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Switches / Hubs

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer o...

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Network and Security Engineer

A network security and systems engineer with over 12 years of experience in the field, ready to help and share my knowledge with others.

Troubleshooting Solution

VLAN segmentation

We are a manufacturer, so we have PLCs that do much multicasting.  Sometimes a PLC message doesn't …

Port configurations on Cisco Catalyst switches

I see many questions here on Experts Exchange regarding switch port configurations and trunks. This …
Troubleshooting Solution

How to add another VLAN to a Cisco Router

Hi -

I have three stacked C3750E core L3 switches, that connect to some stacked L2 cisco switches …
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Cisco Switch Interface has orange light - inbound access list is not set cisco switch

Hi - I have a Cisco WS-C2960S-48TS-L and I am trying to connect a device to a Gi interface port. The …
Flash Dir Head

Deleting the VTP Configuration From a Cisco Switch

WARNING:  If you follow the instructions here, you will wipe out your VTP and VLAN configurations.

Troubleshooting Solution

Cisco Switch Trunk Port Not Working

I am working on a Cisco 3750G Stacked switch and I can't seem to get the trunking working on my …
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Factory reset Cisco 4500X switch

This is a switch that came from a dissolved portion of the company.  It was setup with Radius …
Troubleshooting Solution

Issues getting VLANs out of "Shutdown" on Cisco 4500x switch

I just booted up a 4500x brand new and dropped a config on it.  All VLANs are showing "Shutdown" …
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How to Locate TP Link Switches on a LAN Network

Running a TP Link switch and the IP address is not showing up on a local network scan. Does TP Link …
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Cannot connect Cisco 4500X and Cisco 2960 using 10gb SFPs

HELP!!  I cannot get these 2 switches to connect.

I have a Cisco 4500x with a 10gb LRM SFP in …
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Cisco UCS Blades vs Dell or HP Blades

If I understand Cisco UCS blades are enclosed in a Chassis, the Chassis is connected to Fabric …
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How to configure a new subnet on a cisco switch

Hello -

I have 4 switched stacked WS-C2960S-48FPS-L and I am needing to setup a new IP address range …
Troubleshooting Solution

Sometimes no DHCP reply > switch problem ?


Weird problem here ... some of my machines, at times, don't immediately get an IP address …
Troubleshooting Solution

What are these switches?Hello

Hi - I did a show hardware on a cisco switch and wondering what these switches are.

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VLAN setup on a Netgear L2 Switch

I am trying to setup a VLAN on a Netgear  Smart Managed Pro Switch (GS728TPPv2) 
The sole …
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I would like to connect to Buildings over Cat6

I would like to connect to buildings over Cat6. These buildings are 200meters away! I dont now about…
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How it needs to plug server with 10 Gb ports to a switch?


I have a Dell server with 10 GB ports and I need to plug it to switch.

What confuse me is what …
Troubleshooting Solution

Isolated VLANs on Dell switch

Hi, I have a switch that we use for machines on our DMZ.

I want to have each virtual machine in an …
Opinion Solution

Is it possible to connect a USB 3.0 drive to a network?

I purchased a PoE switch. It had only ethernet ports. I tried using an Ethernet to USB cable …
Troubleshooting Solution

host flapping between ports

I have this error message on one of my swiches, sw32.  Not sure what  or how a host can flap between …

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