SICOM Series CLI Command Manual
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The parameter <0x00-0xFFFF>: the value of bridge priority. It’s range is 0x00 to 0xFFFF,
the pace is 0x1000, default value is 0x8000.
The device’s bridge priority and MAC address compose the bridge ID. RSTP determines
current root bridge and root port by bridge ID. The less the value of priority is, the more
priority the bridge will have. The device with the smallest bridge ID will be regarded as
the root bridge.
In the network, the device will be forced to be the root by setting its priority value to be
the smallest.
Setting bridge forward delay
KYLAND(config)#rstp forward-delay <4-30>
The parameter <4-30>: forward delay (seconds). The default value is 15 seconds.
Forward delay is the status transition time for Discarding -> Learning -> Forwarding. It
is set by ROOT and it is unified in the whole network. This delay time also includes MAC
address table’s Short Ageing Time.
Setting bridge hello time
KYLAND(config)#rstp hello-time <1-2>
The parameter of <1-2> is the hello time (seconds). The default value is 2. Hello time is
the interval of sending BPDU periodically. It is set by ROOT and it is unified in the whole
network.
Setting bridge max age
KYLAND(config)#rstp rstp max-age <6-40>
The parameter <6-40>: message max age (seconds). The default value is 20.
Max age determines the times one setting message being transmitted in the network.
Each setting message will contain a Configuration Message Age. The setting message is
generated in the ROOT. In the BPDU sent by ROOT, the message max age will always be 0.
While the message passes one switch, the age will be added by 1. While the message age
is bigger than maximum age, the message will be discarded. Max age limits the times a
switch joins the RSTP calculation. The devices with a hop count bigger than the max age
will not be calculated in the present spanning tree.
Setting protocol version
KYLAND(config)#rstp rstp forceversion <0-2>
The parameter <0-2>: current protocol version, 0 for STP, 2 for RSTP, 1 is not valid.
