Sorry, this entry is only available in Portugues.

Sorry, this entry is only available in Portugues.

Sorry, this entry is only available in Portugues.

Sorry, this entry is only available in Portugues.

Sorry, this entry is only available in Portugues.

Hello Guys,

Throughout the week, looking to expand the horizons of the blog, I discovered a tool to achieve semi-automatic translation of the blog into English.
I thought this initiative a good time, but never had time to implement it due to my dedication to the Full-time studies.

Now, the blog also has an English title.

Cisco CCNA || Study Guide

A big hug,
Maurício.

Hello Guys,

Throughout my studies for the CCNA certification, I had many facilities for the practical part. How did the current Cisco Netacad 2002 to 2004 with very good teachers could do much any kind of configuration, troubleshooting and more. All with actual devices.

What I see in some studies of routes for people to study by itself is a lack of practice in the intermediate period of study. In my view, this happens because of the difficulty in setting up scenarios and create from scratch.

In this post, I offer you a ‘package’ laboratories to the Packet Tracer which addresses various concepts by means of various topologies. But best of all is that the laboratory has already guide their goals through the configuration and / or troubleshooting.When you finish setting click Check Results to see the score and get a feedback from your configuration.

Below is the screen of the topology and order.

This package has several laboratories, but those used by me are available on the first link, the folder PT3.2Saves. In the second link, other laboratories are available. Some, besides having the basic file containing the answers made by me.

The file that has all the step by step to open is what is the extent PKA.

Follow the links to download:

Package of Step-by-step Labs for CCNA PT3.2Saves

Package of Step-by-step Labs for CCNA Others

Any questions please contact us.

A big hug and success to all!

Maurício Bentow Ghem.

Hello Guys,
I did this summary on the most important of IPv6 to be didactic, comprehensive and objective. The level of coverage of this summary would be midway between BSCI and CCNA certifications. Below.

IPv6

- We added several features compared to IPv4, such as 128 bits for addressing (IPv4 only 32), security (through extension headers), techniques to transition from IPv4 to IPv6, QOS embebbed (direct the header), Autoconfiguration ( allows a host to obtain an IP address without having to run DHCP on the network) and IP mobility.
- The IPv6 address has 128 bits and is divided into 8 ’sextet’, each with 16 bits.
- The Header (including the source and destination IP) has 320 bits, without the extensions - below.

- IPv6 does not have the checksum field (and not the place), considering that the control of errors of lower layers is reliable.
- IPv6 USA not broadcast, but multicasting. A broadcast can be simulated by sending a multicast address to the All-nodes, link-local scope (FF02:: 1).
- Loopback Address -:: 1 / 128 (IPv4 = 127.0.0.1). Address default-route -: 0 / 0 (IPv4 = 0.0.0.0 / 0).
- EUI-64: format derived from the MAC-address used to assign addresses Link-Local. You get the MAC address (48 bits), the hexadecimal number FFFE inserted in the middle of it and changed the first 2 bits (from 00 to 20), so the MAC 00eb.1234.3322 in EUI-64 format would be: 02eb: 12ff: fe34: 3322. Finally, adding the prefix for link-local addresses would: FE80:: 02eb: 12ff: fe34: 3322.
- Types of IPv6 addresses:

• Global Unicast: Identifies a single host on the Internet. Prefixes will be assigned to each organization (48 bits or less), as seen in the picture. The IANA defines the prefix for these prefixes like 2000:: / 3.
• Link-Local: Each interface receives one of these addresses. It is used for the devices on the same network to communicate without having to use the Global Unicast address. Use the prefix FE80:: / 10 + the EUI-64 format.
• Site-local. Single address within the scope of the organization, not routable on the Internet. Prefix: FEC0:: / 10.

- Multicast: Identified by prefix FF00:: / 8. The next 4 bits are flags, and the other 4 next define the scope of Multicast (shown below). Beside, a diagram of the range of scopes.

• 1 = Interface-local.
• 2 = link-local.
• 5 = site-local.
• 8 = Organization-local.
• E = Global.

