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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 can use a route-map like I did above. For example attach it to router Jim on inbound updates and set the local preference there.

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

    Thank you

  4. @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?

  5. andrew says:

    I assume you are referring to this:
    R3(config-router)#neighbor route-map LOCALPREF in

    If you switched the route-map LOCALPREF in to be route-map LOCALPREF out, then the route-map would no longer be doing anything. Essentially, this would cause R3 no longer to advertise a non-default Local Preference to R4.

    The neighbor where the route-map statement being applied, is R1. R1 is in a different ASN than R3. As you may recall, the Local-Preference attribute is only sent to iBGP neighbors, so attempting to set the Local Preference attribute for an EBGP neighbor would result in no action.

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