Re: [EXT] Xfinity (both ends) - can't ping from users home to office

On Thu, Jun 18, 2020 at 11:57:12PM +, Spencer Coplin wrote: > I have a client that is unable to ping his office Comcast Business connection > from his home Xfinity connection. It was working a month ago and we can > confirm that his connection works over his iphone's hotspot. I am able to >

Re: Partial vs Full tables

On Fri, Jun 05, 2020 at 10:20:00AM -0700, William Herrin wrote: > On Fri, Jun 5, 2020 at 9:49 AM Saku Ytti wrote: > > The comparison isn't between full or default, the comparison is > > between static default or dynamic default. Of course with any default > > scenario there are more failure modes

Re: [EXT] AS hijacking (Philosophy, rants, GeoMind)

Go back to them and tell them that a hijacked prefix is different from a hijacked AS. On Fri, May 29, 2020 at 11:39:46AM -0400, Justin Wilson (Lists) wrote: > One of the companies I work for recently had an issue with AS 2 (University > of Delaware) hijacking a prefix. Due to Origin AS, good

Re: [EXT] Re: rack rails

On Mon, Mar 30, 2020 at 07:09:48PM +0300, Nitzan Tzelniker wrote: > We tried to flip the sides of rails in QFX5120 and it cause two problems > that prevent us from keeping it this way > 1. The switch was 2 cm from the rear post line > 2. The switch vibrate as you can see in the video >

Re: [EXT] Re: rack rails

On Mon, Mar 30, 2020 at 05:27:44PM +0200, Tore Anderson wrote: > * Chuck Anderson > > > The point is that the switches need to be removable without empty > > space above/below, and ideally from the rear side of the rack. By > > having extending/sliding rails,

Re: [EXT] Re: rack rails

On Mon, Mar 30, 2020 at 03:15:54PM +, Cummings, Chris wrote: > Juniper's ToR switches have slide in rails. They are a bit frustrating > compared to Dell easy rails, but they do the trick. You can slide the switch in/out while attached securely to the rails? That is news to me and my QFX5k

Re: [EXT] Re: rack rails

On Mon, Mar 30, 2020 at 10:09:25AM -0500, Chris Adams wrote: > Once upon a time, Chuck Anderson said: > > I've been asking manufacturers for proper server-like slide-rails for their > > switches for years. Now they've started making the switches as deep or > > eve

Re: [EXT] Re: rack rails

On Mon, Mar 30, 2020 at 04:18:18PM +0200, Tore Anderson wrote: > When a rack has been filled up, removal/insertion through the rear will often > be essentially impossible due to cables, vertical PDUs and stuff like that > that gets in the way. > > Explained in pictures here: >

Re: [EXT] Shining a light on ambulance chasers - Noction

On Thu, Mar 26, 2020 at 01:39:20PM -0700, Sabri Berisha wrote: > - On Mar 25, 2020, at 5:13 PM, Chuck Anderson c...@wpi.edu wrote: > > > Let's start a public blacklist, sort of like a RBL reputation block list or > > 800notes.com, but for companies to "never to do busi

Re: [EXT] Shining a light on ambulance chasers - Noction

. > > Public pressure is the only way to police _this_. > > YMMV, > > -M< > > On Wed, Mar 25, 2020 at 4:30 PM Chuck Anderson wrote: > > > Someone should tell them what happened to Cogent for scraping ARIN WHOIS. > > > > On Wed, Mar 25, 2020 at

Re: [EXT] Shining a light on ambulance chasers - Noction

Someone should tell them what happened to Cogent for scraping ARIN WHOIS. On Wed, Mar 25, 2020 at 04:13:51PM -0400, Rodney Joffe wrote: > Under the heading of sales spam from our community that is in even poorer > taste, and sucks: > > > Begin forwarded message: > > > From: Josh Ankin > >

Re: [EXT] ISC BIND 9 breakage?

