Trunk to Access – Will It Work?
Recently a posted a question to Twitter about connecting two Cisco Catalyst switches. One switch has already booted and has […]
Catalyst, Spanning tree, Switching
Job related
How to Interview a Network Engineer Using a Single Scenario
Most organizations are terribly bad at interviewing people. They overcomplicate things by holding too many interviews (more than 2-3) and
Nick Russo
SPCOR Exam Experience by Nick Russo
On 31 October 2023, I took and passed the Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) exam
Nick Russo
DCAUTO Exam Experience by Nick Russo
On 17 October 2023, I took and passed the Automating and Programming Cisco Data Center Solutions (DCAUTO) exam on my
VXLAN
Forwarding BUM Frames in VXLAN Network With Static Ingress Replication
In the last post we used multicast to forward BUM frames. In this post, static ingress replication is used which
VXLAN
Forwarding BUM Frames in VXLAN Network With Multicast in Underlay
There are two main methods that can be used to forward broadcast, unknown unicast, and multicast (BUM) frames in a
BGP
Path Hunting in BGP
BGP is a path vector protocol. This is similar to distance vector protocols such as RIP. Protocols like these, as
BGP, OSPF
Valley-free Routing in Leaf and Spine Topology
Valley-free routing is a concept that may not be well known but that is relevant to datacenter design. In this
NX-OS
Nexus9000v and “Missing” Routes
I have built my lab for VXLAN on the Nexus9300v platform. Since I have a leaf and spine topology, there
BGP, OSPF
Is One Protocol Simpler Than Two?
I’ve been in a lot of interesting discussions the last couple of days on what protocol to use for the