[Edgecore SONiC] FRRouting and config initialization 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. [Mandatory] FRR is an routing protocol suite for Linux platform.  It has other config files instead of /etc/sonic/config_db.json.  However, default config_db.json is incorrect and incomplete. Please refer to the following procedures to initialize FRRouting and config

Initialize FRR and config (for Restriction #1)

Step 1:  Edit /etc/sonic/config_db.json

• Add // to comment out this object "BGP_NEIGHBOR": { }

• Add "docker_routing_config_mode": "split" to "DEVICE_METADATA" as shown below

• Remove the surplus setting "bgp_asn": "65100" from "DEVICE_METADATA", since "split" mode won't read BGP setting from /etc/sonic/config_db.json. 

{
    "//BGP_NEIGHBOR": {
        "10.0.0.1": {
            "asn": "65200",
            "holdtime": "180",
            "keepalive": "60",
            "local_addr": "10.0.0.0",
            "name": "ARISTA01T2",
            "nhopself": 0,
            "rrclient": 0
        },
        omitted...
    },
    omitted...
    "DEVICE_METADATA": {
        "localhost": {
        "bgp_asn": "65100",
        "hostname": "sonic",
        "hwsku": "Accton-AS5835-54X",
        "mac": "80:a2:35:d2:47:b5",
        "platform": "x86_64-accton_as5835_54x-r0",
        "type": "LeafRouter",
        "docker_routing_config_mode": "split"
        }
    },
   omitted...
}

Step 2. Reload config or power cycle the switch

admin@sonic:~$ sudo config reload -y

Step 3.  Verify the result

Check current configuration

admin@sonic:~$ show runningconfiguration bgp
Building configuration...

Current configuration:
!
frr version 7.2.1-sonic
frr defaults traditional
hostname sonic
service integrated-vtysh-config
!
route-map RM_SET_SRC permit 10
 set src 10.1.0.1
!
ip protocol bgp route-map RM_SET_SRC
!
line vty
!
end
admin@sonic:~$

Caution: If the result is failed, please go back to Step 1 and redo these steps.