H3C Technologies H3C S7500E Series Switches - Manual (Page 76)

7-5
Type Description
Edge-Hello
The edge node initiates Edge-Hello packets to examine the SRPTs
between the edge node and the assistant-edge node.
Fast-Edge-Hello
The edge node initiates Fast-Edge-Hello packets to fast examine the
SRPTs between it and the assistant-edge node.
Major-Fault
The assistant-edge node initiates Major-Fault packets to notify the edge
node of SRPT failure when an SRPT between edge node and
assistant-edge node is torn down.
RRPPDUs of subrings are transmitted as data packets in the primary ring, while RRPPDUs of
the primary ring can only be transmitted within the primary ring.
RRPP Timers
When RRPP checks the link state of an Ethernet ring, the master node sends Hello packets out
the primary port according to the Hello timer and determines whether its secondary port
receives the Hello packets based on the Fail timer.
z The Hello timer specifies the interval at which the master node sends Hello packets out the
primary port.
z The Fail timer specifies the maximum delay between the master node sending Hello
packets out the primary port and the secondary port receiving the Hello packets from the
primary port. If the secondary port receives the Hello packets sent by the local master node
before the Fail timer expires, the overall ring is in Health state. Otherwise, the ring transits
into Disconnect state.
z The Fast-Hello timer specifies the interval at which the master node sends Fast-Hello
packets out the primary port.
z The Fast-Fail timer specifies the maximum delay between the master node sending
Fast-Hello packets out the primary port and the secondary port receiving the Fast-Hello
packets from the primary port. If the secondary port receives the Fast-Hello packets sent by
the local master node before the Fast-Fail timer expires, the entire ring is in Health state.
Otherwise, the ring transits into Disconnect state.