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RE: IPv6 Pain Experiment
by Scott Weeks 03 Oct '19

03 Oct '19

--- aaron1(a)gvtc.com wrote: From: "Aaron Gould" <aaron1(a)gvtc.com> Thank God for DNS ;) ------------------------------------ No, just Paul Mockapetris... :-) https://en.wikipedia.org/wiki/Paul_Mockapetris scott

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Spectrum (Charter) Fragmented UDP
by Phil Lavin 03 Oct '19

03 Oct '19

At some point over night on 30th September (i.e. the night going into 1st October), we saw a number of Spectrum (Charter) customers stop handling fragmented UDP packets. This has manifested itself in such that the phones of affected customers are no longer receiving UDP SIP INVITE packets which exceed whatever their WAN side MTU is. We've so far had 6 customers report the issue - we can see that the last call on 30th September worked and the first and subsequent calls on 1st October failed. Is anyone aware of an update to CPE devices pushed out that night which may have broken their ability to handle IP fragmentation?

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Re: IPv6 Pain Experiment
by Masataka Ohta 03 Oct '19

03 Oct '19

Denis Fondras wrote: >> What? It's a typical configuration with glues. >> >> For example, in my organization, ns1.noc.titech.ac.jp is the >> primary for noc.titech.ac.jp and titech.ac.jp. > Sorry, you are right, I probably haven't understood. A more artificial configuration is primary1.childzone.parentzone.example.com is the primary for parentzone.example.com and primary2.childzone.parentzone.example.com is the primary for childzone.parentzone.example.com But, note that DNS operators in the real world are so creative. Masataka Ohta

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Re: IPv6 Pain Experiment
by Masataka Ohta 03 Oct '19

03 Oct '19

Denis Fondras wrote: >> What if primary.childzone.parentzone.example.com >> is the primary for parentzone.example.com, >> and childzone.parentzone.example.com? >> > > In that specific case it looks like you are asking for trouble regardless of > address family :) What? It's a typical configuration with glues. For example, in my organization, ns1.noc.titech.ac.jp is the primary for noc.titech.ac.jp and titech.ac.jp. Masataka Ohta

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Twilio
by Ben Cannon 03 Oct '19

03 Oct '19

Can an engineer for Twilio please reach out to me off-list if possible? Thanks. -Ben. -Ben Cannon CEO 6x7 Networks & 6x7 Telecom, LLC ben(a)6by7.net <mailto:ben@6by7.net>

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Re: IPv6 Thought Experiment
by Scott Weeks 02 Oct '19

02 Oct '19

-------------------------- “MUST NOT support IPv4”.. I think a good start would be: "MUST support IPv6"! ----------------------------------- Woah, there! Hold your horses. It's only been 20-something years. You can't expect these things to happen overnight! >;-) scott

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Optical training
by James Chang 02 Oct '19

02 Oct '19

Hi All, Hopefully this is the right place to post this question. I'm a routing guy mainly working with ISIS/BGP for my company in our core space. I have an opportunity to get involve with our L2 DWDM network. We are a Cisco shop using NCS2K as DWDM nodes. But before jump into learning the NCS specific stuff, I would like to take a vendor neutral training course in Optical fiber testing with OSA/OTDR, OTN, DWDM signaling, OSNR/dispersion....etc. I think this will help me understand how to build out a DWDM network from ground up. I'm hoping someone I could get into designing network for my company. Thanks in advance, James

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OARC 31 Agenda Published ; OARC32 CfP!
by Joe Abley 02 Oct '19

02 Oct '19

Note for the record: I am not actually Keith, nor do I play Keith on TV. -- Dear colleagues, The agenda for the 31st DNS-OARC Workshop has now been published at: <https://www.dns-oarc.net/oarc31> OARC 31 takes place at the JW Marriott Austin, in Texas, USA on October 31st and November 1st, immediately after NANOG77. REGISTRATION == To participate in person, please register to attend sooner rather than later - Early Bird Registration ends on October 9th - at the link below, on the “Registration” page: <https://www.dns-oarc.net/oarc31> OARC 32 CfP == OARC 32 will take place on February 8th, 2020 in San Francisco - and now that we have announced the agenda for the upcoming Workshop, we have opened the CfP for the one after. Take a look at: <https://www.dns-oarc.net/oarc32> Come and celebrate #OARCtoberfest with us! Regards Keith Mitchell, DNS-OARC.

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Clueful netops/sysops persons at Canon
by Eric Dugas 01 Oct '19

01 Oct '19

Hello, One of our customers is having issues with his Canon printers that needs to connect to https://ugwportal.net for whatever reason. The issue is only visible from one of our netblock to a few IPs in 202.248.100.0/24. I don't believe this is a routing issue. The netblock is routed by Fujitsu's AS2510 and the servers may be even managed by Fujitsu so I've tried to reach fip-idcstaff(a)ml.jp.fujitsu.com and fip-idcstaff(a)dl.jp.fujitsu.com who are listed as the admin and tech contact for 202.248.100.0/24 but the tech contact email bounced. The second address didn't seem to bounce back but I am not convinced we're reaching the right company/group so I'm trying to find a clueful contact specifically from Canon in North America or even Europe to take a look help us find the right group to address the situation. Thanks in advance

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Cisco Metro Ethernet Switching
by Bogle, Nick 30 Sep '19

30 Sep '19

Hey there! I'm currently working on a project which entails refreshing a few EoL switches that sit on a Metro Ethernet fiber ring that we own acting as essentially a PE handoff. It's primarily just a Layer 2 ring with mostly ME3400E switches. We are not in a place to convert the entire ring to our standard Nokia SAR platform, and just wanted to bring all of our sites to standard on the ME3400E platform for consistency (have four switches on the ring that are currently 3560G's and don't support the needed QoS/CoS). As the ME3400E is currently End of Sale, what would you guys recommend as far as a replacement? I am leaning towards the ASR920's (affordable, seems like a solid proven platform, future flexibility), or the NCS 520 (Ciscos recommended replacement), but neither of them seem like appropriate replacements for a simple Layer 2 switching platform with just the need for decent QoS and CoS capabilities. No Layer 3, MPLS, or 10G+ is required. 12 1G SFP ports is about all we need. Let me know your thoughts -- haven't payed much attention to the Cisco service provider space as of late. Thank you! Nick Bogle Network Engineer [signature] <https://www.avistacorp.com/> 1411 E Mission Ave. MSC-40 Spokane WA 99202 P 509-495-8525 C 509-220-5763 www.avistacorp.com<http://www.avistacorp.com/> CONFIDENTIALITY NOTICE: The contents of this email message and any attachments are intended solely for the addressee(s) and may contain confidential and/or privileged information and may be legally protected from disclosure. If you are not the intended recipient of this message or an agent of the intended recipient, or if this message has been addressed to you in error, please immediately alert the sender by reply email and then delete this message and any attachments.

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