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…
TTL (or Time To Live) is a Layer-3 loop prevention mechanism. Every time a packet passes a Layer-3 hop, the TTL decrements with 1. Packets with a TTL of 0…
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…
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…
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…
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…
:: Historical Since AirOS 4.2 there is an option available in Cisco's WLAN controllers called Peer to Peer blocking. Previously a more lightweight version was presented to push all ARP…
:: Partner delivered Cisco Partners can host en sell their own SD-WAN infrastructure to customers as part of value added service. By utilizing their own compute environment they can host…
One of the choices customers who are considering Cisco's SD-WAN as their WAN solution have is hosting the SD-WAN Controller and vMANAGE in their Public Cloud Solution.Some features are described…
Abstract Learning for SD-WAN, complementary to my current CCIE "Closing the gaps to the Lab" study I try to force myself to lookup every protocol or application that is part…