Hello Guys,

I would like to inform you that today was the HD updated the blog.

Were inserted all books CiscoPress official to study for each of the CCNP tests. Moreover, were included as simulated (TKS and P4S) to recommend its use only to identify the weaknesses in their study.

Another interesting tool for the study that was included is the video Mentors! All are narrated by the author Jeremy Cioara. For all that is good understanding of English is a perfect tool for setting the contents read in books.

Follow the link for the HD blog:
http://bentow.4shared.com

A Abrasive,
Maurício.

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.

Hello Guys,

Step in our continuing study of BGP, make them a great picture that shows the choice of the best route in BGP, which is available in the book:

CCNP BSCI - Official Exam Certification Guide, 4th edition. Written by: Brent Steward.

The BGP is the protocol that has the highest metric! It uses attributes and metrics is enormous because it is composed of several of these attributes.

The attributes available to do the tuning of BGP are shown below.

Abrasive and a success in the study.

Maurício.

Hello Guys,

Continuing the initiative of the blog to be reference in the study of Cisco Certifications, now present a summary of messages and states of the BGP protocol.

Below.

BGP messages:

• Open: When the BGP process starts are established connections to TCP port 179 to the BGP OPEN message.

• KeepAlive: KeepAlive indicating that the connection is still established.

• Update: update network messages. Sent early in the process and when updates occur on the network.

• Notification: When a neighbor restart Notification is sent a message indicating that the relationship is ending.

BGP states:

• Idle - Seeking neighbors.

• Connect - TCP connection established with neighbor

• Open Sent - BGP OPEN message sent

• Open Confirm - Response received

• Established - BGP neighbor Connection established.

Troubleshooting

• Established is good, rest is the problem.
• If the neighboring state of not progressing to Idle, verify that the next-hop is achievable.
• If the neighbor is in state Active is not configured or is not behaving as expected.
• Make sure the neighbor is correct: IP addresses, Autonomous System (AS), configuration and authentication.

A hug staff,

Maurício.

Hello staff,

With only a week for the big day, I’m practicing my very practical skills in areas I felt I needed a backup.

One of these was how the convergence of OSPF protocol in multi-access networks and the IDs of the routers with the choice ofDR and BDR on the network.

The laboratory has been done so you can see the convergence of the network when it on a modification.

Note that each multi-access segment has the election of a DR and / or BDR, so for the networks that have only one device, this will take only a DR and BDR no.

With respect to the Router ID, this is the largest IP interface in a logical (loopback). If there is a logical interface, the RID is defined as the highest IP address of an interface participating in the process of routing.

You can download them below:

Link to download the complete Lab Convergence OSPF Multi-access (DR and BDR).

Below a picture of the laboratory.

A Abrasive staff,

Maurício.

Hello staff,

Complementing my studies (and of you) on the conceptual part of the EIGRP below:

Regarding routes:

• Successor route: Route to a major destination. Is shown in the command show ip route andshow ip route EIGRP topology as successor.
• Feasible Successor: A possible alternative route to a destination. Presented in the table of topology and only goes into the routing table when a successor route becomes unreachable, or has a cost greater than the FS.

With respect to metric (cost)

• Feasible Distance: Distance calculated to a destination. It is composed of the reported distance + the calculated cost to the destination.
• Reported Distance (Distance advertised): Distance advertised by a neighbor router to a destination. This metric will always be smaller than the Feasible distance (as if more is going on a routing loop).

Here is the demonstration of these concepts.

R_Matriz # sh ip EIGRP topology
IP-EIGRP Topology Table for AS 10

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - Reply status

P 172.16.1.0/30, 1 successors, FD is 46226176
via Connected, Serial0/0.100
P 172.16.2.0/30, 1 successors, FD is 46226176
via Connected, Serial0/0.200
P 172.16.3.0/30, 1 successors, FD is 46226176
via Connected, Serial0/0.300
P 0.0.0.0/0, 1 successors, FD is 2169856
via Rstatic (2169856/0)
P 192.168.20.0/24, 1 successors, FD is 46228736
via 172.16.1.2 ( 46228736 / 28160 ), Serial0/0.100
P 192.168.30.0/24, 1 successors, FD is 46228736
via 172.16.2.2 (46228736/28160), Serial0/0.200

Feasible Distance

Reported Distance

Abrasive staff,
Maurício.

Hello Guys,

As can be seen, stopped updating the blog a bit, due to the fact that I am studying a lot to satisfy me until the beginning of April!

For all who wish to know the way in which I am organizing for the study below.

1. Read the book of Marco Filippeti CCNA 4.1.
2. Do laboratories routing (ACL, NAT, routing protocols, routes of learning …).
3. Do laboratory switching (VLAN, VTP, administration, Etherchannel, STP …).
4. Read for understanding the book of Mark and NetAcademy, parts of Switching and setting switches.
5. Do all TestKing from Switching.
6. Add a Pass4Sure for weaknesses.
7. Back to step 4 by reading what is identified as weak, and follow the sequence to identify that I am prepared.
8. Mark the event for maximum 3 days later.

This is my personal roadmap studies.

If you have any comments to one supplemented, or another suggestion, thank you very much involvement.

Abrasive,

Maurício.

Hello Guys,

This summary is for some who already had their doubts as the connections used between network devices.

Below.

And do not forget. For any type of connection console, the cable is used differently: rollover.

A hug and good week.

Maurício.

Hello staff,

Today, I made a dummy for the Certification and I fled the correct boot sequence and default locations of where they are loaded each of their items.

Here is the order of the boot that is loaded and where:

1. POST (Power-on self-test) - check the hardware.
2. Bootstrap (something like the BIOS of the router) - Loaded from ROM.
3. IOS (OS of the device) - Born from the FLASH. The device seeks to IOS in the following sequence: Flash, tftp and ROM (mini-ios).
4. Config (file startup-config) - Born from the NVRAM, if not found in a search TFTP server. If not found in either, enter into setup mode.

Please note that the locations of where they are loaded each of the above can be changed. Typically, the Bootstrap and the IOS will be loaded from their seats standard, and the place settings sometimes modified.

Success to us all!

Maurício.

References:

- Odom, W. - “Guide for Certification of Cisco CCNA Exam 3rd Edition”, High Books/2003.