Nav-users July 2019

nav-users@lister.sikt.no

3 participants
4 discussions

Announcement: NAV 4.9.7 packaged for Debian 10 (Buster)
by Morten Brekkevold 01 Aug '19

01 Aug '19

Hi everyone, this is a two-fold announcement: 1. We have, as of today, published a NAV 4.9.7 package for Debian 10 (Buster) in our regular APT repository [1]. 2. As previously mentioned, we are now discontinuing support for the Debian 8 (Jessie) line of NAV packages. There will be no new updates for this outdated platform from our side. There is, however, one caveat to using the NAV package on Debian 10: If you want to serve both the NAV web UI and Graphite-web from the same server, you cannot achieve this on Debian 10 using the regular Apache + mod_wsgi method for both applications. Debian 10 ships with a graphite-web package that runs on Python 3, while NAV 4.9 does not support Python 3 (we expect the next feature release to run on Python 3). mod_wsgi cannot be made to serve both Python versions on the same Apache server - you will have to select a Python-version specific mod_wsgi package. For this reason, the virtual appliance has not yet been updated to Debian 10. For our production deployments, we serve up NAV and Graphite-web using a uWSGI application server, and use Apache + *mod_uwsgi* as a front to provide TLS and serving of static file resources. This works fine on Debian 10, as each uWSGI application instance is an independent process. I suspect I'll be working on updating the appliance based on our production deployment configs of uWSGI. Hopefully, we can hopefully provide some config examples soon, for those who are interested in building their own deployments (of course, if you are already deploying Graphite on a separate server, this is a non-issue for you). [1] https://nav.uninett.no/install-instructions/#debian -- mvh Morten Brekkevold Uninett

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New Install Issues
by Brian Mock 31 Jul '19

31 Jul '19

Hello, We are currently trying to set up a new installation of NAV (4.9.7). I have imported all of our devices and locations but am experiencing some issues. Some of our devices have interfaces that are showing wildly inaccurate data. It's mostly on any ten gig interfaces but also on a few gig interfaces but they're showing up to 15Tbps of traffic when in reality they're pushing far less than that and the graphs are very broken (see attached screenshots). Most ports on the same devices report properly so it's just a few isolated interfaces. The other issue we're running into is devices not showing linked to their neighbors. I tried working through the troubleshooting steps in the docs but the devices don't show up under unrecognized neighbors. On the devices however they show up in the ARP/CAM tables. We do have some links that don't support CDP but NAV should still be building these neighbor relationships through the ARP/CAM tables correct? Thanks for any assistance that you can provide! Regards, Brian Mock Unwired Broadband

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Getting the ARP/Neighbors from Cisco ASA to NAV?
by Martin Burman 24 Jul '19

24 Jul '19

Hi We successfully use NAV for keeping track of devices but more often to find out which switchport a specific computer is attached to, either by searching for an IP address or a MAC address and it works great. We also have a lot of users directly attached to Cisco ASAs and these boxes does not give away their ARP/Neighbor cache via SNMP. The obvious first question is: has anyone successfully solved this already? Otherwise a "sh arp/sh ipv6 neigh" gives a parseable output and I assume this is the way to go via Expect or similar: Asa> sh ipv6 neighbor IPv6 Address Age Link-layer Addr State Interface fe80::6db1:8675:5895:8db1 423 001d.d8b7.1ce3 STALE ifname Is there a safe way to import this kind of data to NAV? Or any documentation hints that kicks me into the appropriate direction? I assume there are logic that updates existing mac addresses and creating new ones when needed and such and I don't want to ruin our installation. The second idea is to run some homebrewed snmp server that runs the "sh arp" in the back end and formats the output like a L3 switch would do, if that's the suggested way to go I would appreciate a decent oneliner with snmpwalk or similar that runs against a Cisco L3 switch (6500 or 6800) so I can compare the output I need to create. Thanks in advance and thanks a lot for a great piece of software! Martin Burman ---------- Göteborgs universitet IT-enheten +46 766-18 5982

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NAV and Juniper virtual chassis
by Djuro Garvanovic 24 Jul '19

24 Jul '19

Hi I recently stumbled on your product while I was searching for a good network monitoring tool. So I started a POC with Debian package but got some problems with Graphite, and had to reverted to the appliance. Now that its running, I’m impressed over functions built in, especially the network auto mapping. But there is one thing I don’t know how to handle. We are mainly using Juniper EX4200, EX 3200 and EX2200 switches. Our Juniper EX4200 switches are set up as virtual chassis (stacked switches), and they all have the same ip address. The problem is that the switches, although they are in the same chassis, they are placed in different “rooms” a ring around our campus acting as distribution switches. Se config: dgc@MMACOR01> show virtual-chassis Virtual Chassis ID: b0c6.9a6f.7500 Virtual Chassis Mode: Enabled Mstr Mixed Neighbor List Member ID Status Serial No Model prio Role Mode ID Interface 0 (FPC 0) Prsnt BM0209493141 ex4200-24t 250 Master* N 1 vcp-0 7 vcp-255/1/1 1 vcp-1 1 (FPC 1) Prsnt BM0209505602 ex4200-24t 140 Linecard N 0 vcp-0 4 vcp-255/1/1 0 vcp-1 2 (FPC 2) Prsnt BR0218490227 ex4200-24f 130 Linecard N 3 vcp-0 5 vcp-255/1/2 3 vcp-1 3 (FPC 3) Prsnt BR0218490131 ex4200-24f 120 Linecard N 2 vcp-0 9 vcp-255/1/2 2 vcp-1 4 (FPC 4) Prsnt BM0209493198 ex4200-24t 210 Backup N 5 vcp-0 1 vcp-255/1/1 5 vcp-1 5 (FPC 5) Prsnt BM0209485774 ex4200-24t 200 Linecard N 4 vcp-0 2 vcp-255/1/1 4 vcp-1 6 (FPC 6) Prsnt BR0209485019 ex4200-24f 190 Linecard N 7 vcp-0 8 vcp-255/1/1 7 vcp-1 7 (FPC 7) Prsnt BR0209484982 ex4200-24f 180 Linecard N 6 vcp-0 0 vcp-255/1/1 6 vcp-1 8 (FPC 8) Prsnt BR0213155003 ex4200-24f 170 Linecard N 9 vcp-0 6 vcp-255/1/1 9 vcp-1 9 (FPC 9) Prsnt BR0214421949 ex4200-24f 160 Linecard N 8 vcp-0 3 vcp-255/1/1 8 vcp-1 Member ID for next new member: None {master:0} dgc@MMACOR01> And picture [cid:image002.png@01D52A71.D4537D10] It looks like I only can add a ip address once Is there a way to add the other MMACOR01 switches so I can see them, even if they have the same IP? Vänliga hälsningar / Best regards Djuro Garvanovic IT Infrastruktur Nätverk och kommunikation +46 40 323710 djuro.garvanovic(a)pagen.se<mailto:dgc@pagen.se> http://www.linkedin.com/in/djuro Pågen AB, Box 8143, SE-200 41 Malmö Besöksadress: Kopparbergsgatan 19, Grind G5 www.pagen.se<http://www.pagen.se/> www.facebook.com/pagensverige<http://www.facebook.com/pagensverige> [cid:image001.png@01D0B4AF.B24D9610]

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Nav-users July 2019