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Hello,

I try again. Any l2gw plugin user that wants to comment on my email ?

thank you

Saverio


On 29/05/17 16:54, Saverio Proto wrote:
> Hello,
> 
> I have a question about the l2gw. I did a deployment, I described the
> steps here:
> https://review.openstack.org/#/c/453209/
> 
> The unicast traffic works fine, but I dont understand what is the idea
> behind the handling of the broadcast traffic.
> 
> Looking at openvswitch:
> 
> I obtain the uuid with `vtep-ctl list-ls`
> 
> vtep-ctl list-remote-macs <uuid>
> 
> In this output I get an entry for each VM that has an interface in the
> L2 network I am bridging:
> 
> ----
> # vtep-ctl list-remote-macs <uuid>
> ucast-mac-remote
>   fa:16:3e:c2:7b:da -> vxlan_over_ipv4/10.1.1.167
> 
> mcast-mac-remote
> -----
> 
> The ucast-mac-remote entry is created by Openstack when I start a VM.
> (Also it is never removed when I delete the instance, is this a bug ? )
> Note that 10.1.1.167 is the IP address of the hypervisor where the VM is
> running.
> 
> But mcast-mac-remote is empty. So this means that ARP learning for
> example works only in 1 way. The VM in openstack does not receive any
> broadcast traffic, unless I do manually:
> 
> vtep-ctl add-mcast-remote ee87db33-1b3a-42e9-bc09-02747f8a0ad5
> unknown-dst  10.1.1.167
> 
> This creates an entry in the table mcast-mac-remote and everything works
> correctly.
> 
> 
> Now I read here http://networkop.co.uk/blog/2016/05/21/neutron-l2gw/
> about sending add-mcast-remote to the network nodes and then doing some
> magic I dont really understand. But I am confused because in my setup
> the tenant does not have a L3 router, so there is not a qrouter
> namespace for this network, I was planning to keep the network node out
> of the game.
> 
> Is anyone running this in production and can shed some light ?
> 
> thanks
> 
> Saverio
> 
> 
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> 
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> 
> 


-- 
SWITCH
Saverio Proto, Peta Solutions
Werdstrasse 2, P.O. Box, 8021 Zurich, Switzerland
phone +41 44 268 15 15, direct +41 44 268 1573
saverio.proto at switch.ch, http://www.switch.ch

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