VLAN segmentation
We are a manufacturer, so we have PLCs that do much multicasting. Sometimes a PLC message doesn't …
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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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Article
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 ?
Hi,
Weird problem here ... some of my machines, at times, don't immediately get an IP address …
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
Hi
We will be required to setup vlans on our LAN and WAN very soon..
Looking at the help file…
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 …
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 …
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 …
I am designing a network for a customer Please see the below diagram.
The …
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A new vLan on cisco 2960
Hi,
I have just made a new vLan 2 on my switch cisco 2960, assigned port 'interface gig 0/23', …
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.
Hi
I had issues routing voice traffic across two same make/model switches, one as a core and the …
I had issues routing voice traffic across two same make/model switches, one as a core and the …
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VLAN
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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SDM & HTTP/S
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 …
We have more than 50 VLANS configured in our Cisco network. I want to implement a …
Article
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 …
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 …
I need help in order to troubleshoot a network bandwidth issue between my actual …
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Switches / HubsBack to the top
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 of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.