HP VAN SDN Controller Administrator Guide

23
Figure 14 Path Daemon Flowchart
Gets Packet-In for a
connected device
Is it a broadcast or a
multicast packet?
Does Topology
Service permit
flood ?
Yes FloodYes
End
Drop packet-in
no
no
Are the source and
destination end hosts
available with Node Service.
no
Yes
Are source and dest end
hosts connected to same
switch through different
interfaces.
Paves a directional
flowmod on the
specified device
with the appropriate
match fields.
yes
Create and place the
packet out for the
received packet-in
back to device.
no
Does Topology
service have a path
between the source
and dest end hosts?
No
Yes
Iterate through the list of devices and for
each device pave a directional flowmod
from source device to destination device.
Push the received
packet-in on source
device
Start
Register for IPv4 and ARP
packet-in types at
Director level.
Flow miss arrives