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Thanks François for your help.I added the following command:
neighbor 172.16.201.121 transport connection-mode passive

Celan is not working.

On the other hand, between 2 cisco routers, I have no problem. I'm missing something. I continue to search even if the documents I find do not correspond to my situation.


Franck

> Le 26 oct. 2021 à 22:43, Francois <rigault.francois at gmail.com> a écrit :
> 
> Hello
> On Tue, 26 Oct 2021 at 21:29, Franck VEDEL
> <franck.vedel at univ-grenoble-alpes.fr> wrote:
>> 
>> Hello,
>> I'm trying to get BGP / BGP speaker / DRAgent to work with Neutron on one side and a Cisco router on the other. I work under Centos / Kolla-ansible / Wallaby.
>> I adapt this technical documentation (https://docs.openstack.org/neutron/latest/admin/config-bgp-dynamic-routing.html) to my configuration but I am having difficulties (the cisco router sends a TCP SYN frame to the router in Openstack, TCP port 179, but the router sends back an RST. I don't understand why, no security on the router port).
> 
> My understanding is that the agent will connect to the switch, there
> is no connection initiated from the switch to the agent. There should
> be a "neighbor... passive" option in the BGP configuration on the
> switch that you could set to ensure it's not trying to initiate the
> connection.
> If you follow this doc (and you use ovs as driver, not ovn) you should
> see the dragent connecting to the switch and publishing routes if any.
> 
> hope that helps
> 
> 
>> Do you have any links to help, tutorials, that would be of great help to me. Thanks in advance.
>> 
>> Franck
>> 
>> 
> Francois

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