Cisco NAT Cheat Sheet
I’ve always had a difficult time when attempting to remember how to implement the different types of NAT available on ASA and IOS devices. It doesn’t help that between the two device families, there are…
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CDP on an ASA (To Some Extent)
If you have been in the Cisco networking world for any length of time then you have probably used CDP (Cisco Discovery Protocol) or LLDP (Link Layer Discovery Protocol) at least once or twice to…
SDN – Is Software Fast Enough
During a VMWare NSX training class a while back, a question was raised to the instructor concerning the throughput that is possible on a NSX distributed switch or router (two components that are crucial to…
ASA Dual ISP
When it comes to internet redundancy, the Cisco ASA family of firewalls can be very flexible in how they can be configured to provide that highly available connection. You can even host highly available internet-facing…
VRF-Lite, MPLS, and Null Routing
In the field of IP routing, the practice of using null routes (A.K.A. “Black-Hole Routes”) has always had a place. Null routes are often used for DOS mitigation, loop prevention, routing stability, and route summarization….