D-Link DGS-3212SR [81/224] Spanning tree
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DGS-3212SR Stackable Gigabit Layer 2 Switch
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 either 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. These instances will be classified by an MSTI ID. 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 one virtual bridge that runs a single spanning tree.
Consequentially, frames assigned to different VLANs will follow different data routes within administratively established
regions on the network, continuing to allow simple and full processing of frames, regardless of administrative errors in
defining VLANs and their respective spanning trees.
Each switch utilizing the MSTP on a network will have a single MSTP configuration that will have the following three
attributes:
1. A configuration name defined by an alphanumeric string of up to 32 characters (defined in the MST
Configuration Table window in the Configuration Name field).
2. A configuration revision number (named here as a Revision Level and found in the MST Configuration Table
window) and;
3. A 4094-element table (defined here as a VID List in the MST Configuration Table window) that will ssociate
each of the possible 4094 VLANs supported by the Switch for a given instance.
To utilize the MSTP function on the Switch, three steps need to be taken:
1. The Switch must be set to the MSTP setting (found in the STP Bridge Global Settings window in the STP
Version field)
2. The correct spanning tree priority for the MSTP instance must be entered (defined here as a Priority in the MST
Configuration Table window when configuring MSTI ID settings).
3. VLANs that will be shared must be added to the MSTP Instance ID (defined here as a VID List in the MST
Configuration Table window when configuring an MSTI ID settings).
802.1w Rapid Spanning Tree
The Switch implements three versions of the Spanning Tree Protocol, the Multiple Spanning Tree Protocol (MSTP) as
defined by the IEEE 802.1s, 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 functions 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.
Port Transition States
An essential difference between the three protocols is in the way ports transition to a forwarding state and in the way this
transition relates to the role of the port (forwarding or not forwarding) in the topology. MSTP and RSTP combine the
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Содержание
- D link dgs 3212sr 1
- Manual 1
- Port gigabit layer 2 stackable switch 1
- Release iii 1
- Table of contents 3
- About this manual 8
- Intended readers 8
- Typographical conventions 8
- Notes notices and cautions 9
- Safety cautions 9
- Safety instructions 9
- General precautions for rack mountable products 10
- Protecting against electrostatic discharge 12
- Features 13
- Introduction 13
- Section 1 13
- Switch description 13
- Front panel components 15
- Led indicators 15
- Stacking led indicators 16
- Rear panel description 17
- Rps connector 17
- Dem 340mg sfp mini gbic module 18
- Dem 340t 1000base t module 18
- Plug in modules 18
- Dem 540 ieee 1394 stacking module 19
- Restrictions and cautions for stacking 19
- Switch stacking 19
- Command line console interface through the serial port or telnet 21
- Management options 21
- Snmp based management 21
- Web based management interface 21
- Before you connect to the network 22
- Installation 22
- Package contents 22
- Section 2 22
- Installing the switch in a rack 23
- Installing the switch without the rack 23
- Mounting the switch in a standard 19 rack 24
- Connecting stacked switch groups 25
- Stacking connections with ieee 1394 ethernet cabling and fiber optic transceiver cabling 25
- Configuring a switch group for stacking 26
- Unit id display for switches in a switch stack 27
- Dgs 3212sr stackable gigabit layer 2 switch 28
- External redundant power system 28
- Connecting the console port 29
- Password protection 29
- Snmp settings 31
- Ip address assignment 32
- Connecting devices to the switch 33
- Basic switch management 34
- Before you start 34
- Section 3 34
- Areas of the user interface 35
- Web based user interface 35
- Login to web manager 36
- Web pages and folders 36
- Basic setup 37
- Switch information 37
- Switch ip settings 37
- Setting the switch s ip address using the console interface 39
- Security ip management stations configuration 40
- User account management 40
- Admin and user privileges 41
- Factory reset 42
- Save changes 42
- Restart system 43
- Advanced settings 44
- Configure stacking 46
- Switch stack management 46
- Basic configuration 49
- Section 4 49
- Ip address 50
- Switch information 50
- Setting the switch s ip address using the console interface 52
- Advanced settings 53
- Port configuration 55
- Port description 57
- Port mirroring 58
- Traffic control 59
- Link aggregation 60
- Understanding port trunk groups 60
- Lacp port settings 62
- Authentication server 64
- Port access entity 802 x 64
- X port based and mac based access control 64
- Authenticator 65
- Authentication process 66
- Client 66
- Port based network access control 67
- Understanding 802 x port based and mac based network access control 67
