On Tue, Jun 5, 2018 at 2:13 PM, Jan Maria Matejka <jan.matejka@nic.cz> wrote:

Hello!

Hello Jan,

Thank you for looking into this.

I don't know whether I correctly understand what you are trying to do. Anyway, please
look at the attached script (for Linux). It creates two virtual routers CA and CB,
a BGP link between them and sends a route defined in protocol static {} on CA.

I am trying to remove a whole "protocol static {}" block from the configurations and have the withdrawal be sent to the peers upon "configure soft" without having to restart the BGP session.

Then it reconfigures CA to remove the static protocol and it correctly shows that
the route is withdrawn, at least for me at v1.6.4.

The routes are removed from bird, but a packet capture shows that no UPDATE message with the route withdrawals is actually sent to the peers, so the route lingers in the peers' routing tables.

Could you please try the attached script or try to create some reproducer for me
to see the bug clearly?

I will give the test-withdraw script a go and reply with more information.

Thank you,

Thomás