February 2017 - Test - lists.nanog.org

OSS Netflow that can use EngineID
by Eric Germann 23 Feb '17

23 Feb '17

Colleagues, Before I go down a source code path, I wanted to get your input. I have some Linux routers I’ve built that use lots of GRE tunnels. I use ipt-netflow to export flow traffic to a collector. The issue is it seems to randomly pick an interface address and export from that. If we add a tunnel interface, it can randomly switch to that interface for exporting. I’ve played with nfsen for collection/display, but it defines a source based on IP. Since the source IP of the exporter can change, this poses a problem ipt-netflow supports EngineID, but not a specific export IP. nfsend supports a specific export IP, but not EngineID. It seems like the solution is EngineID since we could wire it down. Does anyone know of a solution to that will pull in based on EngineID and separate it that way before I chomp in to source code of one or the other patch it to support the other. TIA, EKG

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Juniper QFX port VLAN statistics via SNMP - is it possible?
by Stanislaw 23 Feb '17

23 Feb '17

Hi everybody, Is it possible to obtain switched traffic statistics in a port+vlan aspect via SNMP on Juniper QFX switches? For example, Extreme switches have a 'vlan monitor' feature: configure ports all monitor vlan <vlan_name> then its counters are available by OID .1.3.6.1.4.1.1916.1.2.8.2.1.8 and .1.3.6.1.4.1.1916.1.2.8.2.1.7 Does anyone know if Juniper has a similar feature?

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Comcast IPv6 PD Centos
by Harry Hoffman 23 Feb '17

23 Feb '17

Hi Folks, I'm wondering if anyone has successfully configured prefix delegation on Comcast's service using CentOS 7 as a router/firewall. I'm trying to help troubleshoot a configuration and I can't find anything current via Google. Cheers, Harry

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Any Github Experts online ?
by Bob Evans 22 Feb '17

22 Feb '17

Hello NANOGers, I have one customer that claims that 2 out of 17 downloads using the git command on github's service are slow and poor on our network when compared to others. However, when not using the git command , but using a simple web page link to a large zipped file from github, its always nice and fast. Using the git command 8% of the time being slow is unacceptable. Github just doesnt responds lethargically at best. BTW, have you seen how many hex digits a github ticket number is ? Of course Github says try a different ISP...Customer tries to tell me comcast is better ! What ! I dont believe it. No help from Github NOC - we have asked and asked... And we peer with Github and for some reason they do not transmit the Prefixes of the IP range that the customer uses for the git command. github.com resolve IPv4 is not in the prefix list. So the exit is transits. I need more clues. Is it the resources the git command uses when checking files for dates etc ? Thank You Bob Evans CTO

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test, please disregard
by Dave Temkin 22 Feb '17

22 Feb '17

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Verizon Wireless Back-haul Transport
by Mark Stevens 22 Feb '17

22 Feb '17

Good afternoon all, If there is a Verizon wireless back-haul transport engineer on the list that can reach out to me offline, it would be great. Topic: bad trunks in the New Brunswick NJ Tandem office. Thanks Mark

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Juniper Advertise MED on EBGP session.
by Leo Bicknell 22 Feb '17

22 Feb '17

I tried to pull an old trick out of my playbook this morning and failed. I'd like to advertise BGP Metrics on an EBGP session, specifically the existing internal metrics. I know how to do this on a Cisco, but I tried on a Juniper and it seems to be impossible. I can set a metric in a policy, or put a default metric on the session as a whole, or even set it to IGP. But none of those are what I want. I want the existing metrics advertised as-is, just like would be done over an IBGP session. After an hour of reading documentation and trying a few things, I'm starting to think it may be impossible on JunOS. Anyone have a tip or trick? -- Leo Bicknell - bicknell(a)ufp.org PGP keys at http://www.ufp.org/~bicknell/

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Re: Juniper QFX port VLAN statistics via SNMP - is it possible?
by Kody Vicknair 22 Feb '17

22 Feb '17

I haven't tried to do anything like this on ours. Getting a copy of the juniper qfx mib would be a good start. Kody Vicknair Network Engineer [cid:image9d67f5.JPG@a30b92f4.4698f933] <http://www.rtconline.com> Tel: 985.536.1214 Fax: 985.536.0300 Email: kvicknair(a)reservetele.com Web: www.rtconline.com Reserve Telecommunications 100 RTC Dr Reserve, LA 70084 Disclaimer: The information transmitted, including attachments, is intended only for the person(s) or entity to which it is addressed and may contain confidential and/or privileged material which should not disseminate, distribute or be copied. Please notify Kody Vicknair immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. Kody Vicknair therefore does not accept liability for any errors or omissions in the contents of this message, which arise as a result of e-mail transmission. On Feb 22, 2017 3:34 AM, Stanislaw <me(a)nek0.net> wrote: Hi everybody, Is it possible to obtain switched traffic statistics in a port+vlan aspect via SNMP on Juniper QFX switches? For example, Extreme switches have a 'vlan monitor' feature: configure ports all monitor vlan <vlan_name> then its counters are available by OID .1.3.6.1.4.1.1916.1.2.8.2.1.8 and .1.3.6.1.4.1.1916.1.2.8.2.1.7 Does anyone know if Juniper has a similar feature?

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Updating Geolocation of /24 within corporate /16
by David Sotnick 21 Feb '17

21 Feb '17

Hi NANOG, You have given good advice on updating IP Geolocation data in the past, including visiting 'www.google.com' from a mobile device and selecting "use exact location [from GPS]". This worked out well for us a few years ago for a single IP which we were NATting out of in a new geographic location. Now we are in a position where we have been assigned site-local /24 (out of the corporation's larger /20 space) networks for a couple of locations and I'm wondering how I go about updating IP Geolocation data to note that two /24 networks are no longer at the Corporate HQ location. I understand that when users first start using these site-specific /24 networks, they will be lumped in with the larger /20 space as far as their geolocation goes, but besides the Google/GPS method, is there a cleaner/better way to do this? Do Geolocation services use SWIP data? Should I have the /24s have separate SWIP data noting the geo location? I'd love a place to be able to say: "This /24 is at this geoloc; this /24 is at this geoloc; and the corporate /20 remains where it always has been." Many thanks for your insights in this matter, -Dave

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WWV Broadcast Outages
by Sean Donelan 21 Feb '17

21 Feb '17

If any network operators still use WWV for time synchronization. Due to an electrical up-grade, Radio Station WWV will be off the air on all frequencies on February 21 and 22, 2017. The outages will occur between 7:00 AM and 5:00 PM Mountain Standard Time, and will not exceed 8 hours in duration each day. https://www.nist.gov/pml/time-and-frequency-division/time-services/wwv-broa…

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