Sunday, January 30, 2011

Just a note for later....

Forward metric....in regards to OSPF External Type 2 routes

Got hit with this in a lab scenario today...honestly didnt even know it existed until I did a show ip route on a specific entry.  I will do a lab this week with a bit more information, but it is definitely interesting.

Still labbing everyday for those listening in.  4-6 hrs per day/7days a week.  Still feel weak in some areas, and looking forward to Narbik in 2 weeks!

Saturday, January 22, 2011

Selective Packet Discard

Well I can officially add this hidden ios feature to my "bag of things I will probably not ever use in real life" tricks.  It actually serves a cool function to prioritize the "important" router traffic within the input queues on an interface.  Control plane traffic such as IP prec 6, IGP traffic, etc...can be placed in additional priority headrooms that will be serviced first over the regular input queue during times of congestion.  Here are some Cisco links on it:

Doc 1
Doc 2

Friday, January 14, 2011

INE

Well as I have mentioned before I purchased Internetwork Experts CCIE v4 self-study package....damn.  This is the most challenged...and humbled that I have been since beginning my Cisco certification/career journey several years ago.  I originally hit the labs pretty fast and furious, and have in the last week really talked myself into slowing down...and going via best practice of reading the lab...drawing the diagrams, and trying to really understand whats going on in the network that I am working on.  Sometimes this is a bit harder than it sounds, especially when you hit a level 9/10 lab, with multiple points of mutual redistribution, ipv6, multicast, rip, ospf, bgp, ospfv3, security, management, and qos....gets rough.  But tonight I have had some epiphanies..slowing down and nailing task after task.  I should keep it like this for a while...when the foundation is in tact I will work on speed. 

Thursday, January 6, 2011

Catalyst QoS

Well I am still here....chugging away with 30+ hours a week or so towards CCIE lab preparation. It IS hard work....I spent the last week going through the two preparatory Lab Books for Narbik's class that I am taking from micronicstraining.com in February. I am really looking forward to this! Since finishing those up though, I am back going through some INE Volume II labs. Did one on Tuesday...got killed with some Catalyst QoS stuff that I had never seen before, and some IP services items that I had just forgotten. I am going back through Vol I today on the portions where I was lacking. I was going to do a brief thing here on Cat QoS, but I found a blog article from the guys at INE that say it better than I ever could.

http://blog.ine.com/tag/per-vlan/