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Port-based VLANs, VLAN Segmentation, VLAN and Trunk Groups, on VLAN 2.

UPC - 790069262722

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DES-3226L Layer 2 Fast Ethernet Switch User's Guide 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 its 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 group. For example, setting VLAN 1 members to ports 1, 2, 3, and 4 and VLAN 2 members to ports 1, 5, 6, and 7. Port 1 belongs to two VLAN groups. Ports 8, 9, and 10 are not configured to any VLAN group. This means ports 8, 9, and 10 are in 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 apply to the other member ports. Note: In order to use VLAN segmentation in conjunction with port trunk groups, you can first set the port trunk group(s), and then you may configure VLAN settings. If you wish to change the port trunk grouping with VLANs already in place, you will not need to reconfigure the VLAN settings after changing the port trunk group settings. VLAN settings will automatically change in conjunction with the change of the port trunk group settings. 76

Section	Page
Manual	1
Preface	6
Intended Readers	7
Typographical Conventions	7
Notes, Notices, and Cautions	8
Safety Instructions	9
	9
Safety Cautions	9
General Precautions for Rack-Mountable Products	11
Protecting Against Electrostatic Discharge	12
Introduction	13
	13
	13
	13
	13
Ethernet Technology	13
Switch Description	13
Features	13
Ports	13
Front-Panel Components	13
Side Panel Description	13
Rear Panel Description	13
Gigabit Combo Ports	13
Ethernet Technology	13
Fast Ethernet Technology	13
Gigabit Ethernet Technology	13
Switching Technology	14
Switch Description	14
Features	15
Ports	16
Important Note:	16
Front-Panel Components	16
	16
DES-3226L	16
LED Indicators	17
Rear Panel Description	18
Side Panel Description	18
Gigabit Combo Ports	18
Installation	20
	20
	20
	20
	20
Package Contents	20
Before You Connect to the Network	20
Installing the Switch Without the Rack	20
Rack Installation	20
Power On	20
Package Contents	20
Before You Connect to the Network	20
Installing the Switch Without the Rack	21
Installing the Switch in a Rack	21
Mounting the Switch in a standard 19” rack.	22
Power On	22
Power Failure	22
Connecting The Switch	23
	23
	23
	23
	23
Switch To End Node	23
Switch To Hub or Switch	23
Connecting To Network Backbone or Server	23
Switch To End Node	23
Switch to Hub or Switch	23
Connecting To Network Backbone or Server	24
Introduction To Switch Management	25
	25
	25
	25
	25
Management Options	25
Web-based Management Interface	25
SNMP-Based Management	25
Managing User Accounts	25
Command Line Console Interface Through The Serial Port	25
Connecting the Console Port (RS-232 DCE)	25
First Time Connecting to The Switch	25
Password Protection	25
SNMP Settings	25
IP Address Assignment	25
Connecting Devices to the Switch	25
Management Options	25
Web-based Management Interface	25
SNMP-Based Management	25
Command Line Console Interface Through The Serial Port	25
Connecting the Console Port (RS-232 DCE)	26
First Time Connecting to The Switch	27
Password Protection	29
SNMP Settings	30
Traps	31
MIBs	31
IP Address Assignment	31
Connecting Devices to the Switch	33
Introduction to Web-based Switch Configuration	34
	34
	34
	34
	34
Introduction	34
Login To Web manager	34
Web-Based User Interface	34
Basic Setup	34
Reboot	34
Basic Switch Setup	34
Network Management	34
Switch Utilities	34
Network Monitoring	34
IGMP Snooping Status	34
Introduction	34
Login to Web Manager	35
Web-based User Interface	36
Areas of the User Interface	36
Web Pages	37
Basic Setup	38
Switch Information	38
Basic Switch Setup	39
Serial Port Settings	42
Port Configurations	43
	44
	44
	44
	44
Port	44
User Accounts	45
Admin and User Privileges	46
Network Management	46
SNMPv3	46
SNMP View Table	47
SNMP Group Table	48
