EKI-9500 Series User Manual
222
4.4.19.2
MST
Use the Spanning Tree MST Summary page to view and configure the Multiple Span-
ning Tree Instances (MSTIs) on the device. Multiple Spanning Tree Protocol (MSTP)
allows the creation of MSTIs based upon a VLAN or groups of VLANs. Configuring
MSTIs creates an active topology with a better distribution of network traffic and an
increase in available bandwidth when compared to classic STP.
To access this page, click
Switching
>
Spanning Tree
>
MST
.
Figure 4.247 Switching > Spanning Tree > MST
The following table describes the items in the previous figure.
4.4.19.3
MST Port
Use the Spanning Tree MST Port Summary page to view and configure the Multiple
Spanning Tree (MST) settings for each interface on the device.
Refresh
Click
Refresh
to update the screen.
Cancel
Click
Cancel
to restore default value.
Item
Description
Item
Description
MST ID
The number that identifies the MST instance.
Priority
The bridge priority for the spanning-tree instance. This value affects
the likelihood that the bridge is selected as the root bridge. A lower
value increases the probability that the bridge is selected as the root
bridge.
# of Associated
VLANs
The number of VLANs that are mapped to the MSTI. This number does
not contain any information about the VLAN IDs that are mapped to the
instance.
Bridge Identifier
A unique value that is automatically generated based on the bridge pri-
ority value of the MSTI and the base MAC address of the bridge. When
electing the root bridge for an MST instance, if the bridge priorities for
multiple bridges are equal, the bridge with the lowest MAC address is
elected as the root bridge.
Time Since Topology
Change
The amount of time that has passed since the topology of the MSTI
has changed.
Designated Root
The bridge identifier of the root bridge for the MST instance. The iden-
tifier is made up of the bridge priority and the base MAC address.
Root Path Cost
The path cost to the designated root for this MST instance. Traffic from
a connected device to the root bridge takes the least-cost path to the
bridge. If the value is 0, the cost is automatically calculated based on
port speed.
Root Port
The port on the bridge with the least-cost path to the designated root
for the MST instance.
Refresh
Click
Refresh
to update the screen.
Remove
Click
Remove
to remove the selected entries.
