BGP NEIGHBOR IS NOT FORMED BETWEEN HQ AND BRANCH

[aidnet]

Hello team what is the course for the BGP not form neighbor between HQ and branch

[Quint021]

Hello @aidnet ,

Please refer to the BGP section for troubleshooting below:
https://community.fortinet.com/t5/FortiGate/Troubleshooting-Tip-FortiOS-routing-RIP-OSPF-BGP-static-...

Generally, the first step is verifying packets over port 179 are being exchanged between the Hub and Branch. Once there is bi-directional traffic flow, collecting the BGP debugs should provide further insights.

Kind Regards,

[aidnet]

we are facing an issue with the Overlay network is not up for BGP ... it shows never active

[fricci_FTNT]

Hi @aidnet ,

Is it iBGP or eBGP?
Can the two BGP neighbors ping each other? Is there a static route (or a valid dynamic route) between the two BGP peers?
Please check the following article:
https://community.fortinet.com/t5/FortiGate/Technical-Tip-Configuring-IBGP-and-EBGP-neighborship/ta-...

If it is eBGP and they are not directly connected (same subnet), you may need to enable the ebgp-enforce-multihop setting (https://community.fortinet.com/t5/FortiGate/Technical-Tip-Configuring-eBGP-MultiHop/ta-p/204898 )

Best regards,

[aidnet · Accepted solution]

hello team we found the solution

1. there is a filter in our BGP which lets the BGP not form

2. the interface used in VPN tunnel is wrong, so we changed the interface

3. the pre-shared key for the VPN does not match so we changed

[fricci_FTNT]

Hi @aidnet ,

Thank you for letting us know. I am glad that you have managed to resolve the issue.

Have a great day and week!

Best regards,