[ovs-discuss] OVS sends barrier reply in response to vendor request

[Ben Pfaff]

On Mon, Apr 28, 2014 at 10:05:26PM +0530, love you wrote:
> I have marked those packets which are exchanged on switch connect with my
> controller.
> 
> I do not get any error message.
> Problem is I do not get vendor reply in response to vendor request.
> 
> I want vendor reply for vendor request.

Here is how "ovs-ofctl ofp-parse-pcap" interprets this pcap.  The only
barrier replies that it lists are in response to barrier requests.

192.168.6.2.37637 > 192.168.6.8.6633:
OFPT_HELLO (xid=0x4):
 version bitmap: 0x01

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_HELLO (xid=0x1):
 version bitmap: 0x01

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_FEATURES_REQUEST (xid=0x2):

192.168.6.2.37637 > 192.168.6.8.6633:
OFPT_FEATURES_REPLY (xid=0x2): dpid:0000ee2ae865ea44
n_tables:255, n_buffers:256
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE
 1(veth0): addr:ca:20:7e:43:06:bd
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 2(vxlan100a): addr:da:0e:a3:02:c9:d9
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
 3(veth2): addr:1a:94:67:e8:04:75
     config:     0
     state:      0
     current:    10GB-FD COPPER
     speed: 10000 Mbps now, 0 Mbps max
 LOCAL(br0): addr:ee:2a:e8:65:ea:44
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_SET_CONFIG (xid=0x3): frags=normal miss_send_len=65535

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_FLOW_MOD (xid=0x4): ADD priority=0 actions=drop

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_BARRIER_REQUEST (xid=0x5):

192.168.6.2.37637 > 192.168.6.8.6633:
OFPT_BARRIER_REPLY (xid=0x5):

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_FLOW_MOD (xid=0x6): DEL_STRICT priority=10 actions=drop

192.168.6.8.6633 > 192.168.6.2.37637:
NXT_SET_FLOW_FORMAT (xid=0x7): format=nxm

192.168.6.8.6633 > 192.168.6.2.37637:
OFPT_BARRIER_REQUEST (xid=0x8):

192.168.6.2.37637 > 192.168.6.8.6633:
OFPT_BARRIER_REPLY (xid=0x8):