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Thread: CFG H2+ no-prepend replace-as

  1. #1

    CFG H2+ no-prepend replace-as

    I just heard some guys discussed about no-prepend replace-as in H2+ but I did not understand the question and why do Cisco ask about it? Please discuss and help me.

    Thanks.

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    ping li (08-15-2019)

  3. #2

    Re: CFG H2+ no-prepend replace-as

    CE router should not see AS 65001 information when info send by PE Router(R50/R51/R52)

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    ping li (08-15-2019)

  5. #3

    Re: CFG H2+ no-prepend replace-as

    let me share with you the full question:

    Refer to the “Overall Scenario”, “Diagram 2: Initial Topology” and “Diagram 4: Pre- merge Topology”. Jacob’s decided to enable MPLS VPN in their network Configure Jameson’s network as per the following requirements: based on Topology.
    • Redistribute between EIGRP and BGP, not allow to do any aggregate at R55 and R56.
    • R1 have peer with R50, R51, R52 and R1 must be router-reflector.
    CE in Jocobs do not see AS 65001 in NLRI

  6. The Following 4 Users Say Thank You to Robin For This Useful Post:

    BPDU (10-04-2018) , ccie2018 (04-15-2018) , ping li (08-11-2019) , yjp58 (10-29-2018)

  7. #4

    Re: CFG H2+ no-prepend replace-as

    Please share the solution for this one also.

  8. #5

    Re: CFG H2+ no-prepend replace-as

    Quote Originally Posted by ccie2018 View Post
    Please share the solution for this one also.
    That is my solution, you can test in your lab
    **Hidden Content: Thanks to see the content**

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  10. #6

    Re: CFG H2+ no-prepend replace-as

    Quote Originally Posted by Robin View Post
    That is my solution, you can test in your lab
    ***Hidden content cannot be quoted.***
    Thank for sharing your solution, I tested and it worked with me.

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    cciezy (04-16-2018) , diespongebob33 (06-15-2018) , James (04-28-2018) , mamlo (05-01-2018) , sayyod (01-07-2019)

  12. #7

    Re: CFG H2+ no-prepend replace-as

    Did anybody used SOO in H2/H2+ for loop protection?

  13. #8

    Re: CFG H2+ no-prepend replace-as

    Thank you for solution. going to test it

  14. #9

    Re: CFG H2+ no-prepend replace-as

    Thanks.
    So this is the solution for following question: CE in Jocobs do not see AS 65001 in NLRI


    What is the solution for following questions:

    1. PE Routers in JACOBS location should not contain AS65006 in BGP NLRI
    ---> Here also do we have to remove AS65006 from 50,51 and 52 and use AS65001 AS number. (DO we need to use no "no-prepend replace-as" here also)


    2. PE Routers in JACOBS location should not contain AS65001 in BGP NLRI (This is mentioned in H2)
    --> As per solution mentioned, local-as command is used on R50,51,52 in bgp neighborship with R1:
    neigh 10.255.1.1 remote-as 65001
    neigh 10.255.1.1 local-as 65001

    Is this correct or any additional thing is required ?

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    yjp58 (10-29-2018)

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