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Araknis Networks AN-210/310-SW-F/R Manual
Product Manual
Table of Contents
STP – MST Settings
Multiple Spanning Tree Protocol (MSTP) is used to map multiple VLANs to one spanning tree topology. Since
there are rarely as many unique topologies as there are VLANs in a network, using MST saves switch CPU
power by reducing the number of spanning tree instances required to handle all VLANs on the device. Each
MST instance acts as its own RSTP node within the network’s CIST.
Instance Settings
Select which VLANs will be included in each MSTI.
Figure 20.
STP MST Instance Settings Menu
•
MST ID –
MST instance identifier.
•
VLAN List –
Enter the VLAN IDs to be associated with the topology. Enter individual or ranges of values,
for example: “20, 30-32” entered would associate VLANs 20, 30, 31, and 32.
•
Priority –
Value used to prioritize what MST ID is elected as the path back to the root bridge device. If
all switches are left to default priority, the root bridge with the lowest numbered MAC address will be
elected. Smaller values indicate higher priority; larger values, lower priority. Range: 0-61440 (multiples of
4096)
Default: 32768
•
Regional Root Bridge –
Displays the MAC address and priority for the regional root bridge.
•
Internal Root Cost –
Displays the cost to reach the regional root bridge inside the MSTP region. When
a BPDU is received on an internal port, this cost is adjusted based on the receiving boundary port cost.
This information is not shared or counted outside the region.
•
Designated Bridge –
Displays the MAC address and priority for the current designated bridge.
•
Root Port –
Switch port connecting the switch to that MST’s root bridge device.
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