On the BIND Users list: https://lists.isc.org/pipermail/bind-users/2020-March/102820.html On Wed, Mar 25, 2020 at 05:18:49PM +, Drew Weaver wrote: > Did anyone else on CentOS 6 just have some DNS resolvers totally fall over? > > I noticed that this command: dnssec-lookaside auto; was

Re: [EXT] Re: Hi-Rise Building Fiber Suggestions

After 30 add/drops you may lose too much power. There is a minimum 1.4dB per passthru and 1.3dB per add/drop, 3.5dB per MUX at the ends. With these SFP+ modules: https://www.fs.com/products/31238.html it looks like you would have a 19-20 dB budget to work with. You may be able to get 10

Re: What NMS do you use and why?

On Wed, Aug 15, 2018 at 08:49:12AM -0500, Colton Conor wrote: > We are looking for a new network monitoring system. Since there are so many > operators on this list, I would like to know which NMS do you use and why? > Is there one that you really like, and others that you hate? > > For free

Re: What NMS do you use and why?

On Wed, Aug 15, 2018 at 08:49:12AM -0500, Colton Conor wrote: > We are looking for a new network monitoring system. Since there are so many > operators on this list, I would like to know which NMS do you use and why? > Is there one that you really like, and others that you hate? > > For free

Re: Bogon prefix c0f:f618::/32 announced via Cogent

On Mon, Jul 16, 2018 at 05:20:12PM +0200, Stephane Bortzmeyer wrote: > On Sat, Jul 14, 2018 at 08:18:25AM +0800, > Siyuan Miao wrote > a message of 27 lines which said: > > > c0f:f618::/32 originated from AS327814 is announcing via Cogent for several > > weeks. > > Apparently withdrawn

Re: Bogon prefix c0f:f618::/32 announced via Cogent

Looks like a typo of 2c0f:f618: A V DestinationP Prf Metric 1 Metric 2 Next hopAS path* ? 2c0f:f618::/32 B 170150 69040 174 327814 ? unverified >fe80::f5c0:800:2 On Sat, Jul 14, 2018 at 08:18:25AM

Re: NG Firewalls & IPv6

Also, IPv6 BGP support was only introduced in PanOS 8. But everything works fine here too. On Wed, Apr 04, 2018 at 10:47:45AM +, Dan Kitchen wrote: > We run PaloAlto dual stack with no problems at all, that’s full dynamic > routing with OSPF and BGP, web filtering, IPS, VPN access using >

Re: How are you configuring BFD timers?

In practice, the vendor's recommendations regarding Routing Engine HA provide a lower bound. I'm just starting out with 1000ms x 3 multiplier, but my network is not national or global. I believe I could go as low as 500ms to keep HA happy. On Wed, Mar 21, 2018 at 09:10:28AM -0400, Jason

Re: Juniper MX - Routed pseudowire using LDP - VPWS or VPLS

Would you mind sharing the solution(s)? I've stiched a L2 PW using lt-interfaces. Thanks. On Mon, Mar 19, 2018 at 11:51:36AM -0500, Ben Bartsch wrote: > I want to thank everyone who contacted me on and off list on this request. > I now have two methods to land a layer 3 endpoint on a layer 2

Re: Site-Local/Unique-Local Addressing (IPv6)

On Mon, Jan 08, 2018 at 05:03:14PM +, Nicholas Warren wrote: > Layman here, I was reviewing RFCs for a local address for IPv6. I came across > two RFCs that seem interesting. > > 3879 Which deprecates Site Local Addresses. > 4193 Which seems to add Unique Local Addresses. > > What is the

Re: Switch/Router

Juniper MX150, except only single PS. But they are cheap enough you could buy two. Upside: most of the MX feature set is available because it is vMX (software) inside. QFX5110 is more expensive but has more ports and dual PS. Downside: Broadcom chipset limitations. On Tue, Dec 12, 2017 at

Re: Novice sysadmins

On Wed, Dec 06, 2017 at 02:18:07PM -0500, Harald Koch wrote: > On 6 December 2017 at 13:51, Stephen Satchell wrote: > > > What professional engineers you mentioned do can kill people. I have yet > > to hear of anyone dying from a sysadmin or netadmin screwing up. > > > > Oh

