4 Configuration
D-Link DXS-1210 Series User Manual
4
4
1
1
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. The options to choose from are
Network
,
Disabled
, and
Edge
. In the
Network
mode the port will remain 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. In the
Disable
mode, the port will always be in the non-port-fast
state. It will always wait for the forward-time delay to change to the forwarding state. In the
Edge
mode, the
port will directly change 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. By default, this option is
Network
.
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:
Bridges use Bridge Protocol Data Units (BPDU) to provide spanning tree information. STP
BPDUs filtering is useful when a bridge interconnects two regions; each region needing a separate spanning
tree. BPDU filtering functions only when STP is disabled either globally or on a single interface. The possible
field values are:
Disabled –
BPDU filtering is enabled on the port.
Enabled –
BPDU forwarding is enabled on the port (if STP is disabled).
Priority:
Select the priority of each port. Selectable range is from 0 to 240, and the default setting is 128.
The lower the number, the greater the probability the port will be chosen as a root port.
Hello Time:
The interval between two transmissions of BPDU packets sent by the Root Bridge to indicate to
all other switches that it is indeed the Root Bridge. The default value is 2.
Click
Apply
button to save your settings.
L2 Features > STP > MST Configuration Identification
Multiple Spanning Tree (MSTP) provides various load balancing scenarios by allowing multiple VLANs to be
mapped to a single spanning tree instance, providing multiple pathways across the network. For example,
while port A is blocked in one STP instance, the same port can be placed in the Forwarding state in another
STP instance.
The MST Configuration Identification page is for defining global MSTP settings, including region names,
MSTP revision level.
Figure 4.69 – L2 Features > STP > MST Configuration Identification
MST Configuration Identification:
Configuration Name:
Enter a name set on the switch to uniquely identify the MSTI (multiple spanning tree
instance). If a configuration name is not set, this field shows the MAC address of the device running MSTP.
Revision Level(0 - 65535):
This value, together with the configuration name and identical VLANs mapped
for STP instance IDs identifies the MST region configured on the switch.
Click
Apply
to define the configuration name and revision level.
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