It looks like the cisco plugin dynamically creates/destroys VLANs on Cisco Nexus switches and adds appropriate trunk ports for compute hosts. I would imagine the goal is to avoid configuring a complex network of l2 switches with all VLANs enabled across all switches and ports and instead maintain a minimal configuration so that load is reduced and security enhanced. This would only apply for VLAN networking, not vxlan/gre tunnels.
That said, I don't have a Nexus to play with, so this is gathered from skimming the driver source rather than hands-on testing :) On Thu, Jun 26, 2014 at 1:59 AM, Lei Zhang <[email protected]> wrote: > Recently, I am learning the neutron ml2 plugins. But I can not understand > why the L2 physical switcher plugin(e.g. Cisco plugin) is need? > > In Neutron, all the packets are flow from Ethernet to another, no matter > what type(vlan? vxlan?) the packets are. So normally, the switcher doesn't > configure. > So what's the meaning and importance for the exist of L2 physical switcher > plugins? > > -- > Lei Zhang > Blog: http://xcodest.me > twitter/weibo: @jeffrey4l > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > -- Andrew Mann DivvyCloud Inc. www.divvycloud.com
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