SNMP Community Table	50
SNMP Host Table	51
SNMP Engine ID	52
SNMP User Table	53
Management Station IP Addresses	54
Switch Utilities	55
TFTP Services	55
Download Firmware from TFTP Server	55
Download Configuration File	55
Upload Settings to TFTP Server	56
Upload History Log to TFTP Server	57
Ping Test	57
Network Monitoring	58
Statistics	58
Port Utilization	58
Port Error Packets	59
Port Packet Analysis	60
Table A: Size	61
Table B: Packet Type	61
	61
	61
	61
RX Bytes	61
Table C: Frame Type	62
MAC Address Table	62
Status	63
GVRP Status	63
Router Ports	64
IGMP Snooping Group Table	65
Switch History	65
	66
	66
	66
Sequence	66
802.1X Auth Diagnostics	67
802.1X Auth Statistics	67
802.1X Auth Session	67
802.1X Auth Client	68
802.1X Accounting Client	69
Factory Reset	69
Save Changes	69
Restart System	70
Logout	70
Advanced Setup	71
	71
	71
	71
	71
Port Segmentation	71
Spanning Tree	71
Forwarding	71
Configure QoS	71
Mirroring Configurations	71
VLAN Configurations	71
Link Aggregation	71
802.1x	71
System Log	71
Multicast Configurations	71
SSH Management	71
Port Segmentation	71
Spanning Tree	72
STP Switch Settings	72
STP Port Settings	74
	75
	75
	75
	75
	75
Port	75
Forwarding	76
MAC Forwarding	76
MAC Address Aging Time	76
Configure The Broadcast Storm Control Mode	76
Configure QoS	77
802.1p User Priority	78
Bandwidth Control Table	79
Mirroring Configurations	80
VLAN Configurations	81
	82
VLANs	82
Notes About VLANs on the DES-3226L	82
IEEE 802.1Q VLANs	83
802.1Q VLAN Packet Forwarding	83
802.1Q VLAN Tags	84
Port VLAN ID	85
Tagging and Untagging	86
Ingress Filtering	87
Initial VLAN Configuration	87
Port-based VLANs	88
VLAN Segmentation	88
VLAN and Trunk Groups	88
VLAN Mode Set	89
Switch GVRP	89
802.1Q VLANs	90
IEEE 802.1Q Port Settings	93
Port-Based VLANs	94
Link Aggregation	95
	95
Understanding Port Trunk Groups	95
Link Aggregation Group	97
Lacp Port Config	99
802.1x	101
802.1x State	103
802.1x Port Settings	103
802.1X Reauthenticate Ports	106
802.1X Initialize Ports	106
RADIUS Server Settings	106
	107
Local Server User	107
System Log	108
System Log State	108
System Log Server	108
Multicast Configuration	110
IGMP Snooping Global	110
	110
IGMP Snooping Configurations	110
	112
	112
	112
	112
	112
Max Response (1-25)	112
Querier State	112
Host Timeout \\(1 – 16711450\\)	112
Host Leave Timer \\(1 – 16711450\\)	112
Route Timeout \\(1 – 16711450\\)	112
State	112
Static Router Port Settings	113
SSH Management	113
SSH State	114
SSH Global	114
SSH Account Configuration	115
Technical Specifications	117
Cables and Connectors	120
Cable Lengths	121
Glossary	122
	131
	131
	131
	131
	131
	131
	131
Copyright Statement: No part of this publication or documentation accompanying this Product may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from D-Link Co	131
FCC Statement: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residentia	131

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DES-3226L Layer 2

Fast Ethernet Switch User’s Guide

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 its 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

group. For example, setting VLAN 1 members to ports 1, 2, 3, and 4 and VLAN 2 members

to ports 1, 5, 6, and 7. Port 1 belongs to two VLAN groups. Ports 8, 9, and 10 are not

configured to any VLAN group. This means ports 8, 9, and 10 are in 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 apply to the other member ports.

Note

: In order to use VLAN segmentation in conjunction with port trunk

groups, you can first set the port trunk group(s), and then you may

configure VLAN settings. If you wish to change the port trunk grouping

with VLANs already in place, you will not need to reconfigure the VLAN

settings after changing the port trunk group settings. VLAN settings will

automatically change in conjunction with the change of the port trunk

group settings.