Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

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Hi Jethro / all

I implemented the SSH collector for AOS-CX, and arpnip is now working for these devices. Thanks for your work on this.
However, I see that this also causes macsuck to fail for the same devices, because it is being attempted by SSH also.

Am I missing something in my configuration, or do I need to choose between having arpnip or macsuck working for Aruba AOS-CX devices? It seems I can have either but not both at present?

Best regards,

Paul Mackie

GEA INTERNAL

From: Muris <alc...@gm...>
Sent: 24 September 2025 10:08
To: Jethro Binks <jet...@st...>; Nick Nauwelaerts <nic...@aq...>; Oliver Gorwits <ol...@cp...>
Cc: Cuttler, Brian R via netdisco-users (HEALTH) <net...@li...>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

Hi JR Binks, thanks for contributing this addon for ArubaOS-CX, there is 1 problem with it is that it doesnt work in environments with multiple vrfs
Can i make a suggestion to change this line -
$expect->send("show arp\n");
to
$expect->send("show arp all-vrfs\n");
This way it works accross all VRFs present on the switch.
I did test it modifying to this and it does work correctly in mutiple VRF's and grabbing the arps.

Regards,
Muris

From: Jethro Binks <jet...@st...>
Date: Monday, 25 August 2025 at 04:15
To: Nick Nauwelaerts <nic...@aq...>, Oliver Gorwits <ol...@cp...>
Cc: "Cuttler, Brian R (HEALTH) via netdisco-users" <net...@li...>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

Mmm yes indeed, the "arpnip::nodes" comes from the Configuration documentation ("The action key allows you to restrict credentials to certain actions or even stages of actions on the remote device, such as ARP table gathering (arpnip::nodes)", but I've tried with action: arpnip and no action at all and the effect is the same.

In fact if I introduce a deliberate syntax error into ArubaCX.pm, or alternatively set a nonsense platform: ArubaCXXX, it makes no difference either, so it's like this is never properly trying.  It does use SNMP to gather Arpnip::Subnets (correctly).

I have to run an older version (2.076005) because of other issues just now, so it's entirely possibly I'm hitting an issue already resolved, although I've been through the notes and a code diff and can't spot anything too relevant.

Aha!

I moved my cli driver section from the bottom of the device_auth credentials to the top, and it now hits the syntax error I introduced.
So now I have:

[54908] 2025-08-24 15:03:43 debug 130.159.1.52 54908 arpnip()
[54908] 2025-08-24 15:03:47 debug ⬅ (done) Gathered arp caches from 130.159.1.52
[54908] 2025-08-24 15:03:47 debug ⮕ worker Arpnip::Nodes p100
[54908] 2025-08-24 15:03:47 debug ⬅ (info) skip: namespace passed at higher priority
[54908] 2025-08-24 15:03:47 debug ⮕ worker Arpnip::Subnets p100

Although it didn't actually get any:

[54908] 2025-08-24 15:03:48 debug  resolving 0 ARP entries with max 50 outstanding requests
But that allowed me to finally check and fix the script which literally took 2 mins to fix the regexp, and now it all works.

I have added to the discussion: https://github.com/netdisco/netdisco/discussions/869

And also made some references between the various other Aruba-related issues that touch on naming problems in various respects.

Jethro.

.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .

Jethro R Binks, Network Manager,

Information Services Directorate, University Of Strathclyde, Glasgow, UK

The University of Strathclyde is a charitable body, registered in Scotland, number SC015263.

________________________________
From: Nick Nauwelaerts <nic...@aq...>
Sent: 24 August 2025 1:34 PM
To: Jethro Binks <jet...@st...>; Oliver Gorwits <ol...@cp...>
Cc: Cuttler, Brian R (HEALTH) via netdisco-users <net...@li...>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

all the examples i see just use arpnip instead of arpnip::nodes

perhaps change your config action to plain "arpnip" & make sure there's an arpnip function in your ssh module

________________________________
From: Jethro Binks <jet...@st...>
Sent: Sunday, August 24, 2025 12:39
To: Oliver Gorwits <ol...@cp...>
Cc: Cuttler, Brian R (HEALTH) via netdisco-users <net...@li...>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

Thanks Oliver.

Any thoughts on why I can't get the SSHCollector script to trigger though ("(info) skip: driver or action not applicable"),  ND2_LOG_PLUGINS=1 providing no further clues.

