A bit more context would be helpful. I believe that is a flow written by the 
classifier in the SFC103 demo, can you confirm this, please.

nshc1 - nshc4 are NSH context headers, that arent used for the SFC103 demo. 
Usually the NSH context headers are used to pass information between SFFs or 
SFs. For instance, in OPNFV SFC, nshc1 and nshc2 are set by the ingress 
classifier and are used by the last SFF in the chain to provide Vxgpe egress 
tunnel information.

Regards,

Brdy

-----Original Message-----
From: 。。。 
<[email protected]<mailto:%3d%3futf-8%3fq%3f%3de3%3d80%3d82%3de3%3d80%3d82%3de3%3d80%3d82%3f%3d%20%[email protected]%3e>>
To: Sfc-dev 
<[email protected]<mailto:sfc-dev%20%[email protected]%3e>>
Subject: [sfc-dev] nsh
Date: Mon, 6 Mar 2017 18:00:04 +0800

hello,
   This is a flow:
   cookie=0x0, duration=2010.659s, table=0, n_packets=31,n_bytes=2631,
     idle_age=753,priority=1000,tcp,in_port=1,nw_src=192.168.2.0/24,
     nw_dst=192.168.2.0/24,tp_dst=80 
actions=load:0xc0a80114->NXM_NX_TUN_IPV4_DST 
[],set_nsp:0x2c,set_nsi:255,set_nshc1:0x1,set_nshc2:0x2,set_nshc3:0x3,set_nshc4:0x4,output:10

    I don't know what nshc1、nshc2、nshc3 and nshc4 are doing ,and when to use 
them.

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