D-Link DES-3028 Product Manual - Page 131
Spanning Tree, 802.1Q MSTP, 1Q MSTP
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DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch Figure 7- 33. Router Port window (Modify) The following parameters can be set: Parameter Description VID (VLAN ID) This is the VLAN ID that, along with the VLAN Name, identifies the VLAN where the MLD multicast router is attached. VLAN Name This is the name of the VLAN where the MLD multicast router is attached. Port Settings Ports on the Switch that will have a multicast router attached to them. There are three options for which to configure these ports: None - Select this option to not set these ports as router ports Static - Select this option to designate a range of ports as being connected to a multicastenabled router. This command will ensure that all packets with this router as its destination will reach the multicast-enabled router. Forbidden - Select this option to specify the port as not being a member of the VLAN and that the port is forbidden from becoming a member of the VLAN dynamically. Click Apply to implement the new settings. Spanning Tree This Switch supports three versions of the Spanning Tree Protocol; 802.1d STP, 802.1w Rapid STP and MSTP. 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 802.1d STP and 802.1w RSTP. 802.1Q 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). 117