Dell X1000 Networking X-Series Switches User Guide - Page 21

Spanning Tree Protocol Features

Page 21 highlights

FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Astute\User Guide\Dell_Astute_Features.fm Private VLAN The Private VLAN feature provides Layer 2 isolation between ports that share the same Broadcast domain, or in other words, it creates a point-tomultipoint Broadcast domain. The ports can be located anywhere in the Layer 2 network. For more information, see Private VLAN. Multicast TV VLAN The Multicast TV VLAN feature provides the ability to supply multicast transmissions to Layer 2-isolated subscribers, without replicating the multicast transmissions for each subscriber VLAN. The subscribers are the only receivers of the multicast transmissions. For more information, see Multicast TV VLAN. Spanning Tree Protocol Features Spanning Tree Protocol (STP) 802.1d Spanning Tree is a standard Layer 2 switch requirement that enables bridges to automatically prevent and resolve Layer 2 forwarding loops. Switches exchange configuration messages using specifically-formatted frames, and selectively enable and disable forwarding on ports. For more information, see Rapid Spanning Tree. Fast Link STP can take 30-60 seconds to converge. During this time, STP detects possible loops, enabling time for status changes to propagate and for relevant devices to respond. This period of 30-60 seconds is considered too long a response time for many applications. The Fast Link option bypasses this delay, and can be used in network topologies where forwarding loops do not occur, for example, on edge ports connecting to endpoint devices. For more information on enabling Fast Link for ports and LAGs, see Rapid Spanning Tree. DELL CONFIDENTIAL - PRELIMINARY 8/9/16 - FOR PROOF ONLY Features 21

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Features
21
FILE LOCATION:
C:\Users\gina\Desktop\Checkout_new\Dell Astute\User
Guide\Dell_Astute_Features.fm
DELL CONFIDENTIAL – PRELIMINARY 8/9/16 - FOR PROOF ONLY
Private VLAN
The Private VLAN feature provides Layer 2 isolation between ports that share
the same Broadcast domain, or in other words, it creates a point-to-
multipoint Broadcast domain. The ports can be located anywhere in the
Layer 2 network.
For more information, see
Private VLAN
.
Multicast TV VLAN
The Multicast TV VLAN feature provides the ability to supply multicast
transmissions to Layer 2-isolated subscribers, without replicating the
multicast transmissions for each subscriber VLAN. The subscribers are the
only receivers of the multicast transmissions.
For more information, see
Multicast TV VLAN
.
Spanning Tree Protocol Features
Spanning Tree Protocol (STP)
802.1d Spanning Tree is a standard Layer 2 switch requirement that enables
bridges to automatically prevent and resolve Layer 2 forwarding loops.
Switches exchange configuration messages using specifically-formatted
frames, and selectively enable and disable forwarding on ports.
For more information, see
Rapid Spanning Tree
.
Fast Link
STP can take 30–60 seconds to converge. During this time, STP detects
possible loops, enabling time for status changes to propagate and for relevant
devices to respond. This period of 30-60 seconds is considered too long a
response time for many applications. The Fast Link option bypasses this
delay, and can be used in network topologies where forwarding loops do not
occur, for example, on edge ports connecting to endpoint devices.
For more information on enabling Fast Link for ports and LAGs, see
Rapid
Spanning Tree
.