- Ethernet switch 68
- Mac based network access control 68
- Network access controlled port 68
- Network access uncontrolled port 68
- Radius server 68
- X authenticator settings 69
- Pae system control 71
- X capability settings 71
- Initializing ports for port based 802 x 72
- Initializing ports for mac based 802 x 73
- Reauthenticate port s for port based 802 x 74
- Reauthenticate port s for mac based 802 x 75
- Radius server 76
- Igmp snooping 77
- Igmp snooping configuration 77
- Static router ports entry 79
- Port transition states 81
- S mstp 81
- Spanning tree 81
- W rapid spanning tree 81
- D 802 w 802 s compatibility 82
- Edge port 82
- P2p port 82
- Stp bridge global settings 83
- Mst configuration table 86
- Msti settings 89
- Stp instance settings 90
- Stp port settings 92
- Forwarding filtering 94
- Unicast forwarding 94
- Multicast forwarding 95
- Ieee 802 q vlans 96
- Q vlan packet forwarding 96
- Understanding 802 q vlans 96
- Q vlan tags 97
- Port vlan id 98
- Tagging and untagging 98
- Ingress filtering 99
- Q static vlans 100
- Gvrp settings 103
- The advantages of qos 105
- Understanding qos 106
- P default priority 107
- P user priority 107
- Qos output scheduling configuration 108
- Traffic segmentation 109
- Port bandwidth 110
- Mac notification 111
- Mac notification global settings 111
- Mac notification port settings 112
- Port security 113
- Port security configuration 113
- Port lock entry delete 114
- Port security clear 114
- System log server 115
- Sntp settings 117
- Time setting 117
- Time zone and dst settings 118
- Access profile table 120
- Section 5 131
- Security 131
- Trusted host 131
- Download certificate 132
- Secure socket layer ssl 132
- Configuration 133
- Secure shell ssh 135
- Ssh configuration 135
- Ssh algorithm 137
- Ssh user authentication 139
- Access authentication control 141
- Policy parameters 142
- Application authentication settings 143
- Authentication server group 144
- Authentication server host 146
- Login method lists 148
- Enable method lists 150
- Local enable password 152
- Enable admin 153
- Management 154
- Section 6 154
- User accounts 154
- Admin and user privileges 155
- Snmp settings 155
- Snmp user table 156
- Snmp user table display 157
- Snmp view table 159
- Snmp group table 160
- Snmp community table 162
- Snmp host table 163
- Snmp engine id 164
- Monitoring 165
- Section 7 165
- Stack information 166
- Port utilization 169
- Cpu utilization 170
- Packets 171
- Received packets 171
- Received unicast multicast broadcast packets 173
- Transmitted packets 175
- Errors 177
- Received errors 177
- Transmitted errors 179
- Packet size 181
- Mac address 183
- Switch history log 185
- Igmp snooping table 186
- Igmp snooping forwarding 187
- Vlan status 188
- Router port 189
- Session table 190
- Download firmware 191
- Maintenance 191
- Section 8 191
- Tftp services 191
- Download configuration file 192
- Upload configuration 192
- Upload log 192
- Ping test 193
- Save changes 193
- Factory reset 194
- Logout 195
- Restart system 195
- Section 9 196
- Single ip management 196
- Sim settings 198
- Topology 199
- Tool tips 202
- Group icon 204
- Right click 204
- Commander switch icon 205
- Member switch icon 206
- Candidate switch icon 207
- Device 208
- Menu bar 208
- Configuration file backup restore 209
- Firmware upgrade 209
- Appendix a 210
- Technical specifications 210
- Appendix b 212
- Cables and connectors 212
- Appendix c 213
- Cable lengths 213
- Glossary 214
- International offices 217
- After an rma number is issued the defective product must be packaged securely in the original or other suitable shipping package to ensure that it will not be damaged in transit and the rma number must be prominently marked on the outside of the package the package must be mailed or otherwise shipped to d link with all costs of mailing shipping insurance prepaid d link shall never be responsible for any software firmware information or memory data of purchaser contained in stored on or integrated with any product returned to d link pursuant to this warranty 218
- Hardware 218
- Limitation of liability 218
- Limited warranty 218
- Warranties exclusive 218
- D link offices for registration and warranty service 219
- Software 219
- Register online your d link product at http support dlink com register 222
- Answers to the following questions help us to support your product 223
- Computer e g compaq 486 223
- Computer serial no 223
- How many employees work at installation site 223
- Print type or use block letters 223
- Product installed in 223
- Product installed in type of 223
- Product model product serial no 223
- Product was purchased from 223
- Registration card 223
- What applications are used on your network 223
- What category best describes your company 223
- What network management program does your organization use 223
- What network medium media does your organization use 223
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- What network protocol s does your organization use 223
- Where and how will the product primarily be used 223
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