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[Contrail] Troubleshooting command - get tap interface name from vmi uuid on compute node

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Article ID: KB35225 KB Last Updated: 08 Nov 2019Version: 1.0
Summary:

This article explains the command for finding the tap interface name on a compute when only uuid for the VMI is available, using vrouter agent REST API. 

Solution:

Curl can be used to connect to  http://<host or ip>:9091/port/uuid to get the most useful information related to VMI, where 9091 is REST API port for vrouter agent.

In the Example below, the  tap interface name corresponding to uuid b89d36aa-1f2d-4047-89e9-b7dcbeb287db is tapb89d36aa-1f

#  curl http://localhost:9091/port/b89d36aa-1f2d-4047-89e9-b7dcbeb287db | python -mjson.tool
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   411  100   411    0     0  63455      0 --:--:-- --:--:-- --:--:-- 68500
{
    "display-name": "vm_internal",
    "id": "b89d36aa-1f2d-4047-89e9-b7dcbeb287db",
    "instance-id": "55ce44cc-640d-4ec6-b1de-c60c320a1f2b",
    "ip-address": "192.168.10.3",
    "ip6-address": "::",
    "mac-address": "02:b8:9d:36:aa:1f",
    "rx-vlan-id": 65535,
    "system-name": "tapb89d36aa-1f",
    "tx-vlan-id": 65535,
    "type": 0,
    "vm-project-id": "5967884b-13bc-4c97-85dd-a22ce022ef46",
    "vn-id": "a4e47ab2-93f0-4741-b941-4faa4731e815"
}
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