D-Link DGS-3312SR Product Manual - Spanning Tree
DGS-3312SR Gigabit Layer 3 Switch
The window displays all of the current entries to the Switch’s static router port table. To add or modify an entry, click the
Modify button. This will open the Static Router Ports Settings window, as shown below.
Figure 4- 21. Static Router Ports Settings window
To configure a static router port(s):
1. Select the Unit containing the static router port.
2. Select the Port or Ports that will become static router ports.
3. Click
Apply to let the changes take effect.
The following parameters are listed in the Static Router Portwindows.
Parameter
Description
VLAN ID (VID)
This is the VLAN ID that, along with the VLAN name, identifies the VLAN where the
multicast router is attached.
VLAN Name
This is the name of the VLAN where the multicast router is attached.
Unit
This is the Unit ID of the Switch in a Switch stack for which you are creating an entry
into the Switch’s static router port table.
Member Ports
There are the ports on the Switch that will have a multicast router attached to them.
Spanning Tree
The Switch supports 802.1d Spanning Tree Protocol (STP) and 802.1w Rapid Spanning Tree Protocol (RSTP). 802.1d STP
will be familiar to most networking professionals. However since 802.1w RSTP has been recently introduced to D-Link
managed Ethernet Switches, a brief introduction to the technology is provided below followed by a description of how to
set up 802.1 d STP and 802.1w RSTP.
802.1w Rapid Spanning Tree
The Switch implements two versions of the Spanning Tree Protocol, the Rapid Spanning Tree Protocol (RSTP) as defined
by the IEEE 802.1w specification and a version compatible with the IEEE 802.1d STP. RSTP can operate with legacy
equipment implementing IEEE 802.1d, however the advantages of using RSTP will be lost.
The IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) evolved from the 802.1d STP standard. RSTP was developed in
order to overcome some limitations of STP that impede the function of some recent Switching innovations, in particular,
certain Layer 3 function that are increasingly handled by Ethernet Switches. The basic function and much of the
terminology is the same as STP. Most of the settings configured for STP are also used for RSTP. This section introduces
some new Spanning Tree concepts and illustrates the main differences between the two protocols.
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