H3C S3610-28P Operation Manual page 1482

Operation Manual – RRPP
H3C S3610&S5510 Series Ethernet Switches
primary ring and an assistant-edge node on the subring. This node is used in
conjunction with the edge node to detect the integrity of the primary ring and
perform loop guard.
As shown in
the master node of Ring 1, Device B, Device C and Device D are the transit nodes of
Ring 1; Device E is the master node of Ring 2, Device B is the edge node of Ring 2, and
Device C is the assistant edge node of Ring 2.
V. Primary port and secondary port
Each master node or transit node has two ports accessing an RRPP ring, in which one
serves as the primary port and the other serves as the secondary port. You can
determine the role of a port.
1) In terms of functionality, the difference between the primary port and the
secondary port of a master node is:
The primary port and the secondary port are designed to play the role of sending
and receiving loop-detect packets respectively.
When an RRPP ring is in health state, the secondary port of the master node will
logically deny data 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 permit data VLANs, that is, forward packets of data VLANs.
2) In terms of functionality, there is no difference between the primary port and the
secondary port of the transit node. Both are designed for the transfer of protocol
packets and data packets over an RRPP ring.
As shown in
primary port and the secondary port of the master node on Ring 1 respectively. Device
B, Device C and Device D are the transit nodes of Ring 1. Their port 1 and port 2 are the
primary port and the secondary port on Ring 1 respectively.
VI. Common port and edge port
Each edge node or assistant edge node have two ports accessing a subring, with one
being a common port and the other being an edge port. Common port is a port
accessing the primary ring and a subring simultaneously; and edge port is a port
accessing only a subring.
As shown in
port 2 and Device C's port 1 access the primary ring and a subring at the same time, so
they are common ports. Device B's port 3 and Device C's port 3 access only a subring,
so they are edge ports.
Figure 1-1, Ring 1 is the primary ring and Ring 2 is a subring. Device A is
Figure 1-1, Device A is the master node of Ring 1. Port 1 and port 2 are the
Figure 1-1, Device B and Device C lie on Ring 1 and Ring 1. Device B's
1-3
Chapter 1 RRPP Configuration