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Basic Settings > General Settings > SNTP, continued

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Chapter 6 General Settings Table 7 Basic Settings > General Settings > SNTP (continued) LABEL DESCRIPTION Enable Network Time Protocol Select this option to use Network Time Protocol (NTP) for the time service. NTP Server Select a pre-designated time server or type the IP address of your time server. The Switch searches for the timeserver for up to 60 seconds. Time Zone Select the time difference between UTC (Universal Time Coordinated, formerly known as GMT, Greenwich Mean Time) and your time zone from the drop-down list box. Daylight Saving Settings Daylight saving is a period from late spring to early fall when many countries set their clocks ahead of normal local time by one hour to give more daytime light in the evening. State Select Enable if you want to use Daylight Saving Time. Otherwise, select Disable to turn it off. Start Date Configure the day and time when Daylight Saving Time starts if you enabled Daylight Saving Time. The time is displayed in the 24 hour format. Here are a couple of examples: Daylight Saving Time starts in most parts of the United States on the second Sunday of March. Each time zone in the United States starts using Daylight Saving Time at 2 A.M. local time. So in the United States you would select Second, Sunday, March and 2:00. End Date Daylight Saving Time starts in the European Union on the last Sunday of March. All of the time zones in the European Union start using Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in the European Union you would select Last, Sunday, March and the last field depends on your time zone. In Germany for instance, you would select 2:00 because Germany's time zone is one hour ahead of GMT or UTC (GMT+1). Configure the day and time when Daylight Saving Time ends if you enabled Daylight Saving Time. The time field uses the 24 hour format. Here are a couple of examples: Daylight Saving Time ends in the United States on the last Sunday of October. Each time zone in the United States stops using Daylight Saving Time at 2 A.M. local time. So in the United States you would select First, Sunday, November and 2:00. Apply Refresh Daylight Saving Time ends in the European Union on the last Sunday of October. All of the time zones in the European Union stop using Daylight Saving Time at the same moment (1 A.M. GMT or UTC). So in the European Union you would select Last, Sunday, October and the last field depends on your time zone. In Germany for instance, you would select 2:00 because Germany's time zone is one hour ahead of GMT or UTC (GMT+1). Click Apply to save your changes back to the Switch. Click Refresh to begin configuring this screen afresh. 50 GS1510 Series User's Guide

Section	Page
GS1510-16/GS1510-24	1
About This User's Guide	3
Document Conventions	5
Safety Warnings	7
Contents Overview	9
Table of Contents	11
Introduction and Hardware Overview	17
Getting to Know Your Switch	19
1.1 Introduction	19
1.1.1 Backbone Application	19
1.1.2 Bridging Example	20
1.1.3 High Performance Switching Example	21
1.1.4 IEEE 802.1Q VLAN Application Examples	21
1.2 Good Habits for Managing the Switch	22
Hardware Installation and Connection	23
2.1 Freestanding Installation	23
2.2 Mounting the Switch on a Rack	24
2.2.1 Rack-mounted Installation Requirements	24
2.2.2 Attaching the Mounting Brackets to the Switch	24
2.2.3 Mounting the Switch on a Rack	25
Hardware Overview	27
3.1 Front Panel	27
3.1.1 Ethernet Ports	28
3.1.2 Mini-GBIC Slots	28
3.1.3 The RESET Button	30
3.2 LEDs	30
3.3 Rear Panel	31
3.3.1 Power Connector	31
Basic Settings	33
The Web Configurator	35
4.1 Introduction	35
4.2 Device Auto Discovery Utility	35
4.3 System Login	35
4.3.1 Smart Mode	36
4.3.2 The Advanced Main Screen	40
4.3.3 The Navigation Panel	40
4.3.4 Change Your Password	42
4.4 Saving Your Configuration	43
4.5 Switch Lockout	43
4.6 Resetting the Switch	43
4.7 Logging Out of the Web Configurator	44
System	45
5.1 System Screen	45
General Settings	47
6.1 What You Can Do	47
6.2 System	47
6.3 Jumbo Frame	48
6.4 SNTP	49
MAC Management	51
7.1 Overview	51
7.2 What You Can Do	51
7.3 What You Need to Know	51
7.4 Static MAC Settings	52
7.5 MAC Table	53
Port Mirroring	55
8.1 Port Mirroring Settings	55
Port Settings	57
9.1 Port Settings	57
9.1.1 Auto Negotiation	57
9.1.2 Flow Control	57
Advanced Settings	61
VLAN	63
10.1 Overview	63
10.2 What You Can Do	63
10.3 What You Need to Know	63
10.3.1 Introduction to IEEE 802.1Q Tagged VLANs	63
10.3.2 Forwarding Tagged and Untagged Frames	64
10.4 Port Isolation	64
10.5 VLAN Settings	67
10.6 Tag Settings	68
10.7 Port Settings	69
EEE	71
11.1 Overview	71
11.1.1 EEE Screen	71
IGMP Snooping	73
12.1 Overview	73
12.2 What You Can Do	73
12.3 What You Need to Know	73
12.3.1 IGMP Snooping and VLANs	74
12.4 General Settings	74
12.5 Port Settings	75
Link Aggregation	77
13.1 Overview	77
13.2 What You Can Do	77
13.3 What You Need to Know	77
13.3.1 Dynamic Link Aggregation	77
13.4 Static Trunk	78
13.5 LACP	79
Loop Guard	81
14.1 Overview	81
14.2 What You Need to Know	81
14.3 Loop Guard	83
QoS	85
15.1 Overview	85
15.2 What You Can Do	85
15.3 What You Need to Know	85
15.3.1 Queuing algorithms	85
15.3.2 QoS Enhancement	86
15.4 Port Priority	86
15.5 IP DiffServ (DSCP)	87
15.5.1 Differentiated Services Code Point (DSCP)	88
15.6 Priority/Queue Mapping	89
15.7 Queuing Method	90
Storm Control	93
16.0.1 Broadcast Storm Control Setup	93
Spanning Tree Protocol	95
17.1 Overview	95
17.2 What You Can DO	95
17.3 What You Need to Know	95
17.3.1 STP Terminology	96
17.3.2 How STP Works	96
17.4 General Settings	97
17.5 STP Status Screen	98
Security and Management	101
IP Source Guard	103
18.1 Overview	103
18.2 What You Can Do	103
18.3 What You Need To Know	103
18.3.1 DHCP Snooping Overview	104
18.3.2 ARP Inspection Overview	105
18.4 DHCP Snooping	107
18.5 Port Settings	108
18.6 ARP Inspection	110
18.6.1 Filter Table	111
18.7 Binding Table	112
18.7.1 Static Entry Settings	112
18.7.2 Binding Table	114
802.1x	117
19.1 Overview	117
19.2 What You Can Do	117
19.3 What You Need to Know	118
19.3.1 IEEE 802.1x Authentication	118
19.3.2 Local User Accounts	118
19.4 Global Settings	118
19.5 Port Settings	120
Web Authentication	123
20.1 Overview	123
20.2 What You Can Do	123
20.3 What You Need to Know	123
20.3.1 User Authentication Experience	124
20.4 Configuration	125
20.5 Customization	126
Maintenance	129
21.1 Overview	129
21.2 What You Can Do	129
21.3 Configuration	130
21.3.1 Backup Settings	130
21.3.2 Upgrade Configuration	131
21.3.3 Restore Factory Default Settings	131
21.4 Firmware	132
21.5 Reboot	132
21.6 System Log	133
21.6.1 Syslog	133
SNMP	135
22.1 Overview	135
22.2 What You Can Do	135
22.3 What You Need to Know	135
22.3.1 About SNMP	135
22.3.2 Supported MIBs	137
22.3.3 SNMP Traps	137
22.4 SNMP Settings	137
22.5 Community Name	138
22.6 Trap Receiver	140
User Account	143
23.1 Overview	143
23.2 User Account Screen	143
Troubleshooting & Product Specifications	145
Troubleshooting	147
24.1 Power, Hardware Connections, and LEDs	147
24.2 Switch Access and Login	148
Product Specifications	151
25.1 General Switch Specifications	151
Appendices and Index	157
Device Auto Discovery	159
IP Addresses and Subnetting	165
Legal Information	175
Open Software Announcements	179

