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Test cable connections, Resolve a subnet conflict to access the switch

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Gigabit Ethernet Plus Switches Test cable connections You can use the cable diagnostic feature to easily find out the health status of network cables. If any problems exist, this feature helps quickly locate the point where the cabling fails, allowing connectivity issues to be fixed much faster, potentially saving technicians hours of troubleshooting. If an error is detected, the distance at which the fault is detected is stated in meters. (This is the distance from the port.) To test cable connections: 1. Connect your computer to the same network as the switch. You can use a WiFi or wired network connection, or connect directly to a switch that is off-network using an Ethernet cable. 2. Launch a web browser. 3. In the address field of your web browser, enter the IP address of the switch. The login window opens. 4. Enter the switch password. The password is the one that you specified the first time that you logged in. The user name and password are case-sensitive. The Home page displays. 5. Select Diagnostics > Cable Test. 6. Select one or more ports to test the cable that is attached to the port. 7. Click the NEXT button. The switch tests the cable connection for the selected ports and displays the results. This process might take up to a few minutes. 8. Click the DONE button to dismiss the test results. You can run another cable test if desired. Resolve a subnet conflict to access the switch If you power on the switch before you connect it to a network that includes a DHCP server, the switch uses its own default IP address of 192.168.0.239. This subnet might Diagnostics and 87 Troubleshooting User Manual

Section	Page
Contents	3
1. Hardware	6
Related documentation	7
Switch package contents	7
Supported switch models	7
Model GS305EP, GS305EPP, GS308EP, GS308EPP LEDs	7
Switch label	8
Safety instructions and warnings	9
2. Install and Access the Switch in Your Network	12
Set up the switch in your network and power on the switch	13
Methods to discover or access the switch	13
Access the switch and discover the IP address of the switch	14
Access the switch from a Mac or Windows-based computer using the NETGEAR Switch Discovery Tool	14
Set up a fixed IP address for the switch	15
Set up a fixed IP address for the switch through a network connection	16
Set up a fixed IP address for the switch by connecting directly to the switch off-network	17
Change the language of the device UI	19
Change the switch password	19
Register the switch	20
3. Optimize the Switch Performance	21
Set the quality of service mode and port rate limits	22
Use port-based quality of service and set port priorities	22
Use 802.1P/DSCP quality of service	24
Manage broadcast filtering and set port storm control rate limits	25
Manage individual port settings	26
Set rate limits for a port	26
Set the priority for a port	27
Manage flow control for a port	28
Change the speed for a port or disable a port	29
Add or change the name label for a port	31
4. Use VLANS for Traffic Segmentation	32
VLAN overview	33
Activate the Basic Port-Based VLAN mode and assign VLANs	35
Manage advanced port-based VLANs	36
Activate the Advanced Port-Based VLAN Mode	36
Create an advanced port-based VLAN	37
Change an advanced port-based VLAN	38
Delete an advanced port-based VLAN	39
Manage basic 802.1Q VLANs	40
Activate the Basic 802.1Q VLAN mode	40
Create a basic 802.1Q VLAN and assign ports as members	41
Assign the port mode in a basic 802.1Q VLAN configuration	43
Change a basic 802.1Q VLAN	44
Delete a basic 802.1Q VLAN	45
Manage advanced 802.1Q VLANs	46
Activate the advanced 802.1Q VLAN mode	47
Create an advanced 802.1Q VLAN	48
Change an advanced 802.1Q VLAN	49
Specify a port PVID for an advanced 802.1Q VLAN	50
Set an existing advanced 802.1Q VLAN as the voice VLAN and adjust the CoS value	52
Change the OUI table for the voice VLAN	53
Delete an advanced 802.1Q VLAN	54
Deactivate a port-based or 802.1Q VLAN mode and delete all VLANs	55
5. Manage the Switch in Your Network	57
Manage NETGEAR Switch Discovery Protocol	58
Set up static link aggregation	58
Set up a link aggregation group	59
Make a link aggregation connection	60
Enable a link aggregation group	60
Manage multicast	61
Manage IGMP snooping	62
Enable a VLAN for IGMP snooping	62
Manage blocking of unknown multicast addresses	63
Manage IGMPv3 IP header validation	64
Set up a static router port for IGMP snooping	65
Change the IP address of the switch	66
Reenable the DHCP client of the switch	67
6. Maintain and Monitor the Switch	68
Manually check for new switch firmware and update the switch	69
Manage the configuration file	70
Back up the switch configuration	70
Restore the switch configuration	71
Return the switch to its factory default settings	72
Use the RESET button to reset the switch	72
Use the device UI to reset the switch	73
Control access to the device UI	73
Change or lift access restrictions to the switch	74
Manage the DoS prevention mode	75
Manage the power saving mode	76
Control the port LEDs	77
Change the switch device name	77
View system information	78
View switch connections	78
View the status of a port	79
PoE considerations for switches that support PoE	80
Manage the PoE ports	80
Display PoE port status	83
Power cycle the PoE ports	84
7. Diagnostics and Troubleshooting	86
Test cable connections	87
Resolve a subnet conflict to access the switch	87
PoE troubleshooting suggestions	88
A. Factory Default Settings and Technical Specifications	89
Factory default settings	90
Technical specifications	91
Model GS305EP and GS308EP technical specifications	91
Model GS305EPP and GS308EPP technical specifications	91
B. Additional Switch Discovery and Access Information	93

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Test cable connections

You can use the cable diagnostic feature to easily find out the health status of network

cables. If any problems exist, this feature helps quickly locate the point where the cabling

fails, allowing connectivity issues to be fixed much faster, potentially saving technicians

hours of troubleshooting.

If an error is detected, the distance at which the fault is detected is stated in meters.

(This is the distance from the port.)

To test cable connections:

Connect your computer to the same network as the switch.

You can use a WiFi or wired network connection, or connect directly to a switch that

is off-network using an Ethernet cable.

Launch a web browser.

In the address field of your web browser, enter the IP address of the switch.

The login window opens.

Enter the switch password.

The password is the one that you specified the first time that you logged in. The user

name and password are case-sensitive.

The Home page displays.

Select

Diagnostics > Cable Test

Select one or more ports to test the cable that is attached to the port.

Click the

button.

The switch tests the cable connection for the selected ports and displays the results.

This process might take up to a few minutes.

Click the

DONE

button to dismiss the test results.

You can run another cable test if desired.

Resolve a subnet conflict to access the switch

If you power on the switch before you connect it to a network that includes a DHCP

server, the switch uses its own default IP address of 192.168.0.239. This subnet might

User Manual

Diagnostics and

Troubleshooting

Gigabit Ethernet Plus Switches