Product Manual

The following parameters can be set:
Parameter Description
DES-3526 / DES-3526DC Fast Ethernet Layer 2 Switch
Figure 6- 17. Static Router Ports Settings window
VID (VLAN ID) 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.
Member Ports Ports on the Switch that will have a multicast router attached to them.
Click Apply to implement the new settings, Click the Show All Static Router Port Entries link to
return to the Current Static Router Port Entries window.
Spanning Tree
This Switch supports three versions of the Spanning Tree Protocol; 802.1d STP, 802.1w Rapid STP
and 802.1s MSTP. 802.1d STP will be familiar to most networking professionals. However, since
802.1w RSTP and 802.1s MSTP 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
802.1d STP, 802.1w RSTP and 802.1s MSTP.
802.1s MSTP
Multiple Spanning Tree Protocol, or MSTP, is a standard defined by the IEEE community that allows
multiple VLANs to be mapped to a single spanning tree instance, which will provide multiple
pathways across the network. Therefore, these MSTP configurations will balance the traffic load,
preventing wide scale disruptions when a single spanning tree instance fails. This will allow for faster
convergences of new topologies for the failed instance. Frames designated for these VLANs will be
processed quickly and completely throughout interconnected bridges utilizing any of the three
spanning tree protocols (STP, RSTP or MSTP).
This protocol will also tag BDPU packets so receiving devices can distinguish spanning tree instances,
spanning tree regions and the VLANs associated with them. An MSTI ID will classify these instances.
MSTP will connect multiple spanning trees with a Common and Internal Spanning Tree (CIST). The
CIST will automatically determine each MSTP region, its maximum possible extent and will appear as
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