MPLS training question

Hey guys,
I took an MPLS course online and it pointed something out I really didn't get, or at least need clarification on.
The person giving the course said that because of how the PE's interact with the P LSR's that is isn't necessary to run a routing protocol in the core on the P's and that savings in resource is a reason to go to MPLS.
Can I get some clarification?
Do the P MPLS LSR's rely only on labels for routing or are they running a routing protocol in the background?
Thanks,
BR

Hi Brent,
Let me see if I can bring clarification.
The trainer said that running a routing protocol on the P routers was not necessary.
Let's have only a look at an MPLS VPN network, because that is what is referred to here, I think.
(Also, we only consider LDP and not TE as label distribution protocol.)
In that case, all PE and P routers need to run an IGP. When MPLS is deployed, MPLS still relies on
a routing protocol, which distributes the routes. LDP distributes the labels. LDP only assigns
labels to IGP routes in the routing table, hence an IGP is needed in the core. The routes from the
IGP and the labels from LDP are the two main ingredients needed to build the LFIB which is used
to forward the labeled packets.
Now, perhaps I know where the confusion comes from. I believe that in the training a hypothetical
alternate solution to MPLS VPN as we know it, was presented. Namely, that the VPN routes
could be distributed hop-by-hop from PE to P to PE routers by one IGP per VPN (and LDP
distributing the labels). This could be theoretically possible, but it would lead to scalability
issues because of the number of routing protocols. It also leads to an operational nightmare
for the people operating the MPLS network. Hence, that kind of MPLS VPN was never implemented.
I believe this could be the "savings in resource" that you mentioned.
In the real MPLS VPN solution, we run BGP between the PE routers which carry the VPN routes (and the VPN label),
hence the P routes do not need to run an IGP per VPN. They only need to run one IGP for the global routes.
BGP is not needed on the P routers.
Well, that's what I can come up with as an explanation. Anyway, you need to run an IGP on the P routers.
Thanks,
Luc.

Similar Messages

  • Training question

    Hi,
    I am beginning work on a team that utilizes HTML-db (application express).
    Can anyone provide me some direction as far as learning how best to use HTML-db? I am interested in any books, tutorials, and /or online courses that teach Html-db.
    My background consists of some C++ training along with use of HTML in webpage design.
    Any assistance you can provide would be appreciated.
    P.S. I posted this earlier today and for some reason it was deleted. If this is not in the correct section of the board please send me some notification so I don't keep re-posting it. Thanks.

    Hi,
    Your earlier post wasn't deleted, it's here -
    Training question
    If you haven't already discovered it, there's a huge amount of documentation, including HOWTO's, demo applications, whitepapers and all sorts of things here -
    http://www.oracle.com/technology/products/database/application_express/index.html

  • URGENT: QoS Design on Data Center MPLS - MediaNet Question...

    Hello,
    I am posting this in hopes I can get some guidance from anyone who has done this in the field.  We have a large enterprise customer with 21 sites all around the world, they have Verizon MPLS and are experiencing QoS related issues on their WAN regarding Video/Voice.  We have proposed remediating their network acccording to the Enterprise QoS SRND 3.3 and the new MediaNet SRND to account for Video and TP QoS (     
    http://www.cisco.com/en/US/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND_40/QoSCampus_40.html )
    Here is the problem/question that was proposed in our presales meeting and I honestly don't know where to look for an answer... I am not asking for anyone to design a solution for me, just merely point me in the right direction:
    The Data Center has a ~40MB MPLS Connection ( full mesh ) into the cloud ( Verizon )
    Site A has a 8MB connection
    Site B has a 4MB connection
    I know on the Service policy and the interfaces at SiteA and SiteB I can assign "Bandwidth xxxx" and use ~95% of the bandwidth to do queuing and shaping/policing ect.  I am not concerned with SiteA and SiteB, that I think I can handle...
    Question was posed from the customer, "How can we ensure at the DataCenter level the 40MB MPLS is "chopped" up so that only 8MB of the total speed goes to SiteA ALONG with an attached QoS policy designed for that specific site, as well as ensure only 4MB goes to SiteB with an attached QoS policy.
    So I am looking for a way to allocate bandwith per site on the DC 40MB connection going into the cloud ( so that SiteB cannot use more than 4MB ) and attach a MediaNet specific QoS Service policy to that site.  The customer does not have seperate MPLS circuits for each site, they all come into the DC on 40MB shared ethernet connection ( no VC, or dedicated circuits to other sites ). 
    Any thoughts on if this is possible? 
    Thanks!
    Alex

