[ovs-discuss] [SFC NSH] Update "eth_dst" for original packet after decap nsh encapsulation packet.

[Hoàng Công Phước]

Hi Wang,

Could you upload your patch to ovs? I would appreciate your help about that
case ^^. Thank you.

Vào CN, 13 thg 1, 2019 vào lúc 04:36 wang junqiang <
wangjq_china at outlook.com> đã viết:

> Hi,
>     I also encountered this problem, need to change the source code to
> solve.
>
> 获取 Outlook for iOS <https://aka.ms/o0ukef>
>
> ------------------------------
> *发件人:* ovs-discuss-bounces at openvswitch.org 代表 Hoàng Công Phước <
> hoangphuocbk2.07 at gmail.com>
> *发送时间:* 星期六, 一月 12, 2019 11:11
> *收件人:* Ben Pfaff
> *抄送:* bugs at openvswitch.org
> *主题:* Re: [ovs-discuss] [SFC NSH] Update "eth_dst" for original packet
> after decap nsh encapsulation packet.
>
> here are the document I am following:
> https://github.com/openvswitch/ovs/blob/master/tests/nsh.at#L65-L68
> My ovs version is 2.9.0 and when I check ovs, in version 2.9.0, NSH is
> supported.
>
>
> Vào Th 7, 12 thg 1, 2019 vào lúc 01:52 Ben Pfaff <blp at ovn.org> đã viết:
>
>> I don't think OVS supports this kind of encapsulation.
>>
>> On Fri, Jan 11, 2019 at 10:42:10AM +0900, Hoàng Công Phước wrote:
>> > Hi Ben, thank for your
>> >
>> > I am sorry because I didn't show the encapsulation command. In this
>> case,
>> > original packet is encapsulated 2 times, with nsh and ethernet headers.
>> > Here is the flow:
>> >
>> > table=0, n_packets=0, n_bytes=0,
>> > priority=30,tcp,in_port="tap09d8de0e-20",nw_src=10.10.0.111,nw_dst=
>> > 10.10.0.0/24,tp_dst=80
>> >
>> actions=encap(nsh),set_field:0x33->nsh_spi,set_field:255->nsh_si,encap(ethernet),set_field:fa:16:3e:05:3a:12->eth_dst,resubmit(,5)
>> >
>> > As I known, after using decap() 2 times, I can get the original packet.
>> So,
>> > I can update eth_dst to it.
>> >
>> >
>> >
>> >
>> >
>> > Vào Th 6, 11 thg 1, 2019 vào lúc 04:32 Ben Pfaff <blp at ovn.org> đã
>> viết:
>> >
>> > > On Fri, Jan 11, 2019 at 04:26:03AM +0900, Hoàng Công Phước wrote:
>> > > > Hi experts,
>> > > >
>> > > > I am trying to update "eth_dst" for original packet after decap nsh
>> > > > encapsulation packet. Here is my command about it:
>> > > >
>> > > > $ sudo ovs-ofctl add-flow br-int "table=10, priority=1, dl_vlan=4,
>> > > > dl_dst=fa:16:3e:05:3a:12, dl_type=0x894f, nsh_mdtype=1,
>> nsh_spi=0x33,
>> > > > nsh_si=254, actions=strip_vlan,
>> > > > move:NXM_OF_ETH_DST->OXM_OF_PKT_REG0[0..47], decap(), decap(),
>> > > > move:OXM_OF_PKT_REG0[0..47]->NXM_OF_ETH_DST, output:tap62c2fc56-14"
>> > > >
>> > > > However, I got an error, that is:
>> > > > "2019-01-10T19:11:27Z|00001|meta_flow|WARN|destination field eth_dst
>> > > lacks
>> > > > correct prerequisites
>> > > > ovs-ofctl: actions are invalid with specified match
>> > > > (OFPBAC_MATCH_INCONSISTENT)"
>> > > >
>> > > > If I remove "move:NXM_OF_ETH_DST->OXM_OF_PKT_REG0[0..47]" and
>> > > > "move:OXM_OF_PKT_REG0[0..47]->NXM_OF_ETH_DST", it worked. So there
>> is an
>> > > > error with copy eth_dst value from outer to inner packet. I am
>> beginner
>> > > > with Open vSwitch, so it's very helpful if someone can help me to
>> figure
>> > > > the problem out.
>> > >
>> > > It looks to me that the first decap removes the NSH header and the
>> > > second decap removes the Ethernet header.  At that point, there's no
>> > > Ethernet destination field to set, so the error seems reasonable.
>> > >
>> >
>> >
>> > --
>> > Hoàng Công Phước
>>
>
>
> --
> Hoàng Công Phước
>


-- 
Hoàng Công Phước
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