Operation Mannual – RRPPH3C S7500 Series Ethernet Switches Chapter 1 RRPP Configuration1-4VII. MAC address FDBThe Layer 2 forwarding database (FDB) on a switch is updated through the sourceMAC address auto-learning function of the switch.VIII. TimerTwo timers, Hello timer and Fail timer, are involved when the master node sends andreceives RRPP packets.z Hello timer: Defines the time interval at which the primary port of the master nodesends the health detection packet.z Fail timer: Defines the timeout time for the secondary port of the master node toreceive health detection packets. The value of Fail timer must be greater than orequal to three times the Hello timer value.1.1.2 RRPP Packet TypeThe following table describes RRPP packet types.Table 1-1 RRPP packetsPacket type DescriptionHEALTH (HELLO) The master node sends the health detection packet (HELLOpacket) to detect whether the ring network is complete.LINK-DOWN A transit node sends this packet to notify the master nodethat a link is DOWN and the physical ring is disconnected.COMMON-FLUSH-FDBThe master node sends this packet to tell all the transitnodes to refresh their respective MAC address FDBs.COMPLETE-FLUSH-FDBThe master node sends this packet to tell all the transitnodes to refresh their respective MAC address FDBs andunblock the ports in the blocked data VLANs.EDGE-HELLOThis packet is generated by the edge node of a subring andreceived by the assistant edge node in the same subring.The subring uses this packet to check the integrity of theprimary ring in the home domain.MAJOR-FAULTThis packet is generated by the assistant edge node of asubring. If the assistant edge node does not receive theEDGE-HELLO from the edge node within the specifiedperiod, it reports to the edge node that a fault exists in theprimary ring of the home domain.
