[ovs-discuss] mod_dl_dst action not working

[Abhishek Verma]

I tried trace and i saw this:

root at akabra:/home/ubuntu# ovs-appctl ofproto/trace OFSWITCH
dl_type=0x800,nw_dst=10.0.0.1
Bridge: OFSWITCH
Flow:
ip,metadata=0,in_port=ANY,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_src=0.0.0.0,nw_dst=10.0.0.1,nw_tos=0,nw_ecn=0,nw_ttl=0
Rule: table=0 cookie=0 priority=501,ip,nw_dst=10.0.0.0/24
OpenFlow actions=output:3,mod_dl_dst:de:ad:ba:be:ba:be

Final flow:
ip,metadata=0,in_port=ANY,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=de:ad:ba:be:ba:be,nw_src=0.0.0.0,nw_dst=10.0.0.1,nw_tos=0,nw_ecn=0,nw_ttl=0
Megaflow: skb_priority=0,ip,in_port=ANY,dl_dst=00:00:00:00:00:00,nw_dst=
10.0.0.0/24,nw_ecn=0,nw_frag=no
Datapath actions:
set(tunnel(tun_id=0x0,src=0.0.0.0,dst=152.27.111.15,tos=0x0,ttl=64,flags(df))),4
root at akabra:/home/ubuntu#

I am sending out a packet with destination IP 10.0.0.1

Any ideas here?

Thanks, Abhishek




On Tue, Jul 14, 2015 at 8:26 PM, Abhishek Verma <abhishekv.verma at gmail.com>
wrote:

> Hi,
>
> I have added a flow rule as follows:
>
> ovs-ofctl add-flow OFSWITCH priority=501,dl_type=0x800,nw_dst=
> 10.0.0.0/24,actions=output:3,mod_dl_dst:de:ad:ba:be:ba:be
>
> I see that packets entering my bridge with dest_IP 10.0.0.1 hit this flow
> rule and go out on the specified port. I however, dont see the the
> destination MAC address being updated as expected.
>
> root at akabra:/home/ubuntu#  ovs-ofctl dump-flows OFSWITCH
> NXST_FLOW reply (xid=0x4):
>  cookie=0x0, duration=3522.895s, table=0, n_packets=3736, n_bytes=429792,
> idle_age=0, priority=0 actions=NORMAL
>  cookie=0x0, duration=59.564s, table=0, n_packets=31, n_bytes=3038,
> idle_age=24, priority=501,ip,nw_dst=10.0.0.0/24
> actions=output:3,mod_dl_dst:de:ad:ba:be:ba:be
> root at akabra:/home/ubuntu#
>
> More Information:
>
> root at akabra:/home/ubuntu#  ovs-ofctl show OFSWITCH
> OFPT_FEATURES_REPLY (xid=0x2): dpid:00000ab2d52dcd55
> n_tables:254, 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(eth0): addr:0a:b2:d5:2d:cd:55
>      config:     0
>      state:      0
>      speed: 0 Mbps now, 0 Mbps max
>  2(veth1): addr:8e:f8:0f:1b:ad:4d
>      config:     0
>      state:      0
>      current:    10GB-FD COPPER
>      speed: 10000 Mbps now, 0 Mbps max
>  3(gre0): addr:d6:75:ec:16:1f:86
>      config:     0
>      state:      0
>      speed: 0 Mbps now, 0 Mbps max
>  LOCAL(OFSWITCH): addr:0a:b2:d5:2d:cd:55
>      config:     0
>      state:      0
>      speed: 0 Mbps now, 0 Mbps max
> OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0
> root at akabra:/home/ubuntu#
>
> OF port 3 is a GRE tunnel end-point. I expect to see the dest MAC of the
> inner payload to get replaced with the MAC that i specify in the flow-rule.
>
> Is there something that i am missing?
>
> Thanks, Abhishek
>
>
>
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