Category Archives: Networking

Demystifying BGP Synchronization

BGP synchronization is not commonly used today, however still part of the Cisco CCIE certification and must be understood by all candidates trying to obtain the certification. Further there may be some rare cases where this feature is still needed. Reading through literature, I found different definitions of how BGP synchronization works, especially when it… Read More »

Understanding IP Proxy ARP

One of the somewhat confusing protocols in Layer 2 networking is Proxy ARP. Probably most of you already know how ARP works. In this post I will explain the principles behind Proxy ARP, and have a short look at the benefits and drawbacks. ARP Basics The Address Resolution Protocol is responsible to find the MAC… Read More »

Cisco ASA Management access from VPN

During my study for the Cisco FIREWALL v2.0 exam I came across an issue today. I am connecting to our lab via a Cisco firewall via IPSec VPN. However, I had to modify the ASA’s config from this remote session. The question now was, how to allow remote management from the VPN pool. The topology… Read More »