Re: Incoming SMTP in the year 2017 and absence of DKIM

On Wed, Nov 29, 2017 at 12:17:57PM -0800, Michael Thomas wrote: > The real problem with large enterprise that we found, however, is > that it was really hard to track down every 25 year > old 386 sitting in dusty corners that was sending mail directly > instead of through corpro servers to make

Re: Looking for help @ 60 Hudson

On Mon, Nov 13, 2017 at 01:30:25PM -0800, Seth Mattinen wrote: > On 11/13/17 12:49, Mike Hammett wrote: > >Keep the humans out of the rack and you should be fine. > > > >Where should I send the invoice?:-P > > > It's easy to keep a rack nice if you take the time. I've spent hours > removing and

Re: Are there inexpensive DWDM products?

CWDM is cheaper and will probably work fine within a city. Check fs.com. On Thu, Nov 02, 2017 at 06:01:10PM +, LF OD wrote: > We have several buildings and a couple data centers spread around the city > and interconnected via dark fiber. It's a very simple setup - no ROADM, no > real ring,

Re: Temp at Level 3 data centers

Install an air conditioner in your rack. On Wed, Oct 11, 2017 at 02:39:19PM -0500, Andrew Latham wrote: > David > > The issue has several components and is vendor agnostic. > > Set Point: The systems are specifically set at a temperature > Capacity Ability: The systems can maintain a

Re: Vendors spamming NANOG attendees

I've started keeping a list of companies who make unsolicited calls/emails. I tell them that I put them on my list of companies never to do business with. On Tue, Jun 13, 2017 at 01:12:07PM -0400, Rich Kulawiec wrote: > On Tue, Jun 13, 2017 at 03:31:46PM +, Mel Beckman wrote: > > Sometimes

Re: Merit RADB support

On Wed, Jun 07, 2017 at 12:08:50PM -0400, Chuck Anderson wrote: > On Wed, Jun 07, 2017 at 10:41:16AM -0500, Kaiser, Erich wrote: > > Anyone gonna email me back from RADB support? > > In my experience, no. Apologies to Merit RADB, it was BGPmon that never responds. Merit RAD

Re: [SPF:Probably_Forged] Merit RADB support

On Wed, Jun 07, 2017 at 10:41:16AM -0500, Kaiser, Erich wrote: > Anyone gonna email me back from RADB support? In my experience, no.

Re: google ipv6 routes via cogent

Define "good" vs. "bad" transport of bits. As long as there is adequate bandwidth and low latency, who cares? On Thu, Mar 02, 2017 at 08:30:37PM +0100, Baldur Norddahl wrote: > That will have the effect of prioritizing Cogent routes as that would be > more specific than the default routes from

Re: Consumer networking head scratcher

On Thu, Mar 02, 2017 at 12:24:38PM +0700, Roland Dobbins wrote: > On 2 Mar 2017, at 9:55, Oliver O'Boyle wrote: > > >Currently, I have 3 devices connected. :) > > What about DNS issues? Are you sure that you really have a > networking issue, or are you having intermittent DNS resolution >

Re: DWDM Optics cheaper than CWDM Optics?

I've bought their DWDM 80km 10gig and they are working beautifully on a couple amplified circuits with both Cisco and Juniper routers. I've also bought gray optics and DACs. The only issue I've noted with some QSFP+ DACs is some kind of programming issue where the serial number is mis-read by

Re: radb mirroring

On a similar note, Level3's database has many stale entries from WCGDB which no longer exists as far as I can tell. Does anyone have a good contact at Level3 for removing all the entries with a source: WCGDB? There are some of mine that I'd like to have removed. Here is an example of Charter's

Re: 10G switch drops traffic for a split second

Without more detail, I'm grasping at straws here, but see this recent thread about QoS and microbursts on the juniper-nsp list: https://puck.nether.net/pipermail/juniper-nsp/2016-November/033692.html Do you have ports with different speeds connected? Another idea: Are you using Spanning Tree

