D-Link DGS-1510 User Manual - Page 150

MST Configuration Identification, Guard Root, Link Type, Shared, Port Fast, Network, Disabled

Page 150 highlights

DGS-1510 Series Gigabit Ethernet SmartPro Switch Web UI Reference Guide Parameter Guard Root Link Type Port Fast TCN Filter BPDU Forward Priority Hello Time Description Select to enable or disable the guard root function. Select the link type option here. Options to choose from are Auto, P2P, and Shared. A full-duplex port is considered to have a pointto-point (P2P) connection. On the opposite, a half-duplex port is considered to have a Shared connection. The port cannot transit into the forwarding state rapidly by setting the link type to Shared. By default, this option is Auto. Select the port fast option here. Options to choose from are: • Network - The port remains in the non-port-fast state for three seconds. The port will change to the port-fast state if no BPDU is received and changes to the forwarding state. If the port received the BPDU later, it will change to the nonport-fast state. This is the default option. • Disabled - The port is always in the non-port-fast state. It will always wait for the forward-time delay to change to the forwarding state. • Edge - The port directly changes to the spanning-tree forwarding state when a link-up occurs without waiting for the forward-time delay. If the interface receives a BPDU later, its operation state changes to the non-port-fast state. Select to enable or disable the TCN filter option. Enabling TC filtering on a port is useful for an ISP to prevent the external bridge to a core region of the network, causing address flushing in that region, possibly, because those bridges are not under the full control of the administrator. When a port is set to the TCN filter mode, the TC event received by the port will be ignored. By default, this option is Disabled. Select to enable or disable BPDU forwarding. If enabled, the received STP BPDU will be forwarded to all VLAN member ports in the untagged form. By default, this option is Disabled. Select the priority value here. Options to choose from are 0 to 240. By default, this option is 128. A lower value has higher priority. Enter the hello time value here. This value must be between 1 and 2 seconds. This value specifies the interval that a designated port will wait between the periodic transmissions of each configuration message. Click the Apply button to accept the changes made. MST Configuration Identification This window is used to view and configure the MST configuration identification settings. These settings will uniquely identify a multiple spanning tree instance set on the Switch. The Switch initially 139

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DGS-1510 Series Gigabit Ethernet SmartPro Switch Web UI Reference Guide
139
Parameter
Description
Guard Root
Select to enable or disable the guard root function.
Link Type
Select the link type option here. Options to choose from are
Auto
,
P2P
, and
Shared
. A full-duplex port is considered to have a point-
to-point (
P2P
) connection. On the opposite, a half-duplex port is
considered to have a
Shared
connection. The port cannot transit
into the forwarding state rapidly by setting the link type to
Shared
.
By default, this option is
Auto
.
Port Fast
Select the port fast option here. Options to choose from are:
Network
- The port remains in the non-port-fast state for
three seconds. The port will change to the port-fast state if
no BPDU is received and changes to the forwarding state. If
the port received the BPDU later, it will change to the non-
port-fast state. This is the default option.
Disabled
- The port is always in the non-port-fast state. It will
always wait for the forward-time delay to change to the
forwarding state.
Edge
- The port directly changes to the spanning-tree
forwarding state when a link-up occurs without waiting for the
forward-time delay. If the interface receives a BPDU later, its
operation state changes to the non-port-fast state.
TCN Filter
Select to enable or disable the TCN filter option. Enabling TC
filtering on a port is useful for an ISP to prevent the external bridge
to a core region of the network, causing address flushing in that
region, possibly, because those bridges are not under the full
control of the administrator. When a port is set to the TCN filter
mode, the TC event received by the port will be ignored. By default,
this option is
Disabled
.
BPDU Forward
Select to enable or disable BPDU forwarding. If enabled, the
received STP BPDU will be forwarded to all VLAN member ports in
the untagged form. By default, this option is
Disabled
.
Priority
Select the priority value here. Options to choose from are
0
to
240
.
By default, this option is
128
. A lower value has higher priority.
Hello Time
Enter the hello time value here. This value must be between 1 and
2 seconds. This value specifies the interval that a designated port
will wait between the periodic transmissions of each configuration
message.
Click the
Apply
button to accept the changes made.
MST Configuration Identification
This window is used to view and configure the MST configuration identification settings. These
settings will uniquely identify a multiple spanning tree instance set on the Switch. The Switch initially