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Chapter 6 General Settings

GS1510 Series User’s Guide

Enable

Network Time

Protocol

Select this option to use Network Time Protocol (NTP) for the time

service.

NTP Server

Select a pre-designated time server or type the IP address of your time

server. The Switch searches for the timeserver for up to 60 seconds.

Time Zone

Select the time difference between UTC (Universal Time Coordinated,

formerly known as GMT, Greenwich Mean Time) and your time zone from

the drop-down list box.

Daylight Saving Settings

Daylight saving is a period from late spring to early fall when many countries set their

clocks ahead of normal local time by one hour to give more daytime light in the evening.

State

Select

Enable

if you want to use Daylight Saving Time. Otherwise,

select

Disable

to turn it off.

Start Date

Configure the day and time when Daylight Saving Time starts if you

enabled Daylight Saving Time. The time is displayed in the 24 hour

format. Here are a couple of examples:

Daylight Saving Time starts in most parts of the United States on the

second Sunday of March. Each time zone in the United States starts

using Daylight Saving Time at 2 A.M. local time. So in the United States

you would select

Second

Sunday

March

and

2:00

Daylight Saving Time starts in the European Union on the last Sunday of

March. All of the time zones in the European Union start using Daylight

Saving Time at the same moment (1 A.M. GMT or UTC). So in the

European Union you would select

Last

Sunday

March

and the last

field depends on your time zone. In Germany for instance, you would

select

2:00

because Germany's time zone is one hour ahead of GMT or

UTC (GMT+1).

End Date

Configure the day and time when Daylight Saving Time ends if you

enabled Daylight Saving Time. The time field uses the 24 hour format.

Here are a couple of examples:

Daylight Saving Time ends in the United States on the last Sunday of

October. Each time zone in the United States stops using Daylight Saving

Time at 2 A.M. local time. So in the United States you would select

First

Sunday

November

and

2:00

Daylight Saving Time ends in the European Union on the last Sunday of

October. All of the time zones in the European Union stop using Daylight

Saving Time at the same moment (1 A.M. GMT or UTC). So in the

European Union you would select

Last

Sunday

October

and the last

field depends on your time zone. In Germany for instance, you would

select

2:00

because Germany's time zone is one hour ahead of GMT or

UTC (GMT+1).

Apply

Click

Apply

to save your changes back to the Switch.

Refresh

Click

Refresh

to begin configuring this screen afresh.

Table 7

Basic Settings > General Settings > SNTP

(continued)

LABEL

DESCRIPTION