Regarding Floating IP not reachbale

Slawek Kaplonski skaplons at redhat.com
Wed Jun 9 20:51:33 UTC 2021


Hi,

Dnia środa, 9 czerwca 2021 21:14:17 CEST Adivya Singh pisze:
> Hello Team,
> 
> I need a hint , where to check, as often my floating IP are not reachable
> in Openstack , it uses OVS based networking , and most of the time if i
> changed the
> l3 agent router it start working, I can ping the gateway from the qrouter
> namespace but can not ping the actual floating IP
> 
> Regards
> Adivya Singh

First of all You need to know what type of router are You using: DVR, DVR-HA, HA or 
Legacy. Depending on that You can look in different places why FIP is not working.
For HA or Legacy type, please start pinging FIP from outside and try to check, e.g. with 
tcpdump if packets are visible in qrouter namespace on qg- and qr- interfaces. If that is 
correct, try to check if You can ping Your fixed IP address from that qrouter namespace. 
With that test You should be able to figure out if problem is somewhere in the external 
network (the one from which FIP is) or the tenant network. 
For DVR routers, test should be similar but there is also fip- namespace on the compute 
node and You should start checking there.
Details about different scenarios are also described in the https://docs.openstack.org/
neutron/latest/admin/deploy-ovs.html[1] - maybe that will be useful for You.

-- 
Slawek Kaplonski
Principal Software Engineer
Red Hat

--------
[1] https://docs.openstack.org/neutron/latest/admin/deploy-ovs.html
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