In the previous post, we looked at some of the challenges with L2-based networks. Now let’s start diving into what VXLAN is and what it can provide. First, let’s talk about overlays. Overlays Overlays are not new. We have had
Nasty Multicast VSS bug on Catalyst 4500-X
I ran into an “exciting” bug yesterday. It was seen in a 4500-X VSS pair running 3.7.0 code. When there has been a switchover meaning that the secondary switch became active, there’s a risk that information is not properly synced
Many to Many Multicast – PIM BiDir
Introduction This post will describe PIM Bidir, why it is needed and the design considerations for using PIM BiDir. This post is focused on technology overview and design and will not contain any actual configurations. Multicast Applications Multicast is a
IPv6 Multicast
These are my notes for IPv6 multicast for the CCDE exam. Overview Prefix FF::/8 reserved for multicast Multicast Listener Discovery (MLD) replaces IGMP MLD is part of ICMPv6 MLDv1 equivalent to IGMPv2 MLDv2 equivalent to IGMPv3 ASM, SSM and Bidir
HSRP AWARE PIM
In environments that require redundancy towards clients, HSRP will normally be running. HSRP is a proven protocol and it works but how do we handle when we have clients that need multicast? What triggers multicast to converge when the Active
The Tale of the Mysterious PIM Prune
Christmas is lurking around the corner and in the spirit of Denise “Fish” Fishburne, I give you the “The Tale of the Mysterious PIM Prune”. I have been working a lot with multicast lately which is also why I’ve blogged
Lessons Learned from Deploying Multicast
Lately I have been working a lot with multicast, which is fun and challenging! Even if you have a good understanding of multicast unless you work on it a lot there may be some concepts that fall out of memory
Potential Issues with Multicast within a VLAN Spanning Switches
Background I ran into an interesting issue yesterday at work. There is a new video system being installed, which takes the video output from computers, encodes it and sends it as multicast to a controller. The controller then displays it
INE 10 day bootcamp – Review
I’m back from London and it’s been a great experience. Many readers are interested in what the bootcamp is like. It is a big investment to go for so it is understandable that you want to know if it will
More on SSM
As you’ve noticed I’ve been studying SSM and what better way to learn than to blog about it. I recently got a Safari subscription which has been great so far. I’ve been reading some in the book Interdomain Multicast Routing: