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DGS-3224TGR Gigabit Ethernet Switch User’s Guide
59
Figure 6- 37.
IGMP Snooping Group Table window
Switch History
The Web manager allows the switch’s history log, as compiled by the switch’s management agent, to be viewed.
Figure 6- 38.
Switch History window
Page 72 / 160
DGS-3224TGR Gigabit Ethernet Switch User’s Guide
60
The switch can record event information in its own logs, to designated SNMP trap receiving stations, and to the PC
connected to the console manager. Clicking
Next
at the bottom of the window will allow you to display all the switch Trap
Logs.
The information in the Switch History log is described as follows:
Parameter
Description
Sequence
A counter incremented whenever an entry to the switch’s history log is made. The table
displays the last entry (highest sequence number) first.
Time
Displays the time in days, hours, and minutes since the switch was last restarted.
Log Text
Displays text describing the event that triggered the history log entry.
Factory Reset
The following window allows you to Reset, Reset Config, or Reset System. See the on-screen instructions for the
differences among each option.
Note that all changes are kept in normal memory. If a user does not save the result into NV-RAM with the Save Changes
function, the switch will recover all the settings the last user configured after the switch is rebooted.
Figure 6- 39.
Factory Reset window
Save Changes
The DGS-3224TGR has two levels of memory, normal RAM and non-volatile or NV-RAM.
To retain any configuration changes permanently, highlight
Save Changes
on the
Basic Setup
window. The following
window will appear to verify that your new settings have been saved to NV-RAM.
Figure 6- 40.
Save Changes window
Page 73 / 160
DGS-3224TGR Gigabit Ethernet Switch User’s Guide
61
Once the switch configuration settings have been saved to NV-RAM, they become the default settings for the switch. These
settings will be used every time the switch is rebooted.
Restart System
Figure 6- 41.
Restart System window
Logout
Figure 6- 42.
Logout window
Advanced Setup
This category includes:
Switch Advanced Settings
,
Spanning Tree
,
Forwarding
,
Configure QOS
,
Access Profile Mask
Setting
,
Port Security
,
Port Mirroring Configurations
,
VLAN Configurations
,
Link Aggregation
,
802.1X
,
TACACS
,
System Log
,
Multicast Configuration
,
SSH Management
, and
SSL Management
, as well as secondary windows.
Page 74 / 160
DGS-3224TGR Gigabit Ethernet Switch User’s Guide
62
Switch Advanced Settings
Figure 6- 43.
Switch Advanced Settings window
The information is described as follows:
Parameter
Description
SSH State
This allows you to enable or disable the Secure Shell feature.
HOL Prevention
This allows you to enable or disable Head of Line prevention.
Jumbo Frame
This allows you to enable or disable Jumbo Frame support.
ARP
Aging
Time
(minute)
This allows you to configure the timeout value of an entry maintained in the ARP table.
Year/Month/Date
This allows you to set the year, month, and date.
Hour/Minute/Secon
d
This allows you to set the hour, minute, and second.
Spanning Tree
The Switch supports 802.1d Spanning Tree Protocol (STP) and 802.1w Rapid Spanning Tree Protocol (RSTP). 802.1d STP
will be familiar to most networking professionals. However since 802.1w RSTP has been recently introduced to D-Link
managed Ethernet switches, a brief introduction to the technology is provided in Chapter Five’s “Spanning Tree” section.
The Spanning Tree section includes two windows,
STP Switch Settings
and
STP Port Settings
.
Page 75 / 160
DGS-3224TGR Gigabit Ethernet Switch User’s Guide
63
STP Switch Settings
The switch supports 802.1W Rapid Spanning Tree Protocol, which allows you to create alternative paths (with multiple
switches or other types of bridges) in your network. See the Spanning Tree Algorithm section of the “
Switch Management
and Operating Concepts
” chapter for a detailed explanation.
Figure 6- 44.
STP Switch Settings window
Click
Apply
after making changes to the window above.
The STP Switch parameters that you can change are:
Parameter
Description
Status
This drop-down menu allows you to enable the Spanning Tree Protocol setting.
Max Age (6-40 sec) <
20
>
The Maximum Age can be from
6
to
40
seconds. At the end of the Maximum
Age, if a BPDU has still not been received from the Root Bridge, your switch
will start sending its own BPDU to all other switches for permission to become
the Root Bridge. If it turns out that your switch has the lowest Bridge Identifier,
it will become the Root Bridge.
Hello Time (1-10 sec) <
2
>
The Hello Time can be from
1
to
10
seconds. This is the interval between two
transmissions of BPDU packets sent by the Root Bridge to tell all other
switches that it is indeed the Root Bridge. If you set a Hello Time for your
switch, and it is not the Root Bridge, the set Hello Time will be used if and
when your switch becomes the Root Bridge.
Forward Delay (4-30 sec)
<
15
>
The Forward Delay can be from
4
to
30
seconds. This is the time any port on
the switch spends in the listening state while moving from the blocking state to
the forwarding state.

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