[ovs-discuss] Mirror through GRE on DPDK ports not forwarding.

[David Evans]

Hi All,

I¹m setting up a GRE tunnel on an ovs bridge. (trunk ovs and dpdk 1.7.1)
I have two bridges with one DPDK interface each.
Traffic generator -> DPDK0 -> B0(bridge) -> GRE0 (172.168.1.4)
B1 (172.168.1.1) -> DPDK1 -> host 172.168.1.3 (GRE termination)

When I set up GRE as below and push packets in DPDK0 , arp requests for who
is 172.168.1.3 come out DPDK1 and I see them on the remote host OK So far.
And I can see replies coming back to DPDK1 from the remote host.

But the original packets to be mirrored don¹t make it through the tunnel.

Some setup features follow: (routes, gre port setup, etc)

./ovs-vsctl add-port b0 gre0 -- set Interface gre0 type=gre
options:remote_ip=172.168.1.3 options:local_ip=172.168.1.4 -- --id=@p get
port gre0 -- --id=@m create mirror name=m0 select-all=true output-port=@p --
set bridge b0 mirrors=@m

ifcoonfig b1 172.168.1.1 netmask 255.255.255.0

[root at localhost utilities]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
0.0.0.0         10.218.160.1    0.0.0.0         UG    1024   0        0
ens2f1
10.218.160.0    0.0.0.0         255.255.240.0   U     0      0        0
ens2f1
172.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 b1

[root at localhost utilities]# ./ovs-appctl ovs/route/show
Route Table:
Cached: 10.218.169.14/32 dev ens2f1
Cached: 127.0.0.1/32 dev lo
Cached: 172.168.1.1/32 dev b1
Cached: 192.168.122.1/32 dev virbr0
Cached: 172.168.1.0/24 dev b1
Cached: 10.218.160.0/20 dev ens2f1
Cached: 127.0.0.0/8 dev lo
Cached: 0.0.0.0/0 dev ens2f1 GW 10.218.160.1

afbc043c-ec1a-4050-a1c0-8f0b669f93e6
    Bridge "b0"
        Port "dpdk0"
            Interface "dpdk0"
                type: dpdk
        Port "gre0"
            Interface "gre0"
                type: gre
                options: {local_ip="172.168.1.4", remote_ip="172.168.1.3"}
        Port "b0"
            Interface "b0"
                type: internal
    Bridge "b1"
        Port "dpdk1"
            Interface "dpdk1"
                type: dpdk
        Port "b1"
            Interface "b1"
                type: internal

[root at localhost utilities]# ./ovs-ofctl show b0
OFPT_FEATURES_REPLY (xid=0x2): dpid:000000e0ed1fe4e8
n_tables:254, n_buffers:256
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src
mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
 1(dpdk0): addr:00:e0:ed:1f:e4:e8
     config:     0
     state:      0
     current:    10GB-FD
     supported:  100MB-FD 1GB-FD 10GB-FD FIBER AUTO_PAUSE
     speed: 10000 Mbps now, 10000 Mbps max
 2(gre0): addr:8e:f5:f5:95:ac:25
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(b0): addr:00:e0:ed:1f:e4:e8
     config:     PORT_DOWN
     state:      LINK_DOWN
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
[root at localhost utilities]# ./ovs-ofctl show b1
OFPT_FEATURES_REPLY (xid=0x2): dpid:000000e0ed1fe4e9
n_tables:254, n_buffers:256
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src
mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
 1(dpdk1): addr:00:e0:ed:1f:e4:e9
     config:     0
     state:      0
     current:    10GB-FD
     supported:  100MB-FD 1GB-FD 10GB-FD FIBER AUTO_PAUSE
     speed: 10000 Mbps now, 10000 Mbps max
 LOCAL(b1): addr:00:e0:ed:1f:e4:e9
     config:     0
     state:      0
     current:    10MB-FD COPPER
     speed: 10 Mbps now, 0 Mbps max
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0



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