topic Re: GraphiQL doesn't give a correct list of VLANs ID in ExtremeCloud IQ- Site Engine Management Center

GraphiQL doesn't give a correct list of VLANs ID

Nealo — Thu, 17 Oct 2019 14:59:47 GMT

Hello,

I’ve been trying to get a list of the VLANs on a VSP device.

The device is a VSP-8404 with 6.1.6.0 firmware, and the XMC version is 8.2.4.55.

I know of two ways to get them.

The first one would be to send a CLI command with emc_cli, and get the output, then filter it to get a list.

cli_output = emc_cli.send("show vlan basic").getOutput().encode('ascii', 'ignore')

The second one is using emc_nbi and sending a query to get the VLANs ID

var_query = '''query{network{device(ip: "DeviceIP"){deviceData{vlans{vid}}}}}'''
var_result = emc_nbi.query(var_query)
vlans_id = var_result['network']['device']['deviceData']['vlans']

But, I noticed that using NBI doesn’t give me the same result as using CLI.

With CLI, I get this list : 1, 2, 49, 170, 180, 190, 4049, 4051, 4052

With NBI, I get this list : 1, 2, 49, 170, 180, 666, 4049

The NBI is not correct, as I don’t get the 190, 4051 and 4052, and it adds the 666.

I don’t understand why this difference is present. Is there something I’m doing wrong ?

Thanks a lot for the help

Re: GraphiQL doesn't give a correct list of VLANs ID

Kurt_Semba — Thu, 17 Oct 2019 15:35:59 GMT

Hi Nealo,

those two methods retrieve data from two different sources:

emc_cli: queries the switch
emc_nbi: queries XMC

The question now is: why does XMC not have the correct list of VLANs for that switch?

Re: GraphiQL doesn't give a correct list of VLANs ID

Nealo — Thu, 17 Oct 2019 15:53:29 GMT

Hi Kurt,

As both queries’ sources are different, I guess we can say that as emc_cli queries the switch, it is the correct one ?

And I don’t know why XMC doesn’t have the correct list of VLANs.

I checked with either ERS or VSP, with different firmware versions, the list I get with NBI is never correct.

Is there something I can do to help ?

Re: GraphiQL doesn't give a correct list of VLANs ID

Kurt_Semba — Thu, 17 Oct 2019 16:00:45 GMT

I cannot help with why XMC doesn’t retrieve the full, correct list of VLANs from those devices. Maybe someone else reading this can? But yeah, the emc_cli will give you the definitive answer on which VLANs actually exist on a switch since it is executing this CLI command on that switch.

Re: GraphiQL doesn't give a correct list of VLANs ID

rbrt — Fri, 18 Oct 2019 04:01:58 GMT

Hey everyone,

I had the same problem with the NBI and, together with GTAC, found out that refreshing the device with a mutation and querying the right context within the NBI solves it - at least for EXOS and EOS. Try this (replace the IP with the management IP of the switch in question):

mutation {
  network {
    rediscoverDevices(input: {devices: [{ipAddress: "10.0.0.1"}]}) {
      status
      message
    }
  }
}

After firing this mutation, wait for 15 minutes (or check the Operations view) and try the following GraphiQL query (again, replace the IP).

query {
  network {
    deviceVlans(ip: "10.0.0.1") {
      name
      vid
      primaryIp
      netmask
      ipForward
    }
  }
}

See https://link.medium.com/m5yqUU15y0 for an in-depth story on that topic.

Re: GraphiQL doesn't give a correct list of VLANs ID

Nealo — Fri, 18 Oct 2019 14:19:10 GMT

Thanks a lot for providing a solution BCN-rbrt !

By any chance, do you know what a mutation does ? Does it change anything on the device, or something like that ?

Because, I’d like to be sure it doesn’t affect the network before implemanting a workflow that uses a mutation.

Re: GraphiQL doesn't give a correct list of VLANs ID

rbrt — Fri, 18 Oct 2019 14:58:36 GMT

The mutation above just triggers a refresh device within XMC, so no changes are done to either the device or XMC.

Re: GraphiQL doesn't give a correct list of VLANs ID

Nealo — Fri, 18 Oct 2019 18:16:59 GMT

I have a question about that request.

The output is different if I use

network {deviceVlans {vid or

network {device {deviceData {vlans {vid

Shouldn’t both give the same result ?

Thanks

Re: GraphiQL doesn't give a correct list of VLANs ID

rbrt — Fri, 18 Oct 2019 18:50:22 GMT

There is a lengthy, open GTAC case regarding API behaviour, which I condensed in the article I shared above. To summarize it for the context question: The API is still in development and deviceVlans is the right context to use for now. Out of the case, from Engineering:

In a nutshell, the query is for deviceData which internally is cached mainly for provisioning/ZTP and should not technically be used for reading device info

As far as I know there is a CR to remove the deviceData/vlans context from the GraphQL API, targeted for XMC 8.4 or 8.5. So this issue will be “solved” soon.

Re: GraphiQL doesn't give a correct list of VLANs ID

Nealo — Fri, 18 Oct 2019 19:33:16 GMT

Thanks a lot for all those information !