Technical Tip: How to advertise single IP in the whole Network statically via BGP

[VinayHM]

Description	This article describes how to advertise a single IP in the whole Network statically via BGP.
Scope	FortiGate.
Solution	For example, this can happen when advertising 192.168.1.1/32 on BGP statically. Routing table: get router info routing-table details 192.168.1.1 Routing table for VRF=0 Routing entry for 192.168.1.0/24 Known via "static", distance 10, metric 0, best * vrf 0 192.168.1.254, via port2 Command to check the advertised-routes to neighbors: get router info bgp neighbors x.x.x.x advertised-routes 192.168.1.1/32 will not be shown on the advertised routes. Since the active route on routing-table is only 192.168.1.0/24, it shows a /24 network in the BGP advertised routes. Solution: While advertising a single IP in the whole network, it is necessary to create a separate static route for the IP to have an active route and be advertised in the BGP. In GUI, go to Network -> Static Routes and select 'Create New'. Destination: 192.168.1.1/32. Gateway Address: 192.168.1.254. Interface: port2. Administrative Distance: 10. Status: Enable. In CLI: config router static     edit 0         set dst 192.168.1.1/32         set gateway 192.168.1.254         set device port2         set status enable     next end For reference on creating a static route via GUI but in this case, 192.168.1.1/32 will be set as the destination address: Technical Tip: How to create a static route on FortiGate from the GUI Interface After creating a static route for the single IP, it will be possible to see the IP information in 'advertised BGP routes'.

[knaveenkumar]

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