Technical Tip : BGP Routing process when 'Soft Reconfiguration' is enabled

[darisandy]

Description	This article describes how FortiGate processes BGP Updates when Soft Reconfiguration is enabled towards that BGP Neighbor
Scope	FortiGate.
Solution	The picture shows how FortiGate processes BGP updates and also the related CLI commands to check that prefix status By knowing this cycle, it is possible to try to troubleshoot the BGP Routing issue depending on which position the issue happened. Whether it is before or after the incoming filter, or if the issue is after the outbound filter. When it is configured, BGP neighborship can be flushed without terminating the BGP session. This is usually needed whenever changes have been made to route filtering. exe router clear bgp ip <neighbor IP> soft Note: If the soft reconfiguration is not enabled, It will show below error: get router info bgp neighbors 192.168.x.x received-routes Inbound soft reconfiguration not enabled No prefix for neighbor 192.168.x.x To fix this issue, enable soft configuration in the neighbor: set soft-reconfiguration enable