Re: NIST NTP servers

On Fri, May 13, 2016 at 10:12:49AM -0400, Lamar Owen wrote: > On 05/11/2016 09:46 PM, Josh Reynolds wrote: > >maybe try [setting up an NTP server] with an odroid? > > > ... > > I have several ODroid C2's, and the first thing to note about them > is that there is no RTC at all. Also, the

Re: Stop IPv6 Google traffic

Assign your customers larger v6 prefixes so one customer's bad behavior doesn't affect the others? On Sun, Apr 10, 2016 at 05:27:53PM +0300, Max Tulyev wrote: > The problem is IPv6-enabled customers complaints see captcha, and Google > NOC refuses to help solve it saying like find out some of

small automatic transfer switches

Does anyone have any recommendations for a small, cheap, reliable ATS? (I know, pick two, you can't have all three) I'm looking for something to power one or two 120V out-of-band network device(s) in each location with a single power supply each, much less than 10 amps total, with two 120v input

Re: configuration sanity check

On Thu, Oct 29, 2015 at 09:16:48AM +0100, marcel.durega...@yahoo.fr wrote: > Hi Nanogers, > > Any recommendation about a software which check the live config of > cisco/juniper devices against some templates ? > > The goal is to have a template about different function device, like: > - CORE

Re: How to force rapid ipv6 adoption

On Fri, Oct 02, 2015 at 08:28:13AM +1000, Mark Andrews wrote: > > In message <4f2e19ba-d92a-4bec-86e2-33b405c30...@delong.com>, Owen DeLong > writes: > > > > > On Oct 1, 2015, at 13:55 , Grzegorz Janoszka > > wrote: > > > > > > On 2015-10-01 20:29, Owen DeLong wrote: > >

Re: udp 500 packets when users are web browsing

Sounds like Opportunistic Encryption. https://en.wikipedia.org/wiki/Opportunistic_encryption#Windows_OS On Thu, Sep 03, 2015 at 09:53:46AM -0400, Robert Webb wrote: > There is no VPN in the picture here. These are straight workstations > on the network that the packets are coming from. > >

Re: ATT U-Verse Data Setup Convention

People need to really stop using Source IP as an ACL mechanism whereever possible. Have you considered using SSL certs or SSH keys or some other sort of API key instead? I'm mean, do you really want to have to know how the technology of every ISP that every possible SaaS customer may use to

Re: Remember Internet-In-A-Box?

On Thu, Jul 16, 2015 at 07:59:14AM +0200, Tore Anderson wrote: * Owen DeLong o...@delong.com On Jul 15, 2015, at 08:57 , Matthew Kaufman matt...@matthew.at wrote: This is only true for dual-stacked networks. I just tried to set up an IPv6-only WiFi network at my house recently, and it

Re: 192.0.1.0/24?

On Fri, Apr 17, 2015 at 11:13:11PM +0200, Marco Davids wrote: Marco Davids schreef op 17-04-15 om 23:08: https://tools.ietf.org/html/rfc6333 ? Oh wait, that's 192.0.0.0/29, not 192.0.1.0/24... 192.0.1.0/24 sounds vaguely like something really old HP JetDirects used as a default IP when

Re: Prefix hijack by INDOSAT AS4795 / AS4761

We are AS 10326 130.215.0.0/16 and I just received a BGPmon alert as well: 130.215.160.0/20 4795 4795 4761 9304 40633 18978 4436 10326 130.215.176.0/20 4795 4795 4761 9304 40633 18978 4436 10326 On Thu, Mar 26, 2015 at 10:45:09AM -0400, Christopher Morrow wrote: On Thu, Mar 26, 2015 at 10:43

Re: Comcast New England dropped for 5-15 min? Anyone

I saw a problem only with my 50.176.16.0/21 subnet IP. My 24.147.20.0/21 subnet IP was working fine throughout. On Wed, Feb 11, 2015 at 01:44:53PM -0500, Robert Webb wrote: Looks like there were at least a couple of others that saw issues also.