- Anycast: A Global Unicast address assigned to more than one device, set it as anycast. Has as its route to the nearest anycast device. See below.

- IPv6 Hosts must meet at least the following addresses:

• Global Unicast and Anycast (2000:: / 3)
• Link-local (FE80:: / 10, by Autoconfiguration
• Loopback (:: 1 / 128)
• Multicast all-nodes (FF01:: 1 and FF02:: 1)
• Another group multicast assigned.

- Routers, and this answer should also respond in address:

• Anycast address of the subnet (the subnet address with the Interface ID - Host address - set to 0)
• All-Multicast routers (FF01:: 2, FF02:: 2, FF05:: 2)
• Groups defined by multicast routing protocols (if applicable). EIGRP for IPv6: FF02:: 10, OSPFv3: FF02:: 5 (all routers) and FF02:: 6 (only DR and BDR).

- The main forms of transition from IPv4 to IPv6 can be made through the Dual Stack (running both IPv4 and IPv6 to no longer have need for IPv4) and tunneling (encapsulate the IPv6 packet within an IPv4 packet - figure). For the tunneling is expected the prefix 2002:: / 16.

References:

- CCNP BSCI Official Exam Certification Guide 4th edition, por Brent Stewart. CiscoPress

- CCNA 4.1 Guia Completo de Estudo, por Marco Filippetti. Visual Books

- CertProject, imagem do header IPv6.

- Cisco IOS IPv6 Multicast Introduction - Very good.

- RFC 3513 Internet Protocol Version 6 (IPv6) Addressing.

I would pay special support to all who will make sure during the month of June.

A big hug,

Maurício Bento Ghem.

Hello Guys,

As I am studying for BSCI great summary of each routing protocols for IPv4.

One detail that should be noted that this was done in English resumão (: S). Believe staff, I can think better in English now, especially for the study. As the summary is presented in topics is interesting for all.

For those who are studying for the CCNA is interesting to give a brief look to see what is out there and enjoy some topics that are scope of certification.

A Abrasive,

Maurício.

Below:

Big Resume

EIGRP:
- Cisco proprietary and distance vector protocol (hybrid).
- Incremental updates.
- Uses Dual and crazy metric with K-values (1,3, Bw e DLY default)
- Establishes neighbors and mainting 3 tables (neighbor, topology, routing table).
- Neighbors must match: authentication, subnet, k-values, hello and dead timers.
- Only protocol that supports unequal cost load-balancing and backup routes (Feasible sucessor).
- If FS > AD the router can be a Feasible Sucessor.
- If there isn’t a feasible sucessor the router sends queryes for its neighbors asking for the route.
- Stuck-in-Active (SIA) is when a network is so big that it searches through it. To solve, router stub or summarization.
- Support ip summary address eigrp in the interface for summarizing the networks.
- Support keychain MD5 and plaintext authentication per interface.
- Support percentage of bandwidth usage, very used in PVC links.
- If you redistribute into EIGRP and don’t set a default-metric the route don’t to go to the routing table, because metric = infinite.»Continuar lendo Summary of Routing Protocols - EIGRP + OSPF + ISIS + BGP

Hello Guys,

After a series of technical problems faced and now 100%, with more bandwidth for the site and redundancy, I would like to contribute a collection of laboratories for the practice to the CCNA certification.

The following laboratories have been posted on the blog. A compilation was made to group all in a post that was created for the CCNA and have been made to the Packet Tracer, allowing playing them with just a double click on the file of the PT.

Below:

Laboratory Ripv2 - Configuration and practice of commands.
EIGRP Lab - Successor, FS and Topology table.
OSPF Lab - DR & BDR Convergence.
Laboratory STP (spanning Tree) - Convergence.
Frame Relay Lab - Setup, practice and learning of commands.
Laboratory VLAN Trunking - Trunking System and Identification of.

Remember the blog is available other laboratories, but focused on the professional level certification from Cisco, CCNP.

I hope it was a useful and available to me to answer any questions.

A Abrasive,

Maurício.