Pravin, I think you mentioned that you were doing some work on bug-fixing in MPLS. Does it sound like it has any relationship to this bug reported by Stefano?
On Tue, Nov 11, 2014 at 11:25:34PM +0100, Stefano Salsano wrote: > Hi, > > we need to POP out two MPLS labels in an egress node and then send > out the packet as plain IP packet, but apparently this is not > working in Open vSwitch v2.390 operating in kernel mode > > We have replicated the problem in a simple mininet setup (script > attached) with four nodes connected as follows: > > h1---peo1----peo2---h2 > h1 source node, peo1 ingress node, peo2 egress node, h2 dest node > > - h1 pings h2 (automatic static arp table are used, so there is no ARP) > - peo1 pushes two mpls labels in the packet > - peo2 is supposed to pop the two labels and forward the packet as IP > > we have a rule to match the outer label, POP it and resubmit as MPLS packet: > actions=pop_mpls:0x8847,resubmit(,1) > > then we have a rule to match the inner label, POP it and output on > a port as an IP packet: > actions=pop_mpls:0x0800,output:11 > > both rules match (and the first pop works), but then the packet > does not exit from the port 11 > > we have also tried without success to recirculate the packet > implicitly after the first pop, replacing the first action with: > actions=pop_mpls:0x8847 > > Can anyone help us to identify the problem ? Are we doing something > wrong or is it a bug? > > The mininet script to setup the topology and create the rules in > order to reproduce the problem is attached. > > Some details are reported hereafter for the scenario with explicit resubmit. > > thank you in advance for your help... > > ciao > Stefano > > - peo1 flow table > OFPST_FLOW reply (OF1.3) (xid=0x2): > duration=275.553s, table=0, n_packets=58, n_bytes=5684,ip,in_port=2 > actions=push_mpls:0x8847,set_field:262144->mpls_label,push_mpls:0x8847,set_field:524292->mpls_label,goto_table:1 > > duration=275.493s,table=1,n_packets=58,n_bytes=5684,mpls,in_port=2,mpls_label=524292 > actions=output:1 > > - peo2 flow table > OFPST_FLOW reply (OF1.3) (xid=0x2): > > duration=317.678s,table=0,n_packets=58,n_bytes=6148,mpls,in_port=1 > actions=goto_table:1 > > duration=317.618s,table=1,n_packets=58,n_bytes=6148,mpls,in_port=1,mpls_label=524292 > actions=pop_mpls:0x8847,resubmit(,1) > > duration=317.559s,table=1,n_packets=58,n_bytes=6148,mpls,in_port=1,mpls_label=262144,mpls_bos=1 > actions=pop_mpls:0x0800,output:2 > > NB If the interfaces created by Mininet in the root namespace happen > to be down, stop the Network Manager and then restart the experiment > -- > ******************************************************************* > Stefano Salsano > Professore Associato > Dipartimento Ingegneria Elettronica > Universita' di Roma Tor Vergata > Via del Politecnico, 1 - 00133 Roma - ITALY > > http://netgroup.uniroma2.it/Stefano_Salsano/ > > E-mail : stefano.sals...@uniroma2.it > Cell. : +39 320 4307310 > Office : (Tel.) +39 06 72597770 (Fax.) +39 06 72597435 > ******************************************************************* > > #!/usr/bin/python > > import subprocess > > from mininet.net import Mininet > from mininet.node import Host, OVSKernelSwitch, Node > from mininet.cli import CLI > from mininet.log import lg, info > > def setup(): > > lg.setLogLevel('info') > > net = Mininet(switch=OVSKernelSwitch, build=False, autoStaticArp=True ) > > host1 = net.addHost("h1") > host2 = net.addHost("h2") > > peo1 = net.addSwitch("peo1") > peo2 = net.addSwitch("peo2") > > net.addLink(peo1, peo2) # 1 | 1 > net.addLink(host1, peo1)# N/A | 2 > net.addLink(host2, peo2)# N/A | 2 > > net.start() > > #PEO1 Configuration > root = Node( 'root', inNamespace=False ) > root.cmd('ovs-vsctl --no-wait set bridge %s protocols=OpenFlow13' > %(peo1.name)) > root.cmd('ovs-ofctl -O OpenFlow13 add-flow %s > "table=0,hard_timeout=0,priority=32768,in_port=2,eth_type=0x800,actions=push_mpls:0x8847,set_field:262144->mpls_label,push_mpls:0x8847,set_field:524292->mpls_label,goto_table:1"' > %(peo1.name)) > root.cmd('ovs-ofctl -O OpenFlow13 add-flow %s > "table=1,hard_timeout=0,priority=32768,in_port=2,eth_type=0x8847,mpls_label=524292,action=output:1"' > %(peo1.name)) > > #PEO2 Configuration > root.cmd('ovs-vsctl --no-wait set bridge %s protocols=OpenFlow13' > %(peo2.name)) > root.cmd('ovs-ofctl -O OpenFlow13 add-flow %s > "table=0,hard_timeout=0,priority=32768,in_port=1,eth_type=0x8847,actions=goto_table=1"' > %(peo2.name)) > root.cmd('ovs-ofctl -O OpenFlow13 add-flow %s > "table=1,hard_timeout=0,priority=32768,in_port=1,eth_type=0x8847,mpls_label=524292,action=pop_mpls:0x8847,resubmit(,1)"' > %(peo2.name)) > root.cmd('ovs-ofctl -O OpenFlow13 add-flow %s > "table=1,hard_timeout=0,priority=32768,in_port=1,eth_type=0x8847,mpls_label=262144,mpls_bos=1,action=pop_mpls:0x800,output:2"' > %(peo2.name)) > > CLI(net) > net.stop() > subprocess.call(["sudo", "mn", "-c"], stdout=None, stderr=None) > > > if __name__ == '__main__': > setup() > > > > > > > _______________________________________________ > discuss mailing list > discuss@openvswitch.org > http://openvswitch.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
