Cisco OTV Implementation & Troubleshooting (Legacy Multicast Mode)

For the details on what Overlay Transport Virtualization (OTV) is and how it works on a high-level, see my previous blog … [Read more...]

Book Review: A Primer of Multicast Routing

I was recently in need of a refresher on multicast routing, so I picked up Eric Rosenberg's A Primer of Multicast Routing … [Read more...]

How to Turn Your IOS Router Into a Pr0n Server (Pr0n Not Included)

No, really! Did you know that your IOS-based router is capable as acting as a static webserver? Below you will find the … [Read more...]

Machine Fragile: More Thoughts

I just ran across a pointer to this research on Bruce Schneier's blog: Networking system components that are well-behaved in … [Read more...]

Machine Fragile

Yesterday, a “breaking news” tweet at 1:07 PM EDT from the Associated Press reported that two explosions had occurred at … [Read more...]

Using IP SLA Delay Feature to Safely Monitor Lossy Links

cgaller_ip_sla1

IP SLA is a great feature if you want to add some automation and intelligence into the network. SLA is no SDN/OpenFlow, but … [Read more...]

Thoughts on Open EIGRP

I've been in a hole working on a lot of other projects for a few months (hence my lack of posts!), but not so deep as to not … [Read more...]

Why Is Cisco Bothering With “Open” EIGRP?

My first taste of networking came via the Cisco Learning Academy. I did my CCNA and the old school ROUTE, and it did a pretty … [Read more...]

Multicasting Apple’s Bonjour Protocol

Let's face it. Apple's Bonjour protocol is likely here to stay, or at-least for the foreseeable future until Apple decides … [Read more...]

Howdy Mr. Neighbor Router: OSPF Adjacency vs. Neighborship

Topology

OSPF-Hello (224.0.0.5) to all the network aficionados on the web. This will be my first article on Packet Pushers. Routing … [Read more...]

No, Not That Kind of Model!

We're not selling clothes, after all. Ivan and I have been tossing emails back and forth about Openflow over the last week … [Read more...]

Overview of the Cisco 887VA Router & Its USB

Plugging in a Toshiba 16Gb thumb drive

As I have mentioned before, I have been working on a network redesign for a non-profit organization, with an aim of deploying … [Read more...]

July 2012 IETF Update

The IETF is on my mind this week (for pretty obvious reasons). If anyone is in Vancouver, and would like to meet up, send me … [Read more...]

JUNOS Logical-System: A Great Way to Learn Junos & Prepare for Certification

LR_packet_1

Want to start learning Junos? Want to start working on a Juniper certification? Is there a simulator available? What if you … [Read more...]