Rrpp Packets - H3C S7500E Series Operation Manual

Operation Manual – RRPP
H3C S7500E Series Ethernet Switches
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.
Note:
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
value.

1.1.2 RRPP Packets

Table 1-1
Table 1-1 RRPP packet types and their functions
Health
Link-Down
Common-Flush-FDB
Complete-Flush-FDB
Edge-Hello
Major-Fault
shows the types of RRPP packets and their functions.
Type
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 state.
The master node initiates Complete-Flush-FDB packets to
notify the transit nodes to update their own MAC entries
and ARP entries, and release from blocking ports
temporarily when an RRPP ring transits into health state.
The edge node initiates Edge-Hello packets to examine
the links of the primary ring between the edge node and
the assistant edge node.
Assistant edge node initiates Major-Fault packets to notify
the edge node of a failure when a link of primary ring
between edge node and assistant edge node is torn down.
Description
1-4
Chapter 1 RRPP Configuration