API for SPAN

[edwarnicke]

I need vpp-agent to explose a grpc API for SPAN/RSPAN/ERSPAN.

[ondrej-fabry]

This is seems like new feature for vpp-agent.

I see this binary API for SPAN in span.api: https://github.com/FDio/vpp/blob/b7b929931a07fbb27b43d5cd105f366c3e29807e/src/vnet/span/span.api

For the others I have not found much.. there is ERSPAN mentioned in gre.api: https://github.com/FDio/vpp/blob/b7b929931a/src/vnet/gre/gre.api#L23

@edwarnicke could you please send some pointers for this as we have not used/configured this in VPP so far.

[edwarnicke]

Definitely a new feature. After investigation I am breaking this issue up. So for this one, we just need the SPAN API exposed. Should be roughly the same complexity as the XCon API it looks like.

[edwarnicke]

CLI command docs

[ondrej-fabry]

Implemented in #1430