ASA Clustering Multiple Context Transparent Mode

Some quick template-style notes on deploying clustered ASAs running multiple context mode with transparent contexts. There are some well-documented guides and a few blog posts out there already detailing clustering and transparent-mode firewalls. The purpose of this post is just to dive in to configuration. You may run into some caveats depending on which feature you want to run simultaneously, please refer to the ASA General Operations CLI guide for particulars before deploying clustering. (more…)

OTV for Secured / Firewalled Networks – A Design Consideration

My colleague at ( and I recently came across a design limitation, or “opportunity,” with OTV and firewalls.  The plan was to take a current environment with Layer 3 gateways on a firewall, and OTV those networks across multiple Data Center.  A simplified topology would look like this: (more…)