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.
darisandy
Staff
Staff
Article Id 229333
Description This article describes how FortiGate processes BGP Updates when Soft Reconfiguration is enabled towards that BGP Neighbor
Scope FortiGate.
Solution BGP Soft Reconf.PNG

 

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