[Ryu-devel] Deletion of particular flows with 'DELETE_STRICT'

[sudhanshu n. <sud...@gm...>]

Hi Everyone,

I have default rules for LLDP and table miss in my ryu. So initially I have
following rules in every mininet switch:-

cookie=0x0, duration=30.968s, table=0, n_packets=16, n_bytes=960,
priority=65535,dl_dst=01:80:c2:00:00:0e,dl_type=0x88cc
actions=CONTROLLER:65535
 cookie=0x0, duration=30.993s, table=0, n_packets=98, n_bytes=10771,
priority=0 actions=CONTROLLER:65535

Now I processed some traffic and following are the rules:-

cookie=0x0, duration=51.091s, table=0, n_packets=24, n_bytes=1440,
priority=65535,dl_dst=01:80:c2:00:00:0e,dl_type=0x88cc
actions=CONTROLLER:65535
 cookie=0x0, duration=7.242s, table=0, n_packets=0, n_bytes=0,
priority=1,arp,in_port="s1-eth2",dl_src=00:00:00:00:00:36,dl_dst=00:00:00:00:00:11
actions=output:"sr1-eth3"
 cookie=0x0, duration=7.237s, table=0, n_packets=1, n_bytes=42,
priority=1,arp,in_port="s1-eth1",dl_src=00:00:00:00:00:36,dl_dst=00:00:00:00:00:11
actions=output:"sr1-eth3"
 cookie=0x0, duration=7.237s, table=0, n_packets=1, n_bytes=42,
priority=1,arp,in_port="s1-eth3",dl_src=00:00:00:00:00:11,dl_dst=00:00:00:00:00:36
actions=output:"sr1-eth1"
 cookie=0x0, duration=7.228s, table=0, n_packets=0, n_bytes=0,
priority=1,ip,in_port="s1-eth2",nw_src=10.0.0.36,nw_dst=10.0.0.11
actions=output:"sr301-eth3"
 cookie=0x0, duration=7.223s, table=0, n_packets=1, n_bytes=98,
priority=1,ip,in_port="s1-eth1",nw_src=10.0.0.36,nw_dst=10.0.0.11
actions=output:"sr301-eth3"
 cookie=0x0, duration=7.223s, table=0, n_packets=1, n_bytes=98,
priority=1,ip,in_port="s1-eth3",nw_src=10.0.0.11,nw_dst=10.0.0.36
actions=output:"sr301-eth1"
 cookie=0x0, duration=51.116s, table=0, n_packets=106, n_bytes=12438,
priority=0 actions=CONTROLLER:65535

Now I wanted to remove all extra flows other than original 2 flows for LLDP
and table miss. So I used FlowMod as following:-

req = parser.OFPFlowMod(datapath, cookie=0, cookie_mask=0,
table_id=OFPTT_ALL, command=ofproto.OFPFC_DELETE_STRICT, idle_timeout=0,
hard_timeout=0, priority=1, buffer_id=OFPCML_NO_BUFFER, out_port=OFPP_ANY,
out_group=OFPG_ANY, flags=0, match=None, instructions=None)
 datapath.send_msg(req)

The problem is its not deleting priority 1 flows and if I use
"ofproto.OFPFC_DELETE" as command, all the flows are getting removed.

Could anyone please let me know what am I missing here.

Thank you.

Warm Regards-
Sudhanshu Naithani