[neutron][OVN] North South wont work
Hello, I have the following issue: My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs. I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues. Could you please suggest how I can debug this problem? Openstack Env: 2025.1 Thank you. Regards Nguyen Huu Khoi
Hi, Dnia poniedziałek, 2 marca 2026 09:43:53 czas środkowoeuropejski standardowy Nguyễn Hữu Khôi pisze:
Hello,
I have the following issue:
My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs.
I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues.
Could you please suggest how I can debug this problem?
Is your compute node connected to that external network and have you got bridge_mappings configured properly on that node?
Openstack Env: 2025.1
Thank you. Regards
Nguyen Huu Khoi
-- Slawek Kaplonski Principal Software Engineer Red Hat
Hello, I created an instance with this provider network on the same compute and this is ok with the provider network. Nguyen Huu Khoi On Mon, Mar 2, 2026 at 3:50 PM Slawek Kaplonski <skaplons@redhat.com> wrote:
Hi,
Dnia poniedziałek, 2 marca 2026 09:43:53 czas środkowoeuropejski standardowy Nguyễn Hữu Khôi pisze:
Hello,
I have the following issue:
My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs.
I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues.
Could you please suggest how I can debug this problem?
Is your compute node connected to that external network and have you got bridge_mappings configured properly on that node?
Openstack Env: 2025.1
Thank you. Regards
Nguyen Huu Khoi
-- Slawek Kaplonski Principal Software Engineer Red Hat
Hello. I enable external gw for this router but when I show ovn-nbctl list Logical_Router_Port: I see external_ids : {"neutron:is_ext_gw"=False"}. What should I do to correct it? Nguyen Huu Khoi On Mon, Mar 2, 2026 at 4:11 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
Hello, I created an instance with this provider network on the same compute and this is ok with the provider network. Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 3:50 PM Slawek Kaplonski <skaplons@redhat.com> wrote:
Hi,
Dnia poniedziałek, 2 marca 2026 09:43:53 czas środkowoeuropejski standardowy Nguyễn Hữu Khôi pisze:
Hello,
I have the following issue:
My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs.
I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues.
Could you please suggest how I can debug this problem?
Is your compute node connected to that external network and have you got bridge_mappings configured properly on that node?
Openstack Env: 2025.1
Thank you. Regards
Nguyen Huu Khoi
-- Slawek Kaplonski Principal Software Engineer Red Hat
oh, my bad, It was true. Nguyen Huu Khoi On Mon, Mar 2, 2026 at 7:14 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
Hello.
I enable external gw for this router but when I show ovn-nbctl list Logical_Router_Port:
I see external_ids : {"neutron:is_ext_gw"=False"}. What should I do to correct it?
Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 4:11 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
Hello, I created an instance with this provider network on the same compute and this is ok with the provider network. Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 3:50 PM Slawek Kaplonski <skaplons@redhat.com> wrote:
Hi,
Dnia poniedziałek, 2 marca 2026 09:43:53 czas środkowoeuropejski standardowy Nguyễn Hữu Khôi pisze:
Hello,
I have the following issue:
My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs.
I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues.
Could you please suggest how I can debug this problem?
Is your compute node connected to that external network and have you got bridge_mappings configured properly on that node?
Openstack Env: 2025.1
Thank you. Regards
Nguyen Huu Khoi
-- Slawek Kaplonski Principal Software Engineer Red Hat
Hello. I don't know why my openstack router learns the wrong mac gw address so I must use ovn-sbctl destroy MAC_Binding to clear it. I see we have always_learn_from_arp_request="false" so is there any way to set a router to learn arp after a period of time. Nguyen Huu Khoi On Mon, Mar 2, 2026 at 7:24 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
oh, my bad, It was true. Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 7:14 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
Hello.
I enable external gw for this router but when I show ovn-nbctl list Logical_Router_Port:
I see external_ids : {"neutron:is_ext_gw"=False"}. What should I do to correct it?
Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 4:11 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> wrote:
Hello, I created an instance with this provider network on the same compute and this is ok with the provider network. Nguyen Huu Khoi
On Mon, Mar 2, 2026 at 3:50 PM Slawek Kaplonski <skaplons@redhat.com> wrote:
Hi,
Dnia poniedziałek, 2 marca 2026 09:43:53 czas środkowoeuropejski standardowy Nguyễn Hữu Khôi pisze:
Hello,
I have the following issue:
My router has an external interface and an internal interface. An instance can ping the router’s external interface, but it cannot ping the external provider network gateway. I am using distributed floating IPs.
I created another router using the same provider network, and instances connected to that router can reach the external gateway without any issues.
Could you please suggest how I can debug this problem?
Is your compute node connected to that external network and have you got bridge_mappings configured properly on that node?
Openstack Env: 2025.1
Thank you. Regards
Nguyen Huu Khoi
-- Slawek Kaplonski Principal Software Engineer Red Hat
participants (2)
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Nguyễn Hữu Khôi
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Slawek Kaplonski