Ethernet History Deepdive – Why Do We Have Different Frame Types?
In my previous post Encapsulation of PDUs On Trunk Ports, I showed what happens to PDUs when you change the […]
Ethernet
Ethernet
Ethernet
Some History on VLAN 1 in Cisco Switches
Over the years, there has been a lot of discussion on if VLAN 1 in Cisco switches is special or
Ethernet
802.1Q-Tagged Frames Through Unmanaged Switch – Forwarded or Dropped?
As a follow-up to the post yesterday on native VLANs, there was a question on what would happen to 802.1Q-tagged
Ethernet
1000BASE-T Part 4 – Link Down Detection
In the previous three parts, we learned about all the interesting things that go on in the PHY with scrambling,
Ethernet
1000BASE-T Part 2 – Deepdive
In 1000BASE-T Part 1, we reviewed the layers and what their purpose is. Now we’re going to go much deeper
Ethernet
1000BASE-T Part 1 – Introduction
How does Ethernet detect that a link goes down? This, what I thought was a simple question, I asked myself
Convergence, Ethernet, Spanning tree, Switching
Ethernet, STP, Topology change and the behaviour of Ethernet
Introduction This post is inspired by a post at IEOC about Uplinkfast and TCN which can be found here. Before
Convergence, Ethernet
Detecting Network Failure
Introduction In todays networks, reliability is critical. Reliability needs to be high and convergence needs to be fast. There are
CCIE, Ethernet
The history of Ethernet – DIX vs 802.3
I’m planning to do a post on BPDUs sent by Cisco switches and analyze why they are sent. To fully
CCIE, Ethernet, Notes
Ethernet – notes
RJ 45 pinouts 10-BASE-T and 100BASE-TX uses pairs two and three, gigabit Ethernet uses all four pairs. Pinout for straight