    This is an example I have seen and I hope that is useful to you.
    Site A
    Subnet: 172.16.1.0/24
    Site B
    Subnet:172.16.2.0/24
    HeadOffice:
    ip access-list extended Site_A
    permit ip any 172.16.1.0 0.0.0.255
    ip access-list extended Site_B
    permit ip any 172.16.2.0 0.0.0.255
    class-map match-any Site_A
    match access-group name Site_A
    class-map match-any Site_B
    match access-group name Site_B
    policy-map To_Spokes
    class Site_A
    shape average 8000000
    service-policy Sub_Policy(Optional)
    class Site_B
      shape average 4000000
      service-policy Sub_Policy(Optional)
    class class-default
      shape average 28000000
      service-policy Sub_Policy(Optional)
    Interface G0/0
    Description To MPLS cloud
    bandwidth 40000000
    service-policy output To_Spokes
    interface G0/1
      Description To HeadOffice
    bandwidth 40000000
    service-policy output To_Spokes
    It would be greatly appreciated if someone can correct this or improve it as I am still learning.
    Please see the netflow graph from one of our routers using a similar policy as above.

  • BASIS Training question

    Good morning,
    This is a question that is not 100% technical but does have relevance.
    For all the certified i5/OS BASIS people : Is it true that there is no TADM56 specifically for DB2 UDB for i5/OS? And if this is true then what course did you do? If this is false then when did you do your training and where?
    I would appreciate any input in this matter as I am having problems obtaining this information from all other sources and am desperate to complete my certification in my appropriate DB.
    Anette

    Hi Anette,
    yes, this is true ...
    This class (should) cover all the certification stuff you need - this contains on "millions of classes" AND the ADM525 for DB2 for system i.
    You can now book the other classes at SAP and this one class (with a different class number) @ IBM as only IBM gives ADM525 now.
    Regards
    Volker Gueldenpfennig, consolut.gmbh
    http://www.consolut.de - http://www.4soi.de - http://www.easymarketplace.de

  • XSAN training question

    Hello Everybody,
    This question is for anybody who had the xsan training.
    How is that? Do they teach you a lot? Is it worth it to go to the 3 day class?
    Also, I don't see a training for xserve raids, do they cover that in the xsan class?
    Any info is appreciated.
    Thank you,
    Helmut

    Be forewarned: While Xsan training is certainly a good idea, it will NOT teach you much about troubleshooting. Most teachers probably don't have much real-world troubleshooting experience. You'll have to learn that from the forums and your own experiences.
    G5   Mac OS X (10.4.3)   Xserve, Xserve RAID, Xsan 1.2

  • MPLS core questions

    Hi,
    I want to know the answers for the following failure scenario
    1.Unknown LSP connectivity problem: LSP connectivity problem ,Data plan issue, or unknown cause
    2.Distributed LFIB table discrepancy: There is a discrepancy in the LFIB table between the route processor and line cards
    3.Distributed LFIB table discrepancy: There is a discrepancy in the FIB table between the route processor and line cards

    hello dear mohisaxe,
    so sorry for the late response, yes we plan to use them on separate ports and both CE and use the same line card as both customer and MPLS core facing.
    just another quick question i have here:
    1- as Mr. Xander's information, MOD80 line card has 2 typhoons each of them can accommodate 32K PPPOE sessions with limitation of 64K limit per line card.
    2- as we have MOD160 line card with 4 typhoons, do we have the same limitation as above?
    thanks for your support :)

