[Edgecore SONiC] SFLOW (sampled flow) Follow

Reference model:

• Switch model name:

- AS7726-32X

- AS7326-56X

- AS7816-64X

- AS5835-54X(T)

- AS4630-54PE

- AS9716-32D

- AS8000(Minipack)

- Wedge100BF-32X

• Edgecore SONiC version: 

- Edgecore-SONiC_20201123_130028_ec202006_74

- Edgecore-SONiC_20201229_070315_ec202006_101

- Edgecore-SONiC_20201229_070315_ec202006_bfn_65(Wedge100BF-32X)

Restriction:

1. sFlow is disabled by default.
2. It only supports two sFlow collectors.
3. The sFlow flow sampling is not taken effect unless you set the COPP rule correctly.

Topology:

Procedure :

Step 1: Make sure the COPP rule is correct in the SWSS container.

Access the SWSS container.

admin@sonic:~$ docker exec -it swss bash
root@sonic:/#

Checking the copp.json.j2, this file is at /usr/share/sonic/templates.

[
… omitted
   {
        "COPP_TABLE:trap.group.sflow": {
            "trap_ids": "sample_packet",
            "trap_action":"trap",
            "trap_priority":"1",
            "queue": "2",
            "meter_type":"packets",
            "mode":"sr_tcm",
            "cir":"1000",
            "cbs":"1000",
            "red_action":"drop",
            "genetlink_name":"psample",
            "genetlink_mcgrp_name":"packets"
         },
         "OP": "SET"
    }
]

Caution:  If you modify the copp.json.j2, please reboot the switch to activate it.

Step 2: Configure the IP address on the Ethernet0 ( refer to this article)

Step 3: Enable the sFlow.

admin@sonic:~$ sudo config sflow enable

Step 4: Add the sFlow collector.

admin@sonic:~$ sudo config sflow collector add test 192.168.2.2

Step 5: check sFlow.

admin@sonic:~$ show sflow

sFlow Global Information:
  sFlow Admin State:          up
  sFlow Polling Interval:     default
  sFlow AgentID:              default

  1 Collectors configured:
    Name: test                IP addr: 192.168.2.2UDP port: 6343

admin@sonic:~$ show sflow interface

sFlow interface configurations
+-------------+---------------+-----------------+
| Interface   | Admin State   |   Sampling Rate |
+=============+===============+=================+
| Ethernet0   | up            |            2500 |
+-------------+---------------+-----------------+
| Ethernet1   | up            |            2500 |
+-------------+---------------+-----------------+
| Ethernet2   | up            |            2500 |
+-------------+---------------+-----------------+
| Ethernet3   | up            |            2500 |
+-------------+---------------+-----------------+
...
omitted
...
+-------------+---------------+-----------------+
| Ethernet72  | up            |           10000 |
+-------------+---------------+-----------------+
| Ethernet76  | up            |           10000 |
+-------------+---------------+-----------------+