Posts Tagged ‘tips’

Nov
25

Have you ever been on your GradedLabs rack of equipment and wanted to test a particular feature or set of configurations, but you certainly do not want to keep these changes on the rack? Perhaps this is because you are right in the middle of solving a Volume 2 lab and you certainly cannot have that configuration impacted.

Thanks to the very handy config replace command, you can easily rollback almost instantly to your previous saved configuration after your experimenting. Here is a demonstration of just how simple this is. Enjoy, and let us give thanks for all there is to learn on blog.ine.com! :-) I also want to thank my good friend Keith Barker for first showing me this one.

Rack29R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Rack29R1(config)#hostname TEST
TEST(config)#interface fastethernet0/0
TEST(config-if)#ip address 1.2.3.4 255.0.0.0
TEST(config-if)#no shut
TEST(config-if)#end
TEST#
Nov 25 09:09:58.856: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to
up
Nov 25 09:09:59.173: %SYS-5-CONFIG_I: Configured from console by console
TEST#configure terminal
Nov 25 09:10:01.404: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne
t0/0, changed state to up
TEST#config replace nvram:startup-config force
Total number of passes: 1
Rollback Done
Rack29R1#
Nov 25 09:10:08.644: Rollback:Acquired Configuration lock.
Nov 25 09:10:17.827: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state t
o administratively down
Nov 25 09:10:18.829: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne
t0/0, changed state to down
Rack29R1#
Nov 25 09:10:22.727: %PARSER-3-CONFIGNOTLOCKED: Unlock requested by process ’3′.
Configuration not locked.
Rack29R1#
Rack29R1#configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Rack29R1(config)#hostname TEST
TEST(config)#interface fastethernet0/0
TEST(config-if)#ip address 1.2.3.4 255.0.0.0
TEST(config-if)#no shut
TEST(config-if)#end
TEST#
TEST#config replace nvram:startup-config force
Total number of passes: 1
Rollback Done
Rack29R1#
Rack29R1#show run interface fa0/0
Building configuration...
Current configuration : 83 bytes
!
interface FastEthernet0/0

 no ip address
 shutdown
 duplex auto
 speed auto
end

Rack29R1#

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Apr
08

One of our students in the INE RS bootcamp today, asked about an OSPF sham-link. I thought it would make a beneficial addition to our blog, and here it is.  Thanks for the request Christian!

Reader’s Digest version: MPLS networks aren’t free. If a customers is using OSPF to peer between the CE and PE routers, and also has an OSPF CE to CE neighborship, the CE’s will prefer the Intra-Area CE to CE routes (sometimes called the “backdoor” route in this situation), instead of using the Inter-Area CE to PE learned routes that use the MPLS network as a transit path. OSPF sham-links correct this behavior.

This blog post walks through the problem and the solution, including the configuration steps to create and verify a sham-link.

To begin, MPLS is set up in the network as shown with R2 and R4 acting as Provider Edge (PE) routers, and MPLS is enabled throughout R2-R3-R4.

R1 and R5 are Customer Edge (CE) routers, and the Serial0/1.15 interfaces of R1 and R5 are temporarily shut down, (this means the backdoor route isn’t in place yet, and at the moment, there is no problem).

mpls-ospf sham

Currently, R1 and R5 see the routes to each others local networks through the VPNv4 MPLS network, and the routes show up as Inter-Area OSPF routes with the PE routers as the next hop. Continue Reading

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Jan
16

Hello everyone. We have posted the following updated chapters of our Volume 1 self-paced workbook:

  • IPv6 (including IPv6 Multicast)
  • MPLS
  • IP Routing

We are not done with IP Routing chapter improvements, but the purpose of this update was to redesign the OER section to function with the latest Graded Labs topology.

Enjoy the updates and thanks for choosing INE!