While I potentially have a workaround now using that -p option, that's still going to need work and is still < SSHCollector ( < SNMP::Info ipNetToPhysicalTable).  It must be something simple but I can't see it.

Jethro.

.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .

Jethro R Binks, Network Manager,

Information Services Directorate, University Of Strathclyde, Glasgow, UK

The University of Strathclyde is a charitable body, registered in Scotland, number SC015263.

________________________________
From: Oliver Gorwits <ol...@cp...>
Sent: 22 August 2025 10:02 PM
To: Jethro Binks <jet...@st...>
Cc: Cuttler, Brian R (HEALTH) via netdisco-users <net...@li...>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

Hi Jethro,

Ah you're right the API wiki page has Perl syntax (not JSON) because the mojolicious library will convert it. The netdisco-do man page is misleading.

It actually means to refer to the API spec itself which is here: https://netdisco2-demo.herokuapp.com/swagger-ui/?url=/swagger.json#/Objects/put_api_v1_object_device__ip__arps

I'll see if we can make netdisco-do doc clearer.

By the way, glad to see -p option being used. In the next major version this is changed to be "-e '@/path/to/file'" or you can pipe it in with "-e '@-'". Just to make it a bit cleaner across different commands.

regards
oliver.

On Fri, 22 Aug 2025 at 13:32, Jethro Binks <jet...@st...<mailto:jet...@st...>> wrote:
Hey,

I've tried it with and without the action:.

Adding env ND2_LOG_PLUGINS=1 provided no additional output here:

[35351] 2025-08-22 10:42:36 debug ⬅ (done) arpnip is able to run
[35351] 2025-08-22 10:42:36 debug //// EARLY \\\\ phase
[35351] 2025-08-22 10:42:36 debug ⮕ worker Arpnip::Nodes p0 "prepare common data"
[35351] 2025-08-22 10:42:36 debug //// MAIN \\\\ phase
[35351] 2025-08-22 10:42:36 debug ⮕ worker Arpnip::Nodes p1000000
[35351] 2025-08-22 10:42:36 debug ⬅ (info) skip: arp table data supplied by other source
[35351] 2025-08-22 10:42:36 debug ⮕ worker Arpnip::Nodes p200
[35351] 2025-08-22 10:42:36 debug ⬅ (info) skip: driver or action not applicable
[35351] 2025-08-22 10:42:36 debug ⮕ worker Arpnip::Nodes p100
[35351] 2025-08-22 10:42:36 debug snmp reader cache warm: [ipaddress]

But I didn't know about that, so I will remember it in future thanks.

Failing progress here, I took a look at doing it out-of-band, and then using:

    Submit arpnip results directly to Netdisco by putting the JSON data in a
    file and using the "-p" option (see API web docs for data format
    example):

     ~/bin/netdisco-do arpnip -d 192.0.2.1 -p /tmp/arp-table.json

Which also seems a more recent addition I'd not noticed before.  But while the API docs suggest the format for the JSON should be:

[
  { mac => "aa:bb:cc:dd:ee:ff", ip => "A.B.C.D" }
]

I had to write it such:

[
  { mac: "aa:bb:cc:dd:ee:ff", ip: "A.B.C.D" }
]

But it did work!  So that's another interim workaround perhaps.  Still icky.

J.

.  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .

Jethro R Binks, Network Manager,

Information Services Directorate, University Of Strathclyde, Glasgow, UK

The University of Strathclyde is a charitable body, registered in Scotland, number SC015263.

________________________________
From: Christian Ramseyer <ram...@ne...<mailto:ram...@ne...>>
Sent: 22 August 2025 12:54 AM
To: Jethro Binks <jet...@st...<mailto:jet...@st...>>; Cuttler, Brian R (HEALTH) via netdisco-users <net...@li...<mailto:net...@li...>>
Subject: Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

Hi!

On 21.08.2025 21:31, Jethro Binks wrote:
>      action: arpnip::nodes

Your config looks fine at a first glance except for I have never seen
action: used in device_auth... just as a wild guess maybe try without it?

You can also try ND2_LOG_PLUGINS=1 as env var to get some more output
from plugin and worker selection, maybe that helps.

Cheers
Christian
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Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again

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Re: [Netdisco] Trying to fetch arp entries from ArubaOSCX, again