FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
dnayak_FTNT
Staff
Staff
Description
This article looks at the effect of BGP synchronisation rule on learning BGP routes from the BGP peer.  It basically states that unless and until a route is present in IGP table, the FortiGate will not advertise BGP route to the BGP peer. Nor will it install the BGP route received from the peer into the routing table. By default, the synchronization is disabled.

Solution
Configuration CLI

config router bgp
    set as 12849
    set router-id 213.57.1.254
    set synchronization enable
        config neighbor
            edit "213.57.1.253"
                set remote-as 12849
            next
        end
  end


Verification of configuration and troubleshooting

FGT # get router info bgp summary
BGP router identifier 213.57.1.254, local AS number 12849
BGP table version is 5
1 BGP AS-PATH entries
0 BGP community entries

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd
213.57.1.253 4 12849 5075 2337 4 0 0 00:06:24 1

Total number of neighbors 1

FGT # get router info bgp neighbor 213.57.1.253 received-routes
BGP table version is 13, local router ID is 213.57.1.254
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal
Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path
*>i0.0.0.0/0 213.57.1.253 100 0 i


Default route 0.0.0.0/0 is being received from the peer. This route is not previously present in routing table. It is not in the IGP table.

FGT# get router info routing-table all
Codes: K - kernel, C - connected, S - static, R - RIP, B - BGP
O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
> - selected route, * - FIB route, p - stale info


The received route not present in the routing table.

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