Hi all - I was helping connect another building and this involved two links that serve different vlans. The links are on one switch not owned by us (Cisco) from our main IT group and then ours ...

I've got a customer with a Dell switch (power connect 6248 I think) with 3 uplinks to my network. The uplinks are separate layer 3 links, each one being a separate IP block in a separate VLAN on my ...

Ethernet devices running the Spanning Tree Protocol (STP) have been implemented in networks since the early 1990s. Many organizations take STP for granted and do not configure it per industry best ...

Those who had an opinion last week were split evenly: CCNA labs need either 2 or 3 switches, and CCNP labs need either 3 or 4. But why? We saw a few opinions floating around the blog last week, but ...

Our project intends to evaluate and compare the performances of STP and RSTP on Cisco switches supported by OPNET. We were planning to do the comparison of STP with more other types such as Multiple ...

Setting up virtual local area networks or VLANs in your home network or home lab makes management of your network easier. You can use one as a guest network to share your internet connection with ...

Joel is an internationally recognized expert in the areas of security, networking and messaging. Follow him on X (formerly Twitter) @joelsnyder. Building enterprise networks with routers and switches ...