CCNA Module 1 Lesson 6 STP & RSTP
Posted in CCNA, CCNA General, VLANs on Oct 20th, 2009
Here is the latest (and previous) lessons of our upcoming CCNA course. Enjoy!... [Read the rest of this entry -->]
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Archive for the 'Cisco Technology' Category
IPv6 Transition Mechanisms Part 5: NAT-PT
Posted in CCIE R&S, CCIE R&S Written, IPv6, IPv6 Written on Oct 18th, 2009
It is time now for us to wrap up this series on IPv6 transition techniques (in the scope of the R&S CCIE Written and Lab exam). For this final part, we turn to an existing blog post from our own resident genius, Petr Lapukhov. I edited his post to ensure we mere mortals could understand it. [Read the rest of this entry -->]
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IPv6 Transition Mechanisms Part 4: ISATAP Tunnels
Posted in CCIE R&S, CCIE R&S Written, IPv6, IPv6 Written on Oct 17th, 2009
For those of you that have been following the previous parts of this blog series (they are located in the IPv6 subcategory of the CCIE R&S category to the left), get ready for a major paradigm shift. So far, we have been experimenting with transition techniques (tunnels) that have focused on connecting remote “island” networks of IPv6 over an IPv4-only infrastructure. Now we are going to discuss a mechanism that was designed to help IPv4-only hosts communicate to other native IPv6 devices.... [Read the rest of this entry -->]
Accessing the Firewall
Posted in CCIE Security, PIX/ASA Firewall, Uncategorized on Sep 25th, 2009
After returning from vacation, Bob (the optimistic firewall technician) decided that he wanted to take some time and get a little bit more familiar with firewall configuration. He was able to get permission to use some spare equipment for practice.... [Read the rest of this entry -->]
CCNA Module 1 Lesson 5 VTP
Posted in CCNA, CCNA General, VLANs on Sep 24th, 2009
Here is the latest (and previous) lessons of our upcoming CCNA course. Enjoy!... [Read the rest of this entry -->]
IPv6 Multicast – Part 1 – Addressing and MLD
Posted in CCIE R&S, CCIE R&S Written, IPv6, IPv6 Written on Sep 19th, 2009
Join Anthony Sequeira and Keith Barker as they cover IPv6 Multicast Part 1 in the Advanced Technologies Class on Demand – 10-Day. This is a key new topic found in the version 4.0 CCIE R&S blueprint.... [Read the rest of this entry -->]
This is the follow up discussion for the post titled, “Have you seen my Router ID?”... [Read the rest of this entry -->]
In yesterday’s post, titled “Have you seen my Router ID?”, a challenge section was provided. This post will focus on scrutinizing the section itself, from a strategy / analysis point of view.... [Read the rest of this entry -->]
There is more than one possible solution for this challenge. Feel free to post your proposed answer in the comments section. We will try to keep comments hidden from public view, so that the fun isn’t spoiled for others. Also, don’t feel bad if the answer(s) aren’t immediately apparent. A number of very bright people have been puzzled by this scenario. Answers will be posted on Friday, September 18th.... [Read the rest of this entry -->]
The feature we are going to talk about today may look a bit convoluted, but it demonstrates core OSPF behavior: combining link-state and distance-vector behaviors. The command capability transit was introduced in IOS 12.3T and is on by default. However, the description is rather confusing and does not explain the underlying mechanics. We are going to give an in-depth look at this feature now.... [Read the rest of this entry -->]
How quickly can you troubleshoot an ASA configuration?
Posted in CCENT, CCIE Security, Network Security, PIX/ASA Firewall on Sep 14th, 2009
It was a dark, cold night in late December, and Bob, (the optimistic firewall technician), had a single ASA to deploy before going home for the holidays. The requirements for the firewall were simple. Bob read them slowly as follows:... [Read the rest of this entry -->]