Sometimes when we purchase a L2 service from a service provider, we need to have our L2 protocols tunneled.
ASR920 platform gives the operator three option to choose from:
l2protocol tunnell2protool peerl2protocol forwardAlthough I've been working with ASR920s for a while, I didn't have the time to …
more ...I write this post as I go through Route Target Constraint (RFC 4364) feature. I'll try to answer below questions:
Before looking into the feature, let's think for a moment how typical network involving route …
more ...Here are my notes about how IS-IS deals with authentication. I'll be working on a simple network consisting of IOS XE, IOS XR and Junos based routers.
Here is reference diagram:
First, I'll start off by verifying IS-IS adjacencies on R6.
R6#sh isis neighbors
Tag 1 …Recently a friend of mine asked a question which can be summarized as
does the Route Distinguisher of Route Target play any role in BGP best path selection in MPLS BGP VPNs?
I'll try to answer this question based on the following scenario:
We have two PE routers running IOS …
This is one of the oldest methods of implementing multicast in Service Providers core. Quite popular, but unfortunately has some serious limitations.
We will see the operation of Draft-Rosen deployment model in practice by building sample lab topology and looking how particular pieces of technology fit together. Let’s look …
more ...The shortest statement describing PIM-DM behavior is "flood and prune". We assume that every host on every network segment wants multicast traffic. Later routers can signal that they aren't interested anymore in receiving particular multicast group.
High level overview of PIM-DM operation is as follows: