:: It’s here! The CCIE LAB Image
A few days ago Peter Paluch posted a thread on Cisco Learning Network. He has created an OS image based on Debian that is used in the actual CCIE EI…
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:: It’s here! The CCIE LAB Image
IT Blog Awards Finalists 2020
:: The surprise of surprises Just on a random mid-week evening sitting at the diner table eating my home made hamburger. All of a sudden my twitter feed explodes. What!? Co-networker…
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IT Blog Awards Finalists 2020
SD-WAN :: Platinum Library
For the past few months I've been studying the SD-WAN course provided by Cisco. As a partner you can have access to a lot of course material at this moment.…
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SD-WAN :: Platinum Library
Network Fundamentals :: Etherchannels
EtherChannels AKA LAG, Port-channels, NIC teaming, etc Main goal is to improve bandwidth and forwarding capabilities.LAG hides each member from an upper layer protocol, in this case STP. Where STP…
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Network Fundamentals :: Etherchannels
Network Fundamentals :: The 802.1Q Packet
IEEE 802.1Q An additional of 32 bits are added to packet header consisting of: Tag protocol identifier (TPID): 16 bitsBelow are part of the TCI structure and is divided in…
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Network Fundamentals :: The 802.1Q Packet
SD-WAN :: Deploying the controllers
I've noticed that deploying SD-WAN controllers come with a special threatment. When working your way through it and deploying more config than needed could result in controllers not being added…
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SD-WAN :: Deploying the controllers
Nothing beats an “analog” book!
It finally arrived! After studying for a while with an ePub version of this book, it started to annoy me. The LED light propagated on my face all the time…
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Nothing beats an “analog” book!
Catalyst 6880-X :: oversubscription versus performance mode
The catalyst 6880-X has been here for a while now and has already been announced for End-of-Life in October 2019. Last day of support will be Oct 2025. Before that…
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Catalyst 6880-X :: oversubscription versus performance mode
Named VLAN Assignment :: The Alternative Way?
In Campus designs, where VLAN distribution is needed to provide enough IP space to the access-layer, bulk editing VLAN assignments to access-ports can be a troublesome job. Let's say you…
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Named VLAN Assignment :: The Alternative Way?
ISE 2.2 :: A Tale of Two Nodes
With a standalone deployment ISE handles functions like Administration, Monitoring and Policy Services. For redundancy purpose you can add another ISE node to your deployment to let it take over…
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ISE 2.2 :: A Tale of Two Nodes