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Forum Replies

  1. Hi Rene,

    I think that it is a errata:

    This prefix-list checks the entire 2001::/16 range and permits subnets with a /64 or larger.
    It should be:

    This prefix-list checks the entire 2001::/16 range and permits subnets with a /64 o smaller

    Thanks you

  2. Cisco documentation from 2016 provides different order for outbound filtering:

    For inbound updates the order of preference is:
    route-map
    filter-list
    prefix-list, distribute-list

    For outbound updates the order of preference is:

    filter-list
    route-map | unsuppress-map
    advertise-map (conditional-advertisement)
    prefix-list|distribute-list
    ORF prefix-list (a prefix-list the neighbor sends us)
    

    https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5816-bgpfaq-5816.html

  3. @ReneMolenaar @lagapides have a question concerning the filter-list filtering. This may sound like a silly question. Why did you do the configurations to add AS 11 to the AS path out going 2001:db8:0:1::/64 traffic on R1. Why didn’t you do it on router R2?.

    R1(config)#router bgp 1
    R1(config-router)#address-family ipv6
    R1(config-router-af)#**neighbor 2001:db8:0:12::2** route-map PREPEND out
    

    Since we are using the neighbor command. Shouldn’t the command be affecting the neighbor router and not the local router. Please, i need clarification.

  4. @lagapides thank you for clearing that out. That helped me a lot. Now i have a better understanding.

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