[ovs-discuss] GRE tunnel outer IP & MAC.

Pravin Shelar pshelar at nicira.com
Thu Feb 12 00:53:04 UTC 2015


On Wed, Feb 11, 2015 at 4:17 PM, Ben Pfaff <blp at nicira.com> wrote:
> Pravin, I know that our DPDK native tunneling supports VXLAN.  David
> is trying to use GRE.  Is this supported?
>
Yes, It supports VXLAN and GRE tunneling.


> On Tue, Feb 10, 2015 at 1:52 PM, David Evans <davidjoshuaevans at gmail.com> wrote:
>> Hi OVS,
>>
>> I have 3.18 kernel containing ip_gre & Ovs 2.3.90 & Dpdk 1.7.1
>>
>> I find that the outer ip & mac are not populated ???  The ofproto/trace
>> output thinks that the gre output will have the right src/dest on the outer
>> but then it’s gone…
>>
>> a bug?
>> am I missing some setup?
>> Wrong kernel ip_gre?
>>
>> Originating GRE:
>> ovs-vsctl add-br b0  -- set bridge b0 datapath_type=netdev
>> ovs-vsctl add-port b0 gre0 -- set Interface gre0 type=gre
>> options:remote_ip=192.168.56.101
>> ovs-vsctl add-port b0 dpdk0 -- set Interface dpdk0 type=dpdk
>>
>> Output Bridge:
>> ovs-vsctl add-br b1  -- set bridge b1 datapath_type=netdev
>> ovs-vsctl add-port b1 dpdk1 -- set Interface dpdk1 type=dpdk
>> ifconfig b1 192.168.56.102 netmask 255.255.255.0
>>
>> Set up flows:
>> ovs-ofctl del-flows b0
>> ovs-ofctl del-flows b1
>> -force traffic to gre from dpdk0
>> ovs-ofctl add-flow b0 in_port=2,action=output:1
>> ovs-ofctl add-flow b0 in_port=1,action=output:0
>> -force traffic from b1 to output
>> ovs-ofctl add-flow b1 in_port=LOCAL,action=output:1
>> ovs-ofctl add-flow b1 in_port=1,action=output:LOCAL
>>
>> A ofproto/trace says
>>
>> ovs-appctl ofproto/trace b0 in_port=1,dl_dst=00:e0:ed:52:97:cd
>> Bridge: b0
>> Flow:
>> in_port=1,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:e0:ed:52:97:cd,dl_type=0x0000
>>
>> Rule: table=0 cookie=0 in_port=1
>> OpenFlow actions=output:2
>>
>> Final flow:
>> in_port=1,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:e0:ed:52:97:cd,dl_type=0x0000
>> Megaflow: recirc_id=0,in_port=1,dl_type=0x0000
>> Datapath actions:
>> tnl_push(tnl_port(5),header(size=38,type=3,eth(dst=00:00:04:04:12:34,src=00:e0:ed:52:97:cb,dl_type=0x0800),ipv4(src=192.168.56.102,dst=192.168.56.101,proto=47,tos=0,ttl=64,frag=0x40),gre((flags=0x0,proto=0x6558))),out_port(2))
>>
>>
>> Regards,
>>
>> Dave
>>
>> _______________________________________________
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>> discuss at openvswitch.org
>> http://openvswitch.org/mailman/listinfo/discuss
>>
>
>
>
> --
> "I don't normally do acked-by's.  I think it's my way of avoiding
> getting blamed when it all blows up."               Andrew Morton



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