Re: look for BGP routes containing local AS#

It used to be the case that looped routes didn't even show up as hidden routes, because Junos discarded them even from Adj-RIB-In, although this may have changed at some Junos version. Also, Junos won't even advertise such looped routes to a neighbor with the same AS by default, so in many cases

Re: Recommended L2 switches for a new IXP

Software Defined Networking (SDN) features that QFX5100 supports: Automatic configuration of OVSDB-managed VXLANs with trunk interfaces 14.1X53-D15 OVSDB support 14.1X53-D10 OpenFlow v1.0 14.1X53-D10 OpenFlow v1.3.1 14.1X53-D10 VXLAN Gateway 14.1X53-D10

Re: MPLS VPN design - RR in forwarding path?

On Wed, Dec 31, 2014 at 01:08:15PM +0100, Marcin Kurek wrote: Hi everyone, I'm reading Randy's Zhang BGP Design and Implementation and I found following guidelines about designing RR-based MPLS VPN architecture: - Partition RRs - Move RRs out of the forwarding path - Use a high-end

Re: DWDM Documentation

On Thu, Dec 04, 2014 at 01:21:16PM +, Theo Voss wrote: Hi guys, we, a Berlin / Germany based carrier, are looking for a smart documentation (shelfs, connections, fibers) and visualization tool for our ADVA-based DWDM-enviroment. Do you have any suggestions or hints for me? We’re

Re: Phasing out of copper

Verizon in MA removes copper upon FiOS installation. My dad cancels his phone service every year when he migrates south for the winter. Upon returning home a few years ago, he requested reactivation of his phone line. Verizon refused to activate the copper, instead switching him to FiOS Voice.

outages list down? Lightower, Worcester, MA fiber cut

fiber cut: Date: Fri, 7 Nov 2014 07:26:55 -0500 From: Chuck Anderson c...@wpi.edu To: outa...@outages.org Subject: Re: [outages] Lightower, Worcester, MA fiber cut Update as of 06:05:16 -0500: Status has remained the same Lightower has two (2) 288 cables that were burnt through in a National Grid

Re: Finisar SFP/SFP+

Cheap DIY SFP programmer using a Raspberry Pi: http://eoinpk.blogspot.com/2014/05/raspberry-pi-and-programming-eeproms-on.html Software: https://code.google.com/p/sfppi/ Now we just need some code to brute-force the OEM passwords... How fast is the 2-wire bus on SFPs? On Tue, Jun 24, 2014 at

Re: IPv6 Security [Was: Re: misunderstanding scale]

On Wed, Mar 26, 2014 at 06:52:53PM -0500, Timothy Morizot wrote: On Mar 26, 2014 6:27 PM, Luke S. Crawford l...@prgmr.com wrote: My original comment and complaint, though, was in response to the assertion that DHCPv6 is as robust as DHCPv4. My point is that DHCPv6 does not fill the role

Re: L6-20P - L6-30R

On Tue, Mar 18, 2014 at 07:09:49PM -0400, David Hubbard wrote: I've had to do that before; provider gave me a 208v/30a circuit and I already had a power strip I wanted to re-use that had a corded L6-20P connector on it. I purchased a L6-30P plug / L6-20R receptacle adapter from

Re: L6-20P - L6-30R

On Wed, Mar 19, 2014 at 12:24:38PM -0400, William Herrin wrote: On Wed, Mar 19, 2014 at 11:22 AM, Lamar Owen lo...@pari.edu wrote: Just replacing an L6-20P with an L6-30P on a 20A-listed PDU would be unsafe and (IMO) unwise, since the breaker in the input of the PDU does not protect the

Re: L6-20P - L6-30R

On Wed, Mar 19, 2014 at 02:05:42PM -0400, William Herrin wrote: On Wed, Mar 19, 2014 at 1:55 PM, Jay Ashworth j...@baylink.com wrote: PoE is 48V and current limited, though, precisely to keep it what the Code calls Low Voltage. Hi Jay, 50 watts DC. It won't electrocute you (that's AC)

Re: NetSol AAAA glue

It is quicker and easier to transfer your domain to another registrar, even though you will have to call them up and speak to a person to do it. On Fri, Feb 21, 2014 at 08:01:06PM -0500, Brandon Applegate wrote: If anyone with ability to fix this is reading this - contact me offlist and I'll

Re: BCP38 is hard, was TWC (AS11351) blocking all NTP?

