Unable to Reach Floating IP: "Destination Host Unreachable"

Problem

  • A floating IP attached to an instance on a tenant network is unreachable.

  • When pinging the instance (assuming ICMP is allowed in the security group) externally, "Destination Host Unreachable" is observed.

pf9@compute-host-0:~$ ping 172.0.0.2
PING 172.0.0.2 (172.0.0.2) 56(84) bytes of data.
From 172.0.0.2 icmp_seq=1 Destination Host Unreachable

Environment

  • Platform9 Managed OpenStack - All Versions

  • Neutron

  • OVS

Cause

There is no physical interface associated with the external OVS bridge.

Resolution

  1. Add a physical NIC to the external bridge.

# ovs-vsctl add-port [ext-bridge] [interface-name]

Note: The external bridge may be labeled as br-pf9 or br-ext. To list the bridges and associated interfaces, use:

# ovs-vsctl show


© 2025 Platform9. All Rights Reserved

On This Page
Unable to Reach Floating IP: "Destination Host Unreachable"ProblemEnvironmentCauseResolution