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Notable Replies

  1. hy, i’m something problem in my network, can you help me.
    example ;
    - added 2 router James
    - added 1 router CE
    - AS 1 and AS 2
    - Local preference : 700
    - routing router CE to router James A and B with OSPF
    how to configur Local preference in router Jim ?
    My topology ;

    router CE ==> router james A & B (AS :1) ======> (AS:2) router Jim & Jon


  2. You don't have any direct connection with Jim to John then why are you using the neighbor command between them?

    Thank you

  3. @Salvatore it depends :slight_smile: It's possible that the ISP has one "block" of public IP space that is used for IP addresses on their routers and to assign to customers. In that case, you probably advertise the entire block in BGP. It's also possible to only advertise the customer address space. That could be the subnets behind your routers...in your case,, and

    @William what prefixes did you learn from and what does the route-map look like?

  4. Hi Rene,

    I always get confused with the in and out direction. Would you please explain more about the when i should use direction in and when i should use out?

    Thank you in advance.

  5. Hi Helen,

    It really depends on what you are trying to change, first of all, keep in mind that inbound/outbound is from the router's perspective.

    Local preference is something we change for OUR autonomous system so we have to apply it to prefixes that we receive. This means we'll have to do it inbound.

    AS Path prepending is something we want to do when we send it to a neighbor, so it has to be outbound. The same for MED...it is advertised to a neighbor.


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