  • MPLS design question

    Hi all,
    what is the best solution to extend a node (PE router) over a third party IP network.
    Here is the scenario - there is a need to extend an MPLS network to a new location, but due to commercial/policy reason the only available options are a third part IP Network (non-MPLS) and a back haul wireless link. We are thinking of making the IP Network the primary link and the wireless back haul the back up links.
    Is L2TPv3 the only solution? I want to make use of the wireless back haul also for some traffic.
    Regards,
    san

    Hi Aasheesh,
    The service provider will only give me a L3 connectivity. In this case the LDP session will not establish with my PE on both ends.
    I tries GRE on my PE with LDP enabled and it seems to take the command, but i have to try this between two PE. so I am not sure if I can bring the tunnel up and allow the two PEs to exchange LDP. I was just hoping that i could find a doc on it so that I can be sure that it will work. If you know if any doc that would be great.
    reagrds,
    san

  • Acrobat Connect Training Question

    Hi,
    I am just wondering if other applications, besides
    PowerPoint, are supported by Adobe Connect's Training module for
    creating courses. For example, could HTML "slides" be converted to
    a training course? Or is PowerPoint the only means to creat a
    course for Connect's training module at this time?
    If this is true, are there plans in the future to support
    creating modules from other applications?
    Thanks, in advance.

    For training courses (or curriculums), you can have any item
    that you can put into the Content Library. There is no limit to
    what that can be except the 100mb upload limit, but only a
    Presenter Presentation (made in PPT) or a Captivate Presentation
    can have Quiz functionality and tracking. I don't believe that this
    is expected to change.
    Jorma@RealEyes

  • Online training question

    Just wondering if anyone has used the lynda.com online training service. If you have please post your thoughts on the service. BTW they do offer ilife application training including iweb. Thanks in advance.

    I've not used them but there are so many free tutorials available that paying $25/mo seems a bit much.
    You can start with Apple's: http://www.apple.com/ilife/tutorials/index.html
    The following were first posted by Len Goff in the iDVD forum:
    iDVD 6 Getting Started PDF download
    Apple's iMovie Learning Site
    Apple's iDVD Learning Site
    iLife ’06 Multimedia Tutorials
    General Learning Center
    Ken Stone: Authoring in iDVD 6
    iMovie HD & iDVD 6: The Missing Manual
    iPhoto 6: The Missing Manual
    Do you Twango?

  • Training Questions for XI Certification

    Hi all,
    i want to make my XI Certification next week.
    Has somebody any questions for me to prepare for the test or can tell something about it?
    I will appreciate your help.
    My E-Mail is: [email protected]
    Best regards,
    Jörg

    Hi,
    these threads are useful for u.
    1. SAP XI Certification - Important Topics
    2. Regarding XI Certification Material.
    3. Xi sample Certification questions
    rgds,
    latheesh

  • Important - Training question on BO

    Hi,
    I have been worknig SAP Basis for  10 years.
    We are looking for migration to business objects.
    What are the trainings available from the SAP Basis perspective. I went to www.sap.com/useducation but there were too many for this and got little confused.
    Please let us know. Your help will be appreciated.
    Regards.
    SC.

    Hi Sume,
    I'm looking for the same thing and I had a few discussions arround this same subject. According some SAP documents looks that in the future the most relevant tools in BO to be used by BW are in the presentation layer. Crystal reports and Excelsius basically. I'm planning to start by Crystal using the following path: http://www.sap.com/services/education/catalog/businessobjectstraining/businessintelligence/course.epx?context=%5b%5bBOBJ_BI_CR_2008%7cBOC310%7c%7c%7c%7cG%5d%5d%7c
    If you have anything else to add I would appreciate.
    Thanks,
    Thiago Modro

  • Peoplesoft Training Question

    Currently I am an E-Business guy (v12 & 11) and my company is getting into the Peoplesoft arena pretty heavily now. I see three(3) courses available for PeopleSoft. PeopleTools I Rel 8.50, PeopleSoft Security Rel 8.50 and Peoplesoft PeopleTools Upgrade and Data Management Rel 8.50. What, in your estimation, is the best course I should take offering me the biggest bang for my buck AND allowing me to learn something that I could immediately contribute in a Peoplesoft implementation? Thanks....

