Advantech EKI-9312P Series, User Manual

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M
ANAGEMENT
I
NTERFACE
CST Configuration/Status
The Spanning Tree CST Configuration/Status page allows users to configure bridge,
BPDU, and hold counts. To access this page, click
Switching > Spanning Tree > CST
Configuration/Status .
Figure 3-116. Switching > Spanning Tree > CST Configuration/Status
The following table describes the items in the previous menu.
Table 3-113. Switching > Spanning Tree > CST Configuration/Status
Parameter Description
Bridge Priority Enter the bridge priority for the Common and Internal Spanning tree (CST). The
value lies between 0 to 61440. It is set in multiples of 4096. For example if the pri-
ority is attempted to be set to any value between 0 and 4095, it will be set to 0. If it
is tried to be set to any value between 4096 and (2*4096-1) it will be set to 4096
and so on. The default priority is 32768.
Bridge Max Age Enter the bridge max age in seconds for the Common and Internal Spanning tree
(secs) (CST). The value lies between 6 to 40, with the value being less than or equal to "2
* (Bridge Forward Delay -1)" and greater than or equal to "2 * (Bridge Hello Time
+1)". The default value is 20.
Bridge Hello Time Displays the bridge hello time in seconds for the Common and Internal Spanning
(secs) tree (CST). According to IEEE 802.1Q-REV 2005 updating hello time is disallowed.
Bridge Forward Enter the time spent in "Listening and Learning" mode before forwarding packets.
Delay (secs) Bridge Forward Delay must be greater or equal to "(Bridge Max Age / 2) + 1". The
time range is from 4 to 30 seconds. The default value is 15.
Spanning Tree Maxi- Enter the maximum number of hops for the Spanning tree. The valid range is 6 to
mum Hops 40. Default value is 20.
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