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Dec
17

Using an IPS Sensor, we can dynamically apply rate limiting/policing on a router interface, based on a signature match or an event action over-ride, which is generated on the sensor appliance.   Ok, I know there is no Sensor Appliance in the RS lab, but what if we need to trigger a rate limit of specific traffic, destined to a router, based on current conditions on that router, such as transmit or receive loads on an interface.

This is a job for, da dada dahhh: Embedded Event Manager (EEM).  In this example we will create a service policy which we will apply to the control plane based on a interface threshold being exceeded.  Full labs on Embedded Event Manager can be found in our RS v5 Vol1 workbook in  “System Management“.  Let’s break down the individual steps, first for the control plane policing policy, and then the EEM to apply it. Continue Reading

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Jun
29

Hello all! Writing to you from the 2009 Networkers Conference in San Fran. I hope all readers around the world are well today and feeling the buzz about Cisco technologies.

We have many of the CCIE R/S Written Bootcamp students testing this week at the Networkers Conference. As such, we made Practice Exam 1 a priority and completed it last night. It is now posted and available in all Member’s Sites.

This 100 question practice exam covers all topics within scope and should defintely pinpoint any of your weak areas. Enjoy!

NOTE: The actual CCIE R/S Written is currently 105 questions, but only 100 of the questions are graded.

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Jun
18

I have all three parts of this for everyone now in the on-demand format – enjoy!

Part 1 Core Knowledge Discussion

Part 2 OSPF Review

Part 3 OSPF Review Continued

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Jun
05

One of community members found this great subnetting practice page. Enjoy!

Subnetting Practice Page

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May
30

Module 4 IP RoutingLesson 3 OSPF Adjacencies and Troubleshooting of the CCIE R/S Written Bootcamp has been updated to include an interactive demonstration of the configuration of NBMA mode in a hub and spoke Frame Relay environment. The interactive demonstration occurs just after the discussion of the various OSPF Network Types. Remember, you can use the Class On Demand controls at the bottom of the interface to fast forward to this new content if you prefer.

As always, enjoy your studies!

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May
24

Some things never change. CCENT and CCNA candidates still have the roughest time in the curriculum with the topic of subnetting.

Hey! No problem! We have all been there. Just remain patient, remain calm, and keep working through examples and practice problems.

Do you want a quick quiz to see if your skills are up to speed? Check out this blog post:

Subnetting Practice Quiz 1

Let’s walkthrough a common subnetting question type in this blog entry. Here is the question, followed by how I would solve it in the written exam on my scratch paper.


“You run the ipconfig command and discover your IP address and subnet mask are: 172.16.129.180/255.255.255.128. What is your network address?”

Continue Reading

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May
16

The latest track to receive a Core Knowledge Section is Security.

The new section arrives Jun 15, 2009. INE hopes to have the new CCIE Security Core Knowledge Simulation released on May 20, 2009.

Here is the official Cisco link (which does not say much):

Official Cisco Announcement

Here is some facts about this new section:

  • You must complete this portion of the exam before you start the traditional configuration portion.
  • You have a total of 30 minutes to complete this section, you may finish early if you like and immediately begin your configuration section.
  • You will receive 4 questions via the computer and you must provide short answers using the computer interface. The questions are not oral in nature. Typical responses require 4 to 5 words at most.
  • Spelling and/or grammar does not count against you.
  • The questions are manually graded by a proctor. If you purchase an exam re-read, they will re-grade your question responses.
  • You may not return to the short answer questions once you have begun the configuration portion of the lab exam.
  • You will not receive a score when you complete this section, but you must pass this portion to pass the CCIE. You will receive your score in the open-ended section if you fail the exam. The score is reported as 0% or 100% (pass or fail). You may only miss one question in the section in order to pass.
  • Most students finish the 4 to 5 questions in approximately 12 minutes.
  • The configuration portion of the exam has been reduced to accommodate this initial 30 minutes.
  • You still have a total of 8 hours that makeup the open-ended questions and the configuration portion.
  • You may not access the DOC-CD to answer these questions.

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