Hi,
I programmed the OF controller to send a of_mod message:
m = of.ofp_flow_mod()
m.priority = 0x7000 # Pretty high
m.match.dl_type = ethernet.ARP_TYPE
m.match.dl_dst = EthAddr("FF:FF:FF:FF:FF:FF")
m.idle_timeout = 100
m.hard_timeout = 0
m.actions.append(of.ofp_
action_output(port=of.OFPP_CONTROLLER))
event.connection.send(m)
once it is connected to a switch. The goal of this is to enforce all the
ARP requested incoming to a connected sw to be directly forwarded to the
controller WITHOUT broadcasting the ARP in any case.
And when I got the reply for flow_stats for a random sw, it is showing that
of_mod is actually set correctly e.g.
FlowStats rxed from sw_00-00-00-00-00-01 : [{'packet_count': 0,
'hard_timeout': 0, 'byte_count': 0, 'duration_sec': 0, 'actions':
[{'max_len': 65535, 'type': 'OFPAT_OUTPUT', 'port': 'OFPP_CONTROLLER'}],
'duration_nsec': 44000000, 'priority': 28672, 'idle_timeout': 100,
'cookie': 0, 'table_id': 0, 'match': {'dl_type': 'ARP', 'dl_dst':
'ff:ff:ff:ff:ff:ff', 'get_nw_dst': 'None', 'get_nw_src': 'None'}}]
However, sws continue broadcasting arp reqs even though they forward them
also to the controller. What may be the possible problem causing that, any
idea would be greatly appreciated.
Thanks.
Mehmet Fatih Aktas
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