3Com S7906E - Switch, Configuration Manual

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To do… Use the command… Remarks
Configure the Hello timer and
Fail timer for the RRPP domain
timer hello-timer hello-value
fail-timer fail-value
Required
By default, the Hello timer value
is 1 second and the Fail timer
value is 3 seconds.
z
The Fail timer value must be equal to or greater than three times the Hello timer value.
z
To avoid temporary loops when the primary ring fails in a dual-homed-ring network, ensure that the
difference between the 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 Hello timer value of the master node of the
subring.
Configuring RRPP Fast Detection
The S7900E series Ethernet switches support RRPP fast detection only after SD or EB cards are
mounted in them.
Enabling Fast Detection
Perform this configuration on the master node, edge node, and assistant-edge node in the RRPP
domain to be configured.
Follow these steps to enable fast detection:
To do… Use the command… Remarks
Enter system view system-view —
Enter RRPP domain view rrpp domain domain-id —
Enable fast detection fast-detection enable
Required
Disabled by default
To configure fast detection on the master node of a subring, make sure that the edge node and
assistant-edge node of the subring supports fast detection. Otherwise, you are not recommended to
configure fast detection on the master node of the subring.