You are currently browsing the Should Have Gone With Cisco weblog archives for August, 2007.
August 15, 2007 by ted.
I came across this article on Cisco’s site:
http://www.cisco.com/warp/public/105/pmtud_ipfrag.html
It’s a great read, and covers a lot of information that will help you minimize fragmentation issues across your network. It’s great for understanding when routers fragment packets and how to configure Path-MTU-Discovery. It’s also helpful if you have GRE or IPsec tunnels in your network.
One thing that stands out is to remember that Path-MTU-Discovery relies heavily on certain ICMP messages. Routers reply with “fragmentation needed and DF set” and you won’t hear about it if your firewall is blocking ICMP.
Posted in Routing&Switching, Cisco | Print | No Comments »
August 7, 2007 by ted.
After recently teaching the latest CCNP exam changes, I figured everyone could benefit in knowing any new hardware requirements. The CCNP program has changed quite a bit from the previous tests. I have taken both the old and new tests and can attest to the fact that the new CCNP changes are great. For the first part of this series, I will focus on the BCMSN (aka switching) changes. For the most part, the core competencies for this haven’t changed much at all.
Take a look at the exam objectives here
Posted in Certification, Cisco | Print | 4 Comments »