H3C S5120-EI Series Configuration Manual

Also see for S5120-EI Series: Configuration guide Installation manual Configuration guide Configuration guide Operation manual

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H3C S5120-EI Series Configuration Manual Manual pdf 63 page image

54Primary port and secondary portEach master node or transit node has two ports connected to an RRPP ring, one serving as the primaryport and the other serving as the secondary port. You can determine the port’s role.1. In terms of functionality, the primary port and the secondary port of a master node have thefollowing differences:{ The primary port and the secondary port are designed to play the role of sending andreceiving loop-detect packets respectively.{ When an RRPP ring is in Health state, the secondary port of the master node will logically denydata VLANs and permit only the packets of the control VLANs.{ When an RRPP ring is in Disconnect state, the secondary port of the master node will permitdata VLANs (forward packets of data VLANs).2. In terms of functionality, the primary port and the secondary port of a transit node have nodifference. Both are designed for transferring protocol packets and data packets over an RRPPring.As shown in Figure 11, Device A is the master node of Ring 1. Port 1 and Port 2 are the primary port andthe secondary port of the master node on Ring 1 respectively. Device B, Device C, and Device D are thetransit nodes of Ring 1. Their Port 1 and Port 2 are the primary port and the secondary port on Ring 1respectively.Common port and edge portThe ports connecting the edge node and assistant-edge node to the primary ring are common ports. Theports connecting the edge node and assistant-edge node only to the subrings are edge ports.As shown in Figure 11, Device B and Device C lie on Ring 1 and Ring 2. Device B’s Port 1 and Port 2 andDevice C’s Port 1 and Port 2 access the primary ring, so they are common ports. Device B’s Port 3 andDevice C’s Port 3 access only the subring, so they are edge ports.RRPP ring groupTo reduce Edge-Hello traffic, you can configure a group of subrings on the edge node or assistant-edgenode. For more information about Edge-Hello packets, see "RRPPDUS." You must configure a device asthe edge node of these subrings, and another device as the assistant-edge node of these subrings.Additionally, the subrings of the edge node and assistant-edge node must connect to the same subringpacket tunnels in major ring (SRPTs) so that Edge-Hello packets of the edge node of these subrings travelto the assistant-edge node of these subrings over the same link.An RRPP ring group configured on the edge node is an edge node RRPP ring group, and an RRPP ringgroup configured on an assistant-edge node is an assistant-edge node RRPP ring group. Up to onesubring in an edge node RRPP ring group is allowed to send Edge-Hello packets.RRPPDUSTable 18 RRPPDU types and their functionsType DescriptionHello The master node initiates Hello packets to detect the integrity of a ring in anetwork.Link-DownThe transit node, the edge node, or the assistant-edge node initiates Link-Downpackets to notify the master node of the disappearance of a ring in case of a linkfailure.