Rrpp Packets - H3C S5500-EI series Operation Manual

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Operation Manual – RRPP

H3C S5500-EI Series Ethernet Switches

VII. Multi-domain intersection common port

Of the two ports on a node where rings of different domains intersect, the common port

is the one on the primary ring that belongs to different domains at the same time. This

port must not be on a subring. The role of the port is determined by user configuration.

VIII. Timers

The master node uses two timers to send and receive RRPP packets: the Hello timer

and the Fail timer.

The Hello timer is used for the primary port to send Health packets.

The Fail timer is used for the secondary port to receive Health packets from the

master node.

If the secondary port receives the Health packets before the Fail timer expires, the

overall ring is in health state. Otherwise, the ring transits into disconnect state until the

secondary port receives the Health packet again.

In an RRPP domain, a transit node learns the Hello timer value and the Fail timer

value on the master node through the received Health packets, guaranteeing the

consistency of two timer values across a ring.

The Fail timer value must be greater than or equal to 3 times of the Hello timer

1.1.2 RRPP Packets

Table 1-1 RRPP packet types and their functions

Common-Flush-FDB

shows the types of RRPP packets and their functions.

The master node initiates Health packets to detect the

integrity of a ring in a network.

The transit node, the edge node or the assistant edge node

initiates Link-Down packets to notify the master node the

disappearance of a ring in case of a link failure.

The master node initiates Common-Flush-FDB packets to

notify the transit nodes to update their own MAC entries and

ARP entries when an RRPP ring transits to disconnect

Chapter 1 RRPP Configuration

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