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Forums » CCIE Forums » CCIE Service Provider Technical » SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?
Latest post 09-08-2009 9:28 PM by Jent. 4 replies.
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  • 09-04-2009 9:38 AM

    • Jent
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    SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?

    Reply Contact

    I'll post this same thing here on SP technical since only very few people seem to read the workbook sections. Sorry for that!

     

    <clip>

    As you all know, if you have a TE-tunnel which endpoint is non-PE router you'll have to use "mpls ip" and accept targeted LDP-sessions in order not to break the LSP between PE-routers.

    In task 5.2 you're asked to run traffic between R4 and R5 for VLANs 5 and 6. Problem is that R3 pops (PHP) tunnel-label before sending it to R4 and due to this R4 sees the VPN-label and doesn't know what to do with it (or at least it doesn't forward it to R6 :)

    In task 4.1 it was stated that LDP or TDP shall not be used. Is there a way to solve the TE-tunnel problem without enabing LDP/TDP no the tunnel?

    It works just great when I propagate and additional label through the tunnel so that R4 doesn't get exposed to the VPN-label.

    Same thing with task 5.3 it seems.

    </clip>
    • Post Points: 20

  • 09-07-2009 8:27 AM In reply to

    • Jent
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    • Joined on 01-28-2009
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    Re: SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?

    Reply Contact

    Anyone? Scott? :)
    • Post Points: 20

  • 09-08-2009 9:49 AM In reply to

    Re: SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?

    Reply Contact
    Havd not looked at the question but try targeted ldp session. Fixes most issues

    Sent from my iPhone 3G

    On 07 Sep 2009, at 17:32, Jent <bounce-Jent@ieoc.com> wrote:

    Anyone? Scott? :)




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    Kind regards

    James R. Yeo

    CCIE#11676 R&S+Security+Service Provider

     
    • Post Points: 5

  • 09-08-2009 9:49 AM In reply to

    Re: SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?

    Reply Contact
    Maybe mpls ldp explicit-null, do not have the lab in front of me to be sure but worth a tryl ?

    Regards
    Kevin

    On Fri, Sep 4, 2009 at 5:48 PM, Jent <bounce-Jent@ieoc.com> wrote:

    I'll post this same thing here on SP technical since only very few people seem to read the workbook sections. Sorry for that!

     

    <clip>

    As you all know, if you have a TE-tunnel which endpoint is non-PE router you'll have to use "mpls ip" and accept targeted LDP-sessions in order not to break the LSP between PE-routers.

    In task 5.2 you're asked to run traffic between R4 and R5 for VLANs 5 and 6. Problem is that R3 pops (PHP) tunnel-label before sending it to R4 and due to this R4 sees the VPN-label and doesn't know what to do with it (or at least it doesn't forward it to R6 :)

    In task 4.1 it was stated that LDP or TDP shall not be used. Is there a way to solve the TE-tunnel problem without enabing LDP/TDP no the tunnel?

    It works just great when I propagate and additional label through the tunnel so that R4 doesn't get exposed to the VPN-label.

    Same thing with task 5.3 it seems.

    </clip>




    Internetwork Expert - The Industry Leader in CCIE Preparation
    http://www.internetworkexpert.com

    Subscription information may be found at:
    http://www.ieoc.com/forums/ForumSubscriptions.aspx
    • Post Points: 20

  • 09-08-2009 9:28 PM In reply to

    • Jent
    • Top 25 Contributor
    • Joined on 01-28-2009
    • Finland
    • Elite
    • Points 6,180

    Re: SP WP2 5.2 - Is there a way to make traffic between VLAN5 and VLAN6 work without LDP-session inside the tunnel?

    Reply Contact

    kevin:
    Maybe mpls ldp explicit-null, do not have the lab in front of me to be sure but worth a tryl ?

    That's what I thought also when doing the lab, but you can't execute the command on the interface unless it's running LDP/TDP ! (entire MPLS topology was over TE-tunnels, LDP wasn't run at all).
    • Post Points: 5
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