SONIC_CLI_IFACE_MODE=alias show ip route returns output in json format

[sanmalho-git]

Description

If we set interface naming mode to 'alias', and run the 'show ip route' command, the output is shown in json format. If we don't set SONIC_CLI_IFACE_MODE or set it to 'default', then the output is not in JSON format

Because of this, sonic-mgmt test test_show_ip_route_v4(https://github.com/Azure/sonic-mgmt/blob/master/tests/iface_namingmode/test_iface_namingmode.py#L921) and test_show_ip_route_v6 are failing when run in alias mode.

Steps to reproduce the issue:

1. Run the command ''SONIC_IFACE_CLI_MODE=alias show ip route 192.168.1.1'

Describe the results you received:

The output of 'SONIC_IFACE_CLI_MODE=alias show ip route 192.168.1.1 is:

admin@vlab-08:~$ SONIC_CLI_IFACE_MODE=alias show ip route 192.168.1.0
{
  "0.0.0.0\/0":[
    {
      "prefix":"0.0.0.0\/0",
      "protocol":"static",
      "vrfId":0,
      "vrfName":"default",
      "distance":200,
      "metric":0,
      "table":254,
      "internalStatus":0,
      "internalFlags":65,
      "internalNextHopNum":1,
      "internalNextHopActiveNum":0,
      "uptime":"20:39:09",
      "nexthops":[
        {
          "flags":0,
          "ip":"10.250.0.1",
          "afi":"ipv4",
          "weight":1
        }
      ]
    },
    {
      "prefix":"0.0.0.0\/0",
      "protocol":"bgp",
      "vrfId":0,
      "vrfName":"default",
      "selected":true,
      "destSelected":true,
      "distance":20,
      "metric":0,
      "installed":true,
      "table":254,
      "internalStatus":16,
      "internalFlags":8,
      "internalNextHopNum":2,
      "internalNextHopActiveNum":2,
      "uptime":"20:39:09",
      "nexthops":[
        {
          "flags":3,
          "fib":true,
          "ip":"10.0.0.1",
          "afi":"ipv4",
          "interfaceIndex":75,
          "interfaceName":"PortChannel0002",
          "active":true,
          "weight":1
        },
        {
          "flags":3,
          "fib":true,
          "ip":"10.0.0.5",
          "afi":"ipv4",
          "interfaceIndex":76,
          "interfaceName":"PortChannel0005",
          "active":true,
          "weight":1
        }
      ]
    }
  ]
}

Describe the results you expected:

Expect the output to be the same format as with SONIC_IFACE_CLI_MODE set to default

admin@vlab-08:~$ SONIC_IFACE_CLI_MODE=default show ip route 192.168.1.1
Routing entry for 0.0.0.0/0
  Known via "bgp", distance 20, metric 0, best
  Last update 20:39:14 ago
  * 10.0.0.5, via PortChannel0005
  * 10.0.0.1, via PortChannel0002

Routing entry for 0.0.0.0/0
  Known via "static", distance 200, metric 0
  Last update 20:39:14 ago
  * 10.250.0.1 inactive

Output of show version:

On a multi-asic KVM

admin@vlab-08:~$ show version

SONiC Software Version: SONiC.official_masic_test.24903-74c2532a
Distribution: Debian 10.10
Kernel: 4.19.0-12-2-amd64
Build commit: 74c2532a
Build date: Thu Jul 22 03:49:09 UTC 2021
Built by: AzDevOps@sonic-build-workers-000IRK

Platform: x86_64-kvm_x86_64-r0
HwSKU: msft_four_asic_vs
ASIC: vs
ASIC Count: 4
Serial Number: None
Model Number: None
Hardware Revision: None
Uptime: 15:42:29 up 12 days, 20:44,  1 user,  load average: 0.30, 0.16, 0.11

Output of show techsupport:

(paste your output here or download and attach the file here )

Additional information you deem important (e.g. issue happens only occasionally):