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Today's Topics:
1. Re: auto-discovery (Oliver Gorwits)
--- Begin Message ---
Also good đđź I have patched and suggested both
On Thu, 12 Sep 2019 at 21:51, Ed Blom <[email protected]> wrote:
> On the homepage of netdisco you can input a device to discover, so once
> installed users need to be told to add a device, then hit discover. That
> would be nice ot know in the documentation
>
>
> On Thursday, September 12, 2019, 03:00:24 PM CDT, Oliver Gorwits <
> [email protected]> wrote:
>
>
> Thanks, that's a great suggestion for the docs!
>
> On Thu, 12 Sep 2019 at 13:38, Stuart Kendrick <[email protected]>
> wrote:
>
> OK, I donât have a coherent story to tell, can someone help me fill this
> out?
>
>
>
> I got distracted for a few days, returned to this thread ⌠and found that
> my Inventory is now populated with what I would expect, i.e. a quick glance
> suggests that Netdisco has found most if not all of my Devices
>
>
>
> - How does Netdisco get started? How does it find the first device to
> query using SNMP (from which it then starts examining CDP/FDP/LLDP tables
> to figure out where to go next)?
> - And does Netdisco use other techniques to find Devices? E.g.
> consult RIP / OSPF / EIGRP ⌠tables to find âneighborsâ?
>
>
>
> To answer your specific question: 10.1.2.3 is a Linux box (my desktop
> machine). It happens to run LLDPd ⌠and see its local Ethernet switch as a
> neighbor (although I would claim, with some doubt around the unreliability
> of my memory, that Inventory stayed empty for a day or two, even after I
> had manually pointed netdisco-do at it, to produce the output I posted).
>
>
>
> If I understand Dominik correctly, installing Netdisco involves the
> process described here https://metacpan.org/pod/App::Netdisco#Installation
> and then, in fact, one must run a netdisco-do (via CLI or GUI) to discover
> the first device ⌠and assuming that this first device can start walking
> the CDP/FDP/LLDP chain, then much progress will then occur.
>
>
>
> If this is the case, then I propose adding a âFirst Runâ section similar
> to the following:
>
>
>
> First Run
>
> After installing Netdisco for the first time, you must manually discover
> at least one device on your network. To do this, perform the following
> step:
>
> ~/bin/netdisco-do discover -D {name or IP address of a switch or router}
>
>
>
> Choose a device which speaks CDP, FDP, or LLDP and thus knows about its
> neighbors; Netdisco will then start following this chain of neighbors to
> discover the rest of your network
>
> *Upgrading from 2.x*
>
>
>
> --sk
>
>
>
>
>
>
>
> *From:* Oliver Gorwits <[email protected]>
> *Sent:* Monday, September 9, 2019 3:21 AM
> *To:* [email protected]
> *Subject:* Re: [Netdisco] auto-discovery
>
>
>
> *CAUTION:* This email originated from outside the Allen Institute. Please
> do not click links or open attachments unless you've validated the sender
> and know the content is safe.
> ------------------------------
>
> Hi Stuart
>
>
>
> I agree with Dominik. Looking a the logs from your earlier emails, these
> are relevant:
>
>
>
> [18523] 2019-09-08 11:22:21 debug [10.1.2.3:161
> <https://nam05.safelinks.protection.outlook.com/?url=http%3A%2F%2F10.1.2.3%3A161&data=02%7C01%7C%7Cf935151f10b04f49b06d08d7351381b7%7C32669cd6737f4b398bddd6951120d3fc%7C0%7C0%7C637036230234487769&sdata=6IplQxMxdhGRkCuOtYRjEvyau9rcCTXNhjugjBLNEgw%3D&reserved=0>]
> try_connect with ver: 2, new class: SNMP::Info::Layer3::NetSNMP, comm:
> <hidden>
>
>
>
> in the above line we see that the device is only being identified as a
> generic system, and results would be better if there were an SNMP::Info
> specific class for the device model (e.g. Layer3::C6500). Can you share the
> device/model being discovered?
>
>
> [18523] 2019-09-08 11:22:21 debug [10.1.2.3] interfaces - added 1 new
> interfaces
>
>
>
> Surprising that there is only one interface on this switch/router, or is
> it a server or VM?
>
> [18523] 2019-09-08 11:22:21 debug [10.1.2.3] neigh - neighbor protocols
> are not enabled
>
>
>
> And finally, here is where Dominik mentions the CDP/FDP/LLDP needing to be
> enabled. They are protocols for walking the network from device to device.
>
>
>
> Perhaps reading this will help:
> https://github.com/netdisco/netdisco/wiki/Troubleshooting#understanding-nodes-and-devices
> <https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnetdisco%2Fnetdisco%2Fwiki%2FTroubleshooting%23understanding-nodes-and-devices&data=02%7C01%7C%7Cf935151f10b04f49b06d08d7351381b7%7C32669cd6737f4b398bddd6951120d3fc%7C0%7C0%7C637036230234497761&sdata=xsgS6BNP%2FqaQY1GRhCaMnrEggfVYGU3VekQbdRzVajM%3D&reserved=0>
>
>
>
> Good luck!
>
>
>
> regards,
>
> oliver.
>
>
>
> On Mon, 9 Sep 2019 at 10:40, Mueller, Dominik <[email protected]>
> wrote:
>
> Hi Stuart,
>
> I think the problem is, that a Macwalk and Discoverall will not bring the
> desired outcome.
> You have to add at least one device which utilizes lldp (CDP, FDP, etc...)
> to autodiscover other devices.
>
> Otherwise you have to insert all devices in a crontab.
>
> Best regards
>
>
> Dominik MĂźller
>
>
>
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