D-Link DMS-1100 User Manual - Page 66

L2 Features > STP > STP Global Settings, By default, Rapid Spanning Tree is disabled. If enabled

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D-Link DMS-1100 Series User Manual Figure 4.76 - L2 Features > VLAN > Voice VLAN > Voice VLAN LLDP-MED Device L2 Features > STP > STP Global Settings The Switch implements three versions of the Spanning Tree Protocol: Rapid Spanning Tree Protocol (RSTP) as defined by IEEE 802.1w, a version compatible with the IEEE 802.1D STP and Multiple Spanning Tree Protocol (MSTP), as defined by IEEE802.1. RSTP can operate with legacy equipment implementing IEEE 802.1D, however the advantages of using RSTP will be lost. The Rapid Spanning Tree Protocol (RSTP) evolved from the 802.1D STP standard and was developed in order to overcome some of the limitations of STP that impede the function of some recent switching innovations. The basic function and much of the terminology is the same and 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. The IEEE 802.1 Multiple Spanning Tree (MSTP) provides various load balancing techniques 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. By default, Rapid Spanning Tree is disabled. If enabled, the Switch will listen for Bridge Protocol Data Unit (BPDU) packets and its accompanying Hello packet. The BPDU packets are sent even if a BPDU packet is not received. Therefore, each link between bridges is sensitive to the status of the link. Ultimately this difference results in faster detection of failed links, and therefore faster topology adjustment. By default Multiple Spanning Tree is enabled. It will tag BPDU packets to receiving devices and distinguish spanning tree instances, spanning tree regions and the VLANs associated with them. After enabling STP, configure the STP Global Settings (shown below). 60

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D-Link DMS-1100 Series User Manual
60
Figure 4.76 – L2 Features > VLAN > Voice VLAN > Voice VLAN LLDP-MED Device
L2 Features > STP > STP Global Settings
The Switch implements three versions of the Spanning Tree Protocol: Rapid Spanning Tree Protocol (RSTP)
as defined by IEEE 802.1w, a version compatible with the IEEE 802.1D STP and Multiple Spanning Tree
Protocol (MSTP), as defined by IEEE802.1. RSTP can operate with legacy equipment implementing IEEE
802.1D, however the advantages of using RSTP will be lost.
The Rapid Spanning Tree Protocol (RSTP) evolved from the 802.1D STP standard and was developed in
order to overcome some of the limitations of STP that impede the function of some recent switching
innovations. The basic function and much of the terminology is the same and 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.
The IEEE 802.1 Multiple Spanning Tree (MSTP) provides various load balancing techniques 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.
By default, Rapid Spanning Tree is disabled. If enabled, the Switch will listen for Bridge Protocol Data Unit
(BPDU) packets and its accompanying Hello packet. The BPDU packets are sent even if a BPDU packet is
not received. Therefore, each link between bridges is sensitive to the status of the link. Ultimately this
difference results in faster detection of failed links, and therefore faster topology adjustment.
By default Multiple Spanning Tree is enabled. It will tag BPDU packets to receiving devices and distinguish
spanning tree instances, spanning tree regions and the VLANs associated with them.
After enabling STP, configure the STP Global Settings (shown below).