    Hi,
    I personally think that initially you should focus learning on the PeopleTools, in this way you will learn about the Development tools and the then basic strcuture of PeopleSoft applications, take first the PeopleTools I Rel 8.5.
    The other available courses PeopleSoft Security Rel 8.50 and Peoplesoft PeopleTools Upgrade and Data Management Rel 8.50, are complementary courses needed after you have all the basic know... and are focused on infraestructure role and not just development.
    I hope this information could help you
    Regards,
    Andrés Caro
    Edited by: Andres_Caro on Aug 9, 2012 12:11 PM

  • What is the best book to study MPLS.

                        I have recently started my MPLS training from best institute in gurgaon (http://networkerszone.com/) but was wondering if i can know the best book to do some self study as well, i have the cisco press book, is that sufficent?

    Hi
    Try this as it presents the reasons why MPLS became needed - it does not provide configs for cisco but will give you the reasons why. Good for CCIE SP...
    MPLS-Enabled Applications
    Emerging Developments and New Techologies
    Third Edition
    Ina Minei,and Julian Luek
    (Juniper Networks)
    regards
    Peter

  • Poll: Does your employer pay for your training and/or certification?

    Do you ever take advantage of those training opportunities?
    Does your employer pay for only some of your training?
    Tell us your experiences.
    Thank you for the feedback! Please feel free to email me privately if you have any training questions.
    Chris K.
    Education Account Manager, VSP
    [email protected]
    MasterLink Training
    www.masterlinktraining.com
    D: (262) 754-4302

    Over my career I have learned that if training is offered you should take it - whther it is free or paid for. For certification it has been typically paid for only if you pass - 

  • Closing the Forms Background Page closes the Java-Window as well

    Hi,
    we are running Forms 10g and start the Applet in an separate window. This cannot be changed, because otherwise we lose some size of the Window and the Look and Feel is to different as with Client-Server mode.
    If a User closes the Background-Window or starts a different URL in the Background-Window, the Java Applet is closed directly without any warning.
    This isn't nice for the Users, but they have to live with it.
    But if I'm running a couple of Forms-Sessions in the Applet maybe with Database-Locks as well, and somebody closes the BG-Window, those Forms-Sessions (frmweb.exe) keep running for ~ 5-10 Minutes and the Locks are kept as well.
    Is this behaviour intentional or can it be changed ?
    Any comments are welcome.
    Mark

    Hi Craig,
    in principle I agree that it might be a training issue, but ...
    the default setup for the IE at this customer-site is that Links don't open in a new window. We may change that, but who knows.
    With this setting, the following happens quite normally.
    Forms is started which leeds to the "Background-Window" and the Java-Applet.
    If i minimize all windows and start f.e. Citrix or any other URL-Link, that link is opened in the Background-Window and the Forms-Java-Applet dies.
    In theory this can be avoided by training, but I do not agree, that it is a reasonable behaviour to check all open windows before I start a new URL.
    It just doesn't make sense in my opinion. It might be difficult to solve, but it still doesn't make sense.
    But we've found a solution ourself at least for the accidential closing of the Backgrund-Window :
    In formswegh.cfg we had a line like :
    =======
    HTMLbeforeForm=<_p align=center><_b>nicht schliessen</_b></_p><_p align=center><_b>sonst wird die</_b></_p><_p align=center><_b>Anwendung abgebrochen !</_b></_p>"
    =======
    we added an onBeforeUnload so that it looks like :
    =======
    HTMLbeforeForm=<_BODY onBeforeUnload="return ' Achtung Anwendung wird geschlossen !'"><_p align=center><_b>nicht schliessen</_b></_p><_p align=center><_b>sonst wird die</_b></_p><_p align=center><_b>Anwendung abgebrochen !</_b></_p>
    =======
    This leads to an "Is it OK"-question as soon as the BG-Windows is closed or another URL is called. This prohibits the Users of accident closing. If they still do it, it's their fault and than it is a training question.
    Thanks for your input and maybe this help some others as well.
    Mark
    P.S.
    the underlines before the p's and b's need to be deleted. Just because they are interpreted as HTML otherwise

Maybe you are looking for