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D-Link DES-1210G [26/36] Port based vlans
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DES-1210G Fast Ethernet/Gigabit Ethernet Switch User’s Guide
18
Port-based VLANs
The DES-1210G supports up to 9 port-based VLANs. Port-based VLANs limit traffic that flows
into and out of switch ports. Thus, all devices connected to a port are members of the VLAN(s)
the port belongs to, whether there is a single computer directly connected to a switch, or an entire
department.
On port-based VLANs, NICs do not need to be able to identify 802.1Q tags in packet headers.
NICs send and receive normal Ethernet packets. If the packet’s destination lies on the same
segment, communications take place using normal Ethernet protocols. Even though this is
always the case, when the destination for a packet lies on another switch port, VLAN
considerations come into play to decide if the packet gets dropped by the switch or delivered.
VLAN Segmentation
Take for example a packet that is transmitted by a machine on Port 1 that is a member of
VLAN 2. If the destination lies on another port (found through a normal forwarding table
lookup), the switch then looks to see if the other port (Port 10) is a member of VLAN 2 (and
can therefore receive VLAN 2 packets). If port 10 is not a member of VLAN 2, then the packet
will be dropped by the switch and will not reach it’s destination. If Port 10 is a member of
VLAN 2, the packet will go through. This selective forwarding feature based on VLAN criteria
is how VLANs segment networks. The key point being that Port 1 will only transmit on VLAN
2.
Network resources such as printers and servers however, can be shared across VLANs. This is
achieved by setting up overlapping VLANs. That is ports can belong to more than one VLAN
groups. Setting VLAN 1 members are port 1,2,3,4 and VLAN 2 members are 1,5,6,7. The Port 1 is
belonging to two VLAN groups. The port 8, 9, 10 are not configured to any VLAN group. This is
means port 8,9,10 are the same VLAN group.
VLAN and Trunk Groups
The members of a trunk group have the same VLAN setting. Any VLAN setting on the members
of a trunk group will applied to the other member ports.
Содержание
- Wichtige sicherheitshinweise 2
- Hardware 3
- Limited warranty 3
- Software 3
- Copyright statement 4
- D link offices for registration and warranty service 4
- Limitation of liability 4
- Limitation of warranties 4
- Trademarks 4
- Bsmi warning 5
- Ce mark warning 5
- Fcc warning 5
- Vcci a warning 5
- Table of contents 6
- About this guide 7
- Conventions 7
- Overview of this user s guide 7
- Fast ethernet technology 9
- Gigabit ethernet technology 9
- Introduction 9
- Ntroduction 9
- Des 1210g 10 100 1000 mbps stand alone switch 10
- General description of switch 10
- Switching technology 10
- Performance features 11
- Npacking and 12
- Unpacking 12
- Unpacking and setup 12
- Desktop or shelf installation 13
- Rack installation 13
- Power failure 14
- Power on 14
- Dentifying 15
- Front panel 15
- Identifying external components 15
- Omponents 15
- Xternal 15
- Led indicators 16
- Rear panel 16
- Side panels 16
- Connecting the switch 17
- Onnecting 17
- Switch to end node 17
- Switch to hub or switch 18
- Connecting to network backbone or server 19
- Anagement 20
- Console port rs 232 dce 20
- Local console management 20
- Switch management 20
- Figure 5 1 management console screen figure 5 1 management console screen 21
- Once you have connected to the console port on the switch you should see a window like that pictured in figure 5 1 if the screen appears but is blank press control and r ctrl r simultaneously to refresh the screen use this screen to perform all the available management functions 21
- The command keys are displayed on the bottom of screen move the cursor to the correct position to change function setting the command keys are described below 21
- User interface 21
- Flow control 22
- Port monitor 22
- Port speed 22
- Port trunk groups 22
- Priority queues 22
- Software features 22
- Vlan group 23
- Anagement 24
- Management concepts 24
- Oncepts 24
- Port trunk groups 24
- Ieee 802 p priority 25
- Port based vlans 26
- Vlan and trunk groups 26
- Vlan segmentation 26
- Echnical 27
- General 27
- Pecifications 27
- Physical and environmental 27
- Technical specifications 27
- Performance 28
- Physical and environmental 28
- Ables and 29
- Cables and connectors 29
- Onnectors 29
- At the other end of the cable connect wires 1 and 2 to contacts 3 and 6 respectively likewise connect wires 3 and 6 to contacts 1 and 2 refer to the following diagram 30
- Crossover cable for use with mdi x to mdi x and or mdi ii to mdi ii connections crossover cable for use with mdi x to mdi x and or mdi ii to mdi ii connections 30
- Leave one end of the cable as is with the rj 45 connector intact the wiring at just one end of the cable needs to be modified 30
- Straight cable for use with mdi ii to mdi x connections straight cable for use with mdi ii to mdi x connections 30
- The standard rj 45 pin assignments 30
- With a crossover cable two pairs of wires are switched at one connector end carry out the following steps to create a customized crossover twisted pair cable 30
- 220 meters 31
- 275 meters 31
- 500 meters 31
- 550 meters 31
- Base sx fiber optic cable maximum lengths 31
- Standard media type 31
- Use the following table to as a guide for the maximum lengths for 1000base sx cable 31
- Offices 33
- Registration card 35
- Your comments on this product _________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ _________________________________________________________________________________ 35
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