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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 Architect and EE TA

Over 15 years' experience in enterprise network design and implementation focused on routing, switching, Wi-Fi and Cisco ISE.

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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 …
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Sometimes no DHCP reply > switch problem ?


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

Connect client computers to T1 router

I have a T1 line installed that runs into a Cisco 1840 router.  I have only one static IP address …
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SFP+ help - first time


So the HP DL380 G10 server I recently purchased apparently came with a 562FLR-SFP+ 10GB adapter. To

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data vlan setup


We will be required to setup vlans on our LAN and WAN very soon..

Looking at the help file…
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switch vlan mismatch

I'm getting these errors, and I kind of understand why, but  I guess I might need some help in …
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Dynamic Routing Implementation

Hello  Experts,
The below diagram shows  our network between Building A and Building B connected …
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Network Design for Guest Internet Access

Hello Experts

We are planning to deploy  Wireless Internet Access throughout campus. The campus …
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Designing Network with Cisco ASA and TMG for Internet Traffic

Hello Experts,

I am designing a network for a customer Please see the below diagram.

The …
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A new vLan on cisco 2960

I have just made a new vLan 2 on my switch cisco 2960, assigned port 'interface gig 0/23', …
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Routing multiple vlans across multiple switches.

I had issues routing voice traffic across two same make/model switches, one as a core and the …
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I have created two VLAN in my switch as follows. I am unable to communicate from VLAN20 to VLAN30. I…
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HP Pro Curve 2810 not picking up IP address from DHCP Server

I am migrating a Cisco 2950 switch to HP Pro Curve 2810 switch, On Cisco 2950 switch there are 2 …
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Cisco DNA Center configure Backup


In Cisco DNA Center Backup & Restore

I need to configure a backup server to back up the DNA server in

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Ive installed SDM on my local pc.  I have a console cable connected to my router.  I wish to use SDM…
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VLAN Access Security

Hello Experts,
We have more than 50 VLANS configured in our Cisco network. I want to implement a …
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.

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Very weird DHCP problem ... switch related?

So I've got the following, weird problem:

A bunch of workstations and servers are connected to a …
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network bandwidth issue between my actual 2950

Dear Experts,

I need help in order to troubleshoot a network bandwidth issue between my actual …

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