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tedauction
tedauction
New Member
August 30, 2019
Question

BGP announcing routes ?

  • August 30, 2019
  • 2 replies
  • 3296 views

Hello, I have a single VDOM configured with my local BGP AS and also two different remote BGP AS peers i.e one on the external interface and one on the internal interface.

I want to propagate all learned BGP routes between my Fortigate and these peers.

I have configured my BGP peer neighbours. My question is do I also have to manually specify all the routes in the 'Networks' field of the local BGP options or will they auto advertise to both interfaces via BPG ?

...(or do I need to specify *.* in the Networks field of the local BGP options GUI).

    2 replies

    Toshi_Esumi
    SuperUser
    Toshi_Esumi
    SuperUser
    August 30, 2019

    If those are eBGP peers, BGP-learned routes are advertised once peering is established, like routes came from eBGP peer1 will be adervertised to eBGP peer2. But for other routing protocols/sources like connected, rip, ospf, static, and so on, you need to redistribute those routes into BGP domain to be advertised to BGP peers. That's what you would see in "show router bgp". By default none of those are redistributed like below. You need to at least "enable" each by "set status enable". In many situations, a route-map is applied to filter in or out routes from each protocol.

     

    config router bgp     config redistribute "connected"     end     config redistribute "rip"     end     config redistribute "ospf"     end     config redistribute "static"     end     config redistribute "isis"     end     config redistribute6 "connected"     end     config redistribute6 "rip"     end     config redistribute6 "ospf"     end     config redistribute6 "static"     end     config redistribute6 "isis"     end end

     

    j_a_m_e_s
    j_a_m_e_s
    New Member
    September 22, 2019

    Assuming the routes are in the BGP table (get router info bgp paths) and you have no filtering via route-maps, I believe the routes will be advertised. If you're worried about local networks such as NAT pools, you may need to add  network statement for these or do a redistribute connected. I haven't personally used the UI for BGP, but may be able to help if you post the BGP config.

    emnoc
    emnoc
    New Member
    September 23, 2019

    The "network" statements are for routes you advertise , eBGP peers and learned routes from within, will be advertised as stated earlier. Or redistribution of routes into the bgp table.

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