DGS-3700-12/DGS-3700-12G Series Layer 2 Gigabit Ethernet Switch User Manual
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Max Hops (1-20) Used to set the number of hops between devices in a spanning tree region before the
BPDU (bridge protocol data unit) packet sent by the Switch w ill be discarded. Each
switch on the hop count will reduce the hop count by one until th e value reaches zero.
The Switch will then discard the BPDU packet and the information held for the port will
age out. The user may set a hop count from 1 to 20. The default is 20.
NNI BPDU Address Configure NNI port address.
dot1d – Specifies GVRP’s bpdu MAC address of NNI port using the definition of 802.1d.
dot1ad – Specifies GVRP’s pdu MAC address of NNI port using the definition of
802.1ad.
Click Apply to implement changes made.
NOTE: The Hello Time cannot be longer than the Max. Age. Other wise, a
configuration error will occur. Observe the following form ulas when sett ing
the above parameters:
Max. Age ≤ 2 x (Forward Delay - 1 second)
Max. Age ≥ 2 x (Hello Time + 1 second)