[vpp-dev] Anybody knows how vpp classify table chaining works?

[Yang, Yi Y]

Hi, folks

I need to match two flows, ICMP and TCP, by vpp classify tables and sessions, 
here are my classify tables and classify sessions, I want to know in what case 
the packet will go to next table and in what case the packet will go to 
miss_next in table 0 and table 1, respectively? Thank you in advance.

{
    "vpp-classifier-state": {
        "classify-table": [
            {
                "name": "table1",
                "classifier-node": "l2-input-classify",
                "mask": 
"00:00:00:00:00:00:00:00:00:00:00:00:ff:ff:00:00:00:00:00:00:00:00:00:ff:00:00:ff:ff:ff:ff:ff:ff:ff:ff:00:00:ff:ff:00:00:00:00:00:00:00:00:00:00",
                "active_sessions": 1,
                "miss_next": "deny",
                "nbuckets": 2,
                "classify-session": [
                    {
                        "match": 
"00:00:00:00:00:00:00:00:00:00:00:00:08:00:00:00:00:00:00:00:00:00:00:06:00:00:c0:a8:02:00:c0:a8:02:00:00:00:00:50:00:00:00:00:00:00:00:00:00:00",
                        "hit_next": "nsh-classifier",
                        "opaque_index": "47168",
                        "advance": 0
                    }
                ],
                "skip_n_vectors": 0
            },
            {
                "name": "table0",
                "next_table": "table1",
                "classifier-node": "l2-input-classify",
                "mask": 
"00:00:00:00:00:00:00:00:00:00:00:00:ff:ff:00:00:00:00:00:00:00:00:00:ff:00:00:ff:ff:ff:ff:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00:00:00:00:00",
                "active_sessions": 1,
                "miss_next": "deny",
                "nbuckets": 2,
                "classify-session": [
                    {
                        "match": 
"00:00:00:00:00:00:00:00:00:00:00:00:08:00:00:00:00:00:00:00:00:00:00:01:00:00:c0:a8:02:00:c0:a8:02:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00",
                        "hit_next": "nsh-classifier",
                        "opaque_index": "47168",
                        "advance": 0
                    }
                ],
                "skip_n_vectors": 0
            }
        ]
    }
}

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