
8-Port Gigabit (PoE+) Ethernet Smart Managed Pro Switch with (2 SFP or 2 Copper Ports and)
Cloud
Management
Configure Switching
User Manual
182
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 (secs)
. The bridge hello time for the Common and Internal
Spanning Tree (CST), which indicates the time in seconds a root bridge must wait
between configuration messages. The value is fixed at 2 seconds. The value must be
less than or equal to (Bridge Max Age / 2) – 1. The default hello time value is
2.
•
Bridge Forward Delay (secs)
. The bridge forward delay time, which indicates the
time in seconds a bridge must remains in a listening and learning state before
forwarding packets. The value must be greater or equal to (Bridge Max Age / 2) + 1.
The time range is from 4 seconds to 30 seconds. The default value is 15
seconds.
•
Spanning Tree Maximum Hops
. The maximum number of bridge hops the
information for a particular CST instance can travel before being discarded. The
range is from 6 to 40. The default is 20 hops.
8.
Click the
Apply
button.
Your settings are saved.
The following table describes the MSTP Status information that is displayed.
Table 34. STP advanced CST configuration, MSTP status
Field
Description
MST ID
The MST instances (including the CST) and the corresponding VLAN IDs associated with each
of them.
VID ID
The VLAN IDs (VIDs) and the corresponding filtering IDs (FIDs) associated with each of them.
FID ID
The FIDs and the corresponding VLAN IDs associated with each of them.
Configure the CST port settings
You can configure a common spanning tree (CST) and internal spanning tree on a specific
port on the switch.
A port can become diagnostically disabled (D-Disable) if a severe DOT1S error condition
occurs. The most common cause is that BPDU flooding occurs for DOT1S, for example, if
DOT1S receives more than 15 BPDUs during 3 seconds. Other causes for DOT1S D-Disable
are rare.
To configure the CST port settings:
1.
Connect your computer to the same network as the switch.
You can use a WiFi or wired connection to connect your computer to the network, or
connect directly to a switch that is off-network using an Ethernet cable.
2.
Launch a web browser.
3.
In the address field of your web browser, enter the IP address of the switch.