Re: [ovs-discuss] veth pair and MPLS

[Thomas Crowley]

I have attached a setup that demonstrates what I am talking about.  I
am using floodlight to install my flows.

Thank you,
Tom

On Sun, Mar 12, 2017 at 5:42 AM, Raymond Burkholder  wrote:
>> I am attempting to create a test network using OVS bridges.  I created
>> 8 namespaces that represent hosts.  I connected all of my bridges with
> patch
>> ports except between b4 and b5 which are connected via an veth
>> pair.   This configuration works fine until I start adding MPLS labels
>> at b2 and b6.  If I switch the veth pairs to patch ports my mpls setup
> works.
>> What am I missing why are my veth pairs not sending my mpls packets
>> through.
>
> Would you happen to have configs showing what you are attempting to
> accomplish?  They help immensely in troubleshooting problems.  And many
> times, when making something suitable for publication, a solution tends to
> present itself!
>
>
> --
> This message has been scanned for viruses and
> dangerous content by MailScanner, and is
> believed to be clean.
>


net_test_1.sh
Description: Bourne shell script
import httplib
import json
  
class StaticFlowPusher(object):
  
def __init__(self, server):
self.server = server
  
def get(self, data):
ret = self.rest_call({}, 'GET')
return json.loads(ret[2])
  
def set(self, data):
ret = self.rest_call(data, 'POST')
return ret[0] == 200
  
def remove(self, objtype, data):
ret = self.rest_call(data, 'DELETE')
return ret[0] == 200
  
def rest_call(self, data, action):
path = '/wm/staticflowpusher/json'
headers = {
'Content-type': 'application/json',
'Accept': 'application/json',
}
body = json.dumps(data)
conn = httplib.HTTPConnection(self.server, 8080)
conn.request(action, path, body, headers)
response = conn.getresponse()
ret = (response.status, response.reason, response.read())
print ret
conn.close()
return ret
  
pusher = StaticFlowPusher('127.0.0.1')
  
flowB1_1 = {
'switch':"99:00:00:00:00:00:00:b1",
"name":"ADD_V10_B1",
"cookie":"0",
"priority":"32768",
"in_port":"2",
"active":"true",
"actions":"push_vlan=0x8100,set_field=eth_vlan_vid->10,output=1"
}

flowB1_2 = {
'switch':"99:00:00:00:00:00:00:b1",
"name":"REMOVE_V10_B1",
"cookie":"0",
"priority":"32768",
"in_port":"1",
	"eth_vlan_vid":"0x100A",
"active":"true",
	"instruction_apply_actions":"pop_vlan,output=2"
#"actions":"pop_vlan,output=2"
}
  
flowB7_1 = {
'switch':"99:00:00:00:00:00:00:b7",
"name":"ADD_V10_B7",
"cookie":"0",
"priority":"32768",
"in_port":"2",
"active":"true",
"actions":"push_vlan=0x8100,set_field=eth_vlan_vid->10,output=1"
}
  
flowB7_2 = {
'switch':"99:00:00:00:00:00:00:b7",
"name":"REMOVE_V10_B7",
"cookie":"0",
"priority":"32768",
"in_port":"1",
"eth_vlan_vid":"0x100A",
"active":"true",
	"instruction_apply_actions":"pop_vlan,output=2"
#"actions":"strip_vlan,output=2"
}

#B2  1 = b2-b1   2 = b2-b3
# ADD MPLS
flowB2_1 = {
'switch':"99:00:00:00:00:00:00:b2",
"name":"B2_1",
"cookie":"0",
"priority":"32768",
"in_port":"1",
"active":"true",
"actions":"push_mpls=0x8847,set_field=mpls_label->0x04d2,output=2"
}

#B2  REMOVE MPLS
flowB2_2 = {
'switch':"99:00:00:00:00:00:00:b2",
"name":"B2_2",
"cookie":"0",
"priority":"32768",
"in_port":"2",
"active":"true",
	"eth_type":"0x8847",
	"mpls_label":"0x04d2",
	"instruction_apply_actions":"pop_mpls=0x04d2,output=1"
#"actions":"output=1"
}

	
flowB3_1 = {
'switch':"99:00:00:00:00:00:00:b3",
"name":"B3_1",
"cookie":"0",
"priority":"32768",
"in_port":"1",
#	"eth_type":"0x8847",
#	"mpls_label":"0x04d2",
"active":"true",
#	"instruction_apply_actions":"set_mpls_label=0x04d2,output=2"
"actions":"output=2"
}



flowB3_2 = {
'switch':"99:00:00:00:00:00:00:b3",
"name":"B3_2",
"cookie":"0",
"priority":"32768",
#	"eth_type":"0x8847",
#	"mpls_label":"0x04d2",
"in_port":"2",
"active":"true",
#	"instruction_apply_actions":"set_mpls_label=0x04d2,output=1"
"actions":"output=1"
}

flowB4_1 = {
'switch':"99:00:00:00:00:00:00:b4",
"name":"B4_1",
"cookie":"0",
"priority":"32768",
"in_port":"1",
#	"eth_type":"0x8847",
#	"mpls_label":"0x04d2",
"active":"true",
#	"instruction_apply_actions":"set_mpls_label=0x04d2,output=2"
"actions":"output=2"
}

flowB4_2 = {
'switch':"99:00:00:00:00:00:00:b4",
"name":"B4_2",
"cookie":"0",
"priority":"32768",
#	"eth_type":"0x8847",
#	"mpls_label":"0x04d2",
"in_port":"2",
"active":"true",
#	"instruction_apply_actions":"set_mpls_label=0x04d2,output=1"
"actions":"output=1"
}


flowB5_1 = {
'switch':"99:00:00:00:00:00:00:b5",
"name":"B5_1",
"cookie":"0",

Re: [ovs-discuss] veth pair and MPLS

[Raymond Burkholder]

> I am attempting to create a test network using OVS bridges.  I created
> 8 namespaces that represent hosts.  I connected all of my bridges with
patch
> ports except between b4 and b5 which are connected via an veth
> pair.   This configuration works fine until I start adding MPLS labels
> at b2 and b6.  If I switch the veth pairs to patch ports my mpls setup
works.
> What am I missing why are my veth pairs not sending my mpls packets
> through.

Would you happen to have configs showing what you are attempting to
accomplish?  They help immensely in troubleshooting problems.  And many
times, when making something suitable for publication, a solution tends to
present itself!


-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

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