On Tue, Feb 04, 2014 at 10:18:21PM -, John Levine wrote: I was at a conference with people from some Very Large ISPs. They told me that many of their large customers absolutely will not let them do BCP38 filtering. (If you don't want our business, we can find someone else who does.) The

Re: IPv6 /48 advertisements

On Wed, Dec 18, 2013 at 09:11:46AM -0700, Cliff Bowles wrote: Question: will carriers accept IPv6 advertisements smaller than /48? Not generally, no. Our org was approved a /36 based on number of locations. The bulk of those IPs will be in the data centers. As we were chopping up the

Re: turning on comcast v6

On Mon, Dec 09, 2013 at 11:19:18AM -0500, Christopher Morrow wrote: On Mon, Dec 9, 2013 at 11:08 AM, Randy Bush ra...@psg.com wrote: do you see PD from your modem? or RA's? still trying to educate the opwnwrt (attitude adjustment on netgear 3800). ... yea, so my 'saga' started with:

Re: BGP neighbor/configuration testing

Authentication failure might mean (without knowing for sure which on Cisco): - mismatch AS numbers - mismatch neighbor IP addresses - multihop/TTL issues - MTU issues On Mon, Nov 25, 2013 at 11:06:33AM -0800, Eric A Louie wrote: That's a natural first impression but there are no passwords

Re: BGP neighbor/configuration testing

, no logged error I haven't created the multihop scenario to see the error messages. None of these issues caused the (authentication failure). From: Chuck Anderson c...@wpi.edu To: nanog@nanog.org Sent: Monday, November 25, 2013 11:10 AM

Re: Suggestion on Fiber tester

On Thu, Sep 26, 2013 at 02:23:37AM +, Blake Pfankuch - Mailing List wrote: I am in the market for a simple fiber tester. I have about 80 pairs running through my complex and we are running into some possible issues with some of the really old ones. The pen light to confirm that it's the

recommended outdoor enclosures

I'm in need of my first free-standing, pad-mounted outdoor enclosure, 19 rack rails, 12-18 rack units, with about 400W of heat load inside, for use in the Massachusetts climate. What do people recommend as far as contruction, cooling/heating options, NEMA ratings, security options, etc. for this

Re: recommended outdoor enclosures

On Mon, Jun 17, 2013 at 04:19:07PM -0400, Jon Sands wrote: This is by far a cheaper option, but should work just fine. I'm about to do the same myself. Grab a used cab here - http://www.usedtowers.com/CABINETS/CABINETS.htm Some of those come with the factory huge AC systems built for

Re: recommended outdoor enclosures

, and winter ambient 0 F. Hoffman makes a 72 high NEMA12 enclosure with a swing-out 19 telco rack. On Mon, Jun 17, 2013 at 12:36 PM, Chuck Anderson c...@wpi.edu wrote: I'm in need of my first free-standing, pad-mounted outdoor enclosure, 19 rack rails, 12-18 rack units, with about 400W of heat load

Re: Entry level WDM gear? follow-up

On Fri, May 17, 2013 at 10:18:34PM -0400, Jeff Kell wrote: On 5/10/2013 9:56 AM, Jerimiah Cole wrote: On 05/08/2013 09:21 PM, Jeff Kell wrote: Ciena/Cyan/etc are way over our non-existant budget... what is the going recommendation to throw say 4-8 lambdas over a dark pair without

