My last blog post for 2011! Past days I’ve been playing games mostly, and reading some CCDA stuff. No labs for the weeks to come, I have to redesign my home lab first and integrate the access server.
I did still learn some small things this week:
- A Cisco device without ‘ip routing’ enabled (like an unconfigured layer 3 switch) needs the command ‘ip default-gateway’ to be reachable from another subnet. But once ‘ip routing’ is enabled, this command no longer works, and it needs a default route for similar behavior.
- Cisco PoE endspan devices (PoE capable switches) use PoE mode A, while midspan devices (PoE injectors) use PoE mode B.
- I learned what SSL offloading is, and that it can be used together with an IDS/IPS for improved security.
- 10 Gigabit Ethernet requires Cat6A UTP, and runs up to 100m. For 40 and 100 Gigabit there’s no cabling standard as far as I know.
Well, that’s it. Happy holidays to everybody!
Reggle 
Playing games?! 😉
Interesting tip on the 10gig cabling requirement by the way, that’s new to me. So you’re saying 10gig won’t run on standard cat5e?
It might, just like I was able to get a full 100 Mbps on a Cat 3 cable once. But that was only 20 meters, not the full 100, and it’s not certified for it. Meaning that if you need 10Gbps it’s best to use the official cabling, as this means you’ve done your job correctly 😉