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| zherlock | I have period packet loss when doing icmp pings from any vm instance behind a floating IP, e.g. 2% packet loss of 100 packets with 1 pr sec. Assuming the challenge is somewhere in my network node pair, tried to restart complete network node in the pair. Running ubuntu 16 and 18 with older openstack, older openvswitch. Suggestions for tools/process to work out where the packet is dropped and why? No | 15:33 |
| zherlock | high CPU usage or any of the regular things to look at, have not found misconfig but no expert. Suspecting some sort of TX or RX buffer needing to be emptied or similar. | 15:33 |
| zherlock | Packet loss is seen also when testing on the network node within the namespace | 15:34 |
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| DHE | You've already checked the hardware switches for packet loss and the CPU usage of openvswitch to ensure it's not max'ing out? | 15:42 |
| DHE | also a floating IP is just a NAT rule. there shouldn't be any difference using a floating IP vs not. | 15:43 |
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| zherlock | DHE: A hardware server on same switches do not get loss. Thinking it could be more openvswitch and everything using one of the namespaces and its gateway ip on its route. Probably not related to SNAT involved or not then as you say. | 16:17 |
| zherlock | Common factor is at least that it is traffic going through those network nodes where the L3 agents and such is running. | 16:18 |
| zherlock | Packet loss/packets drepped is seen at the virtual interface within the namespace, not on the physical interface / physical switch. | 16:18 |
| zherlock | For CPU usage, checked on the network node. I have tried to see if the controller nodes could be involved here somehow. What is known is that if lot of API traffic the controller nodes are too slow to handle, not anything beefy. These seem however to only have all the DHCP namespaces on it | 16:20 |
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| pmatulis | where is the openstack docs channel? #openstack-docs is empty | 21:01 |
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