Comment 16 for bug 1252900

Hi Darragh,

The ethernet of my "br-ex" interface is "eth2", the output of "ethtool -k
eth2" is:

---
root@netnode-1:~# ethtool -k eth2
Offload parameters for eth2:
rx-checksumming: on
tx-checksumming: off
scatter-gather: off
tcp-segmentation-offload: off
udp-fragmentation-offload: off
generic-segmentation-offload: off
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: off
---

And yes, my uplink router is a "Ubuntu KVM Virtual Machine", I have a valid
public IPv4 (189.8.93.64/28) routed to my own data center. The OpenStack
Network Node is connected to the uplink router (KVM VM) using a "GIGALan
3Com Manageable Switch".

Tks for the tips!

Best,
Thiago

On 25 November 2013 17:06, Darragh O'Reilly <email address hidden>wrote:

> Hi Thiago,
>
> from the tcpdump I see some packets are not being received and have to
> be retransmitted. Also some packets are much greater than 1500 bytes,
> but it seems only about 1500 are ACKed, which results in retransmissions
> too.
>
> Can you provide the output of 'ethtool -k ethX' where ethX is the one in
> br-ex. And if any offload stuff is on, disable it and retest.
>
> Can you tell us how your Neutron router is uplinked to the Internet? It
> seems 189.8.93.65 is the gateway_ip for the neutron external subnet.
> What kind of device is this? It's mac is 52:54:00:6a:5f:82, which seems
> to have a vendor prefix used by KVM.
>
> Darragh.
>
> --
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> report.
> https://bugs.launchpad.net/bugs/1252900
>
> Title:
> Directional network performance issues with Neutron + OpenvSwitch
>
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