H3C Technologies H3C S10500 Series Switches - Manual (Page 75)

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To do… Use the command… Remarks
Configure the Fast-Fail timer timer fast-fail-timer fast-fail-value
Optional
By default, the Fast-Fail timer is
600 milliseconds.
Configure the Fast-Hello timer
timer fast-hello-timer
fast-hello-value
Optional
By default, the Fast-Hello timer is
200 milliseconds.
NOTE:
•
The value of the Fast-Fail timer must be equal to or greater than three times the Fast-Hello timer.
• In a dual-homed-ring network, to avoid temporary loops when the primary ring fails, ensure that the
Fast-Fail timer value is equal to or greater than six times the timer resolution, and the difference between
the Fast-Fail timer value on the master node of the subring and that on the master node of the primary
ring is greater than twice the Fast-Hello timer value of the master node of the subring.
Configuring an RRPP ring group
To reduce Edge-Hello traffic, adopt the RRPP ring group mechanism by assigning subrings with the same
edge node/assistant-edge node to an RRPP ring group. An RRPP ring group must be configured on both
the edge node and the assistant-edge node and can only be configured on these two types of nodes.
Perform this configuration on both the edge node and the assistant-edge node in an RRPP domain.
Follow these steps to configure an RRPP ring group:
To do… Use the command… Remarks
Enter system view system-view —
Create an RRPP ring group and
enter RRPP ring group view
rrpp ring-group ring-group-id Required
Assign the specified subrings to the
RRPP ring group
domain domain-id ring ring-id-list Required
NOTE:
•
You can assign a subring to only one RRPP ring group. Make sure that the RRPP ring group configured
on the edge node and the RRPP ring group configured on the assistant-edge node contain the same
subrings. Otherwise, the RRPP ring group cannot operate properly.
• Ensure that the subrings in an RRPP ring group share the same edge node and assistant-edge node and
that the edge node and the assistant edge node have the same SRPTs.
• Ensure that a device plays the same role on the subrings in an RRPP ring group. The role can be the edge
node or the assistant-edge node.
• Ensure that the RRPP ring group on the edge node and the RRPP ring group on the assistant-edge node
have the same configurations and activation status.
• Ensure that all subrings in an RRPP ring group have the same SRPTs. If the SRPTs of these subrings are
configured or modified differently, the RRPP ring group cannot operate properly.