Nexus Two Way vPC Good to Know
The Scenario Quick overview of topology, two Nexus 7000s and two Nexus 5020s each with two 10Gig connections to each other. In other words, there’s a total of 40Gig between each switch, and they’re...[[ Summary content only, you can read everything now, just visit the site for full story ]]
EIGRP Route Filtering with NX-OS
Overview So we all know how to filter EIGRP routes; right? create a prefix-list or access-list then apply that to the routing process. You can also do offset-lists, all that good stuff. This is...[[ Summary content only, you can read everything now, just visit the site for full story ]]
{LISP} IPv6 over IPv4 Transition
First an foremost, I want to thank Ivan Pepelnjak of ipspace.net for taking the time to read, correct and validate these concepts. Taking time out of his busy schedule to make sure this information...[[ Summary content only, you can read everything now, just visit the site for full story ]]
IPv6 over an IPv4 Internet Using DMVPN
Well this one really doesn’t need much of an explanation anymore, IPv6 is here and IPv4 has been here for a long time. In most networks, the two must co-exist side by side or one on top of the other...[[ Summary content only, you can read everything now, just visit the site for full story ]]
Routing an IPv6 Core on Link-Local Addresses
Can routing an IPv6 Core on link-local addresses be done? Will IPv6 work in a network backbone that only has link-local addresses configured? For this test I’ll be using OSPFv3 but protocol itself...[[ Summary content only, you can read everything now, just visit the site for full story ]]
Common Services VRF MPLS and BGP
One of the most common MPLS VPN topologies is the Common Services simply put, it provides the most control of Branch traffic and filtering. MPLS VPNs are among one of today’s favorite and for good...[[ Summary content only, you can read everything now, just visit the site for full story ]]
The OSPFv2 Network Summary LSA Type-3
Well, what is the Network Summary LSA? It’s an LSA flooded throughout the backbone area, which describes networks in other areas. Originated only by ABRs (Area Border Routers) and not flooded...[[ Summary content only, you can read everything now, just visit the site for full story ]]
Troubleshooting OSPFv2 Neighbors (Part2)
This will seem very similar to t he last post, again going on simple. Things that can be overlooked if one is not careful, doesn’t look at everything with a magnifying glass, and becomes over...[[ Summary content only, you can read everything now, just visit the site for full story ]]
vPC and VSS features and Comparison
Seems like other than IPv6 allot of the talk lately (in the Datacenter anyways) is about MEC, or multi-chassis etherchannel. Using something like this in the aggregation part of the Datacenter not...[[ Summary content only, you can read everything now, just visit the site for full story ]]
Troubleshooting OSPFv2 Neighbors (Part 1)
Tackling one of the simplest OSPFv2 adjacency problems to the trained eye. Yet, it’s really incredible how often it can escape even the most seasoned veteran. Getting right to the point,...[[ Summary content only, you can read everything now, just visit the site for full story ]]
IS-IS Single-Topology vs Multi-Topology
Today I’m covering a little topic that seems to trouble some people. Mainly because IS-IS is really only used in provider environments, but I happen to like it. It’s a fairly stable...[[ Summary content only, you can read everything now, just visit the site for full story ]]