domain, enable fast detection first on the edge node, andthen on the assistant-edge node. Otherwise, the assistant-edge node may fail to receive Fast-Edge-Hellopackets and erroneously conclude that the master node is faulty.Configuring fast detection timersPerform this configuration on the master node in the RRPP domain to be configured.Follow these steps to configure RRPP fast detection timers: