[chassis][pytest fails] test_snmp_interfaces failed because of Interface not found in SNMP facts

[ysmanman]

Topo: t2
Failure: AssertionError: Interface not found in SNMP facts

@pytest.mark.bsl
def test_snmp_interfaces(localhost, creds_all_duts, duthosts, enum_rand_one_per_hwsku_hostname, enum_asic_index):
    """compare the snmp facts between observed states and target state"""
    duthost = duthosts[enum_rand_one_per_hwsku_hostname]
    if duthost.is_supervisor_node():
        pytest.skip("interfaces not present on supervisor node")
    hostip = duthost.host.options['inventory_manager'].get_host(duthost.hostname).vars['ansible_host']

    namespace = duthost.get_namespace_from_asic_id(enum_asic_index)
    config_facts  = duthost.config_facts(host=duthost.hostname, source="persistent", namespace=namespace)['ansible_facts']
    snmp_facts = get_snmp_facts(localhost, host=hostip, version="v2c", community=creds_all_duts[duthost]["snmp_rocommunity"], wait=True)['ansible_facts']

    snmp_ifnames = [ v['name'] for k, v in snmp_facts['snmp_interfaces'].items() ]
    print snmp_ifnames

    # Verify all physical ports in snmp interface list
    for _, alias in config_facts['port_name_to_alias_map'].items():

> assert alias in snmp_ifnames, "Interface not found in SNMP facts."
E AssertionError: Interface not found in SNMP facts.

_ = 'Ethernet-Rec0'
alias = u'Recirc0/0'
config_facts = {'BGP_NEIGHBOR': {'10.0.0.101': {'admin_status': u'up', 'asn': u'65011', 'holdtime': u'10', 'keepalive': u'3', ...}, '...alhost': {'asic_name': u'Asic0', 'bgp_asn': u'65100', 'buffer_model': u'traditional', 'cloudt
ype': u'None', ...}}, ...}
creds_all_duts = {<MultiAsicSonicHost> cmp210: {'ansible_become_pass': 'password', 'ansible_ssh_pass': 'arastra', 'ansible_ssh_user': '... &a
pos;password', 'ansible_ssh_pass': 'arastra', 'ansible_ssh_user': 'root', 'bgp_slb_passive_range': '10.255.0.0/25', ...}}
duthost = <MultiAsicSonicHost> cmp210-4
duthosts = <tests.common.devices.duthosts.DutHosts object at 0x7f36027f8510>
enum_asic_index = None
enum_rand_one_per_hwsku_hostname = 'cmp210-4'
hostip = '10.240.76.58'
k = '125'
localhost = <tests.common.devices.local.Localhost object at 0x7f36014a10d0>
namespace = None
snmp_facts = {'ansible_all_ipv4_addresses': [], 'ansible_sysCachedMemory': 1024424, 'ansible_sysTotalBuffMemory': 169208, 'ansible_sysTotalFreeMemery': 11132844,
...}
snmp_ifnames = [u'Ethernet39/1', u'eth0', u'Ethernet40/1', u'Ethernet34/1', u'Ethernet16/1', u'Ethernet30/1', ...]
v = {'adminstatus': u'up', 'cpfcIfIndications': u'0', 'cpfcIfRequests': u'0', 'description': u'ARISTA22T1:Ethernet1&ap
os;, ...}

Description

Steps to reproduce the issue:
1.
2.
3.

Describe the results you received:

Describe the results you expected:

Additional information you deem important:

**Output of `show version`:**

```
(paste your output here)
```

**Attach debug file `sudo generate_dump`:**

```
(paste your output here)
```

[abdosi]

cc @SuvarnaMeenakshi

[sanmalho-git]

FYI - similar to #5157 this might be because of sonic-net/sonic-snmpagent#242