By LBSources, on August 21st, 2010 In my last Interesting Packets post I linked you to an excellent TSHOOT post from @showlette describing and providing his TSHOOT Dynamips/GNS3 setup. Over a week later he nailed it and has successfully passed the TSHOOT exam – Go give him warm congrats as well as snag his setup if you’re working on the TSHOOT or if you just need general a troubleshooting lab environment. Congrats dude!
Speaking of TSHOOT – Did you sign up for the Free TSHOOT webinar from @PearsonITCert?
Pearson IT Certification presents our Webcast series where our authors connect with you via the web for live . . . → Read More: Interesting Packets On The Web – 8/21/2010
By LBSources, on August 19th, 2010 OK – So here we go! The advanced Spanning Tree Protocol. Initially it was kind of simple to keep everything in line – Portfast, Uplinkfast, Backbonefast and it was clear and then came the chaos! BPDU Guard, Root Guard, Loop Guard, BPDU Filtering – and so on. But I held on in there and I think I’ve got the best out of the reading I could for now.
The hardest part of this chapter was the whole RSTP, PVST, PVST+ & RPVST+ business – I mean what the heck. I’ll surely have to go over these again and put together . . . → Read More: SWITCH Study Notes – Advanced Spanning Tree Protocol & Etherchannel
By LBSources, on August 11th, 2010 Warning – This topic I’m sure has been covered more then a few million times
So today I was called on after one of the guys on the team couldnt get external RDP access to an internal host working for a user. I logged onto the ASA and did the normal “show run” and at first even I was even fooled. Mainly because I manage most of my host naming using” names”
name 10.1.31.26 hosta_int name 172.32.3.3 hostb_ext
Skimming quickly through the config didn’t help, so I removed names, slowed down and began looking again. I was looking at . . . → Read More: ASA Static NAT & ACL Configuration Confusion
By LBSources, on August 10th, 2010 Yesterday it seems that @DNSMadeEasy the service with the untouchable IP Anycast network sent customers an email of apology in regards to the most recent DDoS attack they suffered Saturday (8/7/2010). The attack came from a 50GB strong bot-net from China that flooded their core networks and caused several DNSMadeEasy clusters to come to a total halt. As they explain it in their email, some regions / customers did not experience any outages. They worked with their upstream providers to implement a combination of null routing and other tactics to outwit the vicious attackers. DNSMadeEasy plans to issue an unrequested . . . → Read More: Interesting Packets On The Web – 8/10/2010
By LBSources, on August 9th, 2010 Below are notes from the Spanning Tree basics chapter. Maybe it's just me but STP seems just as troublesome as it is useful. The advanced chapter didnt seem to let up at all, I still felt like there was a lot to digest. Luckily enough though I was able to move on without any "huh?" moments. But I never feel comfortable with just that – My feeling (with Cisco/networking/IT stuff) is that I've never really learned something until I've planned, implemented and debugged it several times – I think we all feel this way.
As I said I'm catching up . . . → Read More: SWITCH Study Notes – Spanning Tree Protocol Basics STP
By LBSources, on August 5th, 2010 So I'm sorry to be spamming notes here right now – but I'm just trying to create a footprint and maybe help someone else out down the line. The other thing is this phase of studies is like reading the manual before you get to play with something – hmmm, wait I never read the manual! Well we certainly cant do that with these exams though!
In other words, I hope to have some nice topics up once I begin review, labbing and quizzing. Hopefully I'll run into some things that I just wont understand and you guys could . . . → Read More: SWITCH Study Notes – VLAN Trunking Protocol (VTP)
By LBSources, on August 3rd, 2010 Some more notes! From chapter two of Chris Bryant's (@ccie12933) BCMSN study guide and some of my own blending
Why We Create VLANs
The most common reason for creating VLANs: Prevent the excess traffic caused by a switch's default behavior when it receives a broadcast. If you have a network segment with hosts whose very existence should not be known by the rest of the network, just put these hosts into their own VLAN. A switch that receives a broadcast will forward it out every other port on the switch except the one that it was originally received on. A . . . → Read More: SWITCH Study Notes – Virtual LANs (VLANs)
By LBSources, on August 2nd, 2010 Here are my notes from chapter one of Chris Bryant's (@ccie12933) BCMSN study guide and some of my own blending. I'm kind of breezing through much of the material not spending too much time, but just getting familiar with the general concepts again. It's been a long time since working with switching – about 3 years exactly! I more involved at layer 3.
So if the notes seem a bit "light", take these as primer notes. I don't want to spend too much time here when I've got real SWITCH reading soon. I know, you're asking "why the hell waste . . . → Read More: SWITCH Study Notes – Basic Switch Operation & Configuration
By LBSources, on August 1st, 2010 Hey, so lots of great news in the Tweep and blogger community for those who beat the deadline of the old CCNP (BSCI, BCMSN, ONT and ISCW) exams that hit it’s payload today. Yesterday was your last chance to take these exams – if you missed them, you got to take the new CCNP track exams.
Congrats to: @TheParadiso, @aconaway, @ewiss, @Routemyworld, @bdwill, @nemisisgy, @lynxbat and Rofi Neron – Hope I didn’t miss anyone?
Oh! And my good buddy @jlgaddis !!
I also beat the deadline for the BSCI exam and it’s the only exam I have so far . . . → Read More: SWITCH Plans – CCNP Passes!
By LBSources, on July 31st, 2010
So I guess it’s customary to use that as the opening introduction to your blog right? Maybe too cliche or corny? It’s like we all use it anywhere we’ve got to put some kind of sample text.. Eh – No big deal
OK – so here it is! My blog… Not exactly sure how this will turn out – But I’ll explain the reasons and the meaning of the domain name and idea behind it.
Why I’m starting blog?
Well, one thing I noticed pretty quickly when I started studying is the use of online blogs and . . . → Read More: Hello World!
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