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Solved
Port mirroring on GS724TP
I have a GS724TP gigabit managed switch. I have enabled port mirroring as per the image below, but on the device connected to port g22, all I get is the broadcast traffic that I would have got anywa...
Thanks for the configuration confirmation Hopchen. It was a right pain to debug, in the end built an Ubuntu laptop to fully test the port and not use the Ubuntu server instance it was patched to. It was in the end not a lack of promiscuous on either Ubuntu instance that was the issue, it was a lack of promiscuousness on the underlying virtualization layer. Citrix Xen does not act as a pass through even when a physical port is mapped uniquely to one host, so you need the following command executed in the Xen Hypervisor
ovs-vsctl -- set Bridge xenbr1 mirrors=@m \
-- --id=@eth1 get Port eth1 \
-- --id=@vif1.1 get Port vif1.1 \
-- --id=@m create Mirror name=eth1-mirror select-dst-port=@eth1 \
select-src-port=@eth1 output-port=@vif1.1Where the physical interface is eth1 on the Citrix Xen Hypervisor, and vif1.1 is the virtual interface applied to the host.
Thanks for the configuration confirmation Hopchen. It was a right pain to debug, in the end built an Ubuntu laptop to fully test the port and not use the Ubuntu server instance it was patched to. It was in the end not a lack of promiscuous on either Ubuntu instance that was the issue, it was a lack of promiscuousness on the underlying virtualization layer. Citrix Xen does not act as a pass through even when a physical port is mapped uniquely to one host, so you need the following command executed in the Xen Hypervisor
ovs-vsctl -- set Bridge xenbr1 mirrors=@m \
-- --id=@eth1 get Port eth1 \
-- --id=@vif1.1 get Port vif1.1 \
-- --id=@m create Mirror name=eth1-mirror select-dst-port=@eth1 \
select-src-port=@eth1 output-port=@vif1.1
Where the physical interface is eth1 on the Citrix Xen Hypervisor, and vif1.1 is the virtual interface applied to the host.
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