Re: Verizon DSL moving to CGN

I think he means patent encumbered. On Mon, Apr 08, 2013 at 07:13:11PM +, Rajiv Asati (rajiva) wrote: Chris, UmmmŠ you mean the IPv6 and IPv4 inter-dependency when you say IP encumbered? If so, the answer is Yes. v6 addressing doesn't need to change to accommodate this IPv4 A+P

Re: Verizon DSL moving to CGN

which says: ...(MAP) is a Cisco IPv6 transition proposal... so.. err, we won't see this in juniper gear since: 1) not a standard 2) encumbered by IPR issues weee! Thanks for the clarity, Chuck. Cheers, Rajiv -Original Message- From: Chuck Anderson c...@wpi.edu

Re: 80 km BiDi XFPs

On Fri, Apr 05, 2013 at 10:58:49AM -0600, Jerimiah Cole wrote: On 04/05/2013 10:39 AM, Randy Carpenter wrote: I'm going to guess that this is not going to meet the OP's request for an XFP, which would be 10GbE (and not an SFP). Probably a safe guess. Mea culpa. Check out Integra

Re: 2-Channel CWDM Add/Drop with SC/APC connectors

On Fri, Feb 08, 2013 at 10:55:34AM +0100, Thilo Bangert wrote: On Thursday, February 07, 2013 08:04:41 PM Chuck Anderson wrote: Is it that much harder to terminate the angled connectors? no - its just a different type of pigtail, but adding another splice, will increase the insertion loss

2-Channel CWDM Add/Drop with SC/APC connectors

Years ago I was able to purchase 2-Channel CWDM Plug-In 1-Wavelength Optical Add/Drop Multiplexors from Finisar with SC/APC connectors on them, even though they normally only make the SC/PC version shown here: FWSF-OADM-1-xx-SC

TOR fiber patch panels

I'm looking for better Top-Of-Rack fiber patch panels than the ones I've been using up to this point. I'm looking for something that is 1U, holds 12 to 24 strands of SC, ST, or LC, has fiber jumper management rings, and has a door that doesn't interfere with the U below (a server might be mounted

Re: CLI Roadmap

On Sun, Oct 14, 2012 at 07:41:01PM +0200, Kasper Adel wrote: I have never used any CLI other than Cisco so i am curious what useful and creative knobs and bolts are available for other network appliance Vendors. Junos OS has: - Multi-level hierarchical configuration with absolute or relative

Re: F-ckin Leap Seconds, how do they work?

Same here with KVM guests on Scientific Linux 6 (RHEL 6 clone) hosts. No issues on SL 6 and CentOS 5 guests. We also do not run NTP on the VMs, only on the hosts. The guest VM kernels did not log any leap second clock change, but appear to have the same time as the hosts. The hosts DID have

Re: Squeezing IPs out of ARIN

On Wed, Apr 25, 2012 at 08:28:35AM -0700, Owen DeLong wrote: On Apr 25, 2012, at 3:23 AM, Joe Maimon wrote: ad...@thecpaneladmin.com wrote: Anyone have any tips for getting IPs from ARIN? For an end-user allocation they are requesting that we provide customer names for existing

Re: Automatic IPv6 due to broadcast

On Mon, Apr 23, 2012 at 12:24:53AM -0700, Owen DeLong wrote: On Apr 22, 2012, at 10:30 PM, Jimmy Hess wrote: Particularly good L2 switches also have DAI or IP Source guard IPv4 functions, which when properly enabled, can foil certain L2 ARP and IPv4 source address spoofing

Re: Automatic IPv6 due to broadcast

On Mon, Apr 23, 2012 at 06:38:09AM -0700, Owen DeLong wrote: On Apr 23, 2012, at 6:25 AM, Chuck Anderson wrote: On Mon, Apr 23, 2012 at 12:24:53AM -0700, Owen DeLong wrote: On Apr 22, 2012, at 10:30 PM, Jimmy Hess wrote: Particularly good L2 switches also have DAI or IP Source guard

how to report spam to Yahoo!

Yahoo!'s abuse contact from whois: OrgAbuseEmail: network-ab...@cc.yahoo-inc.com now sends an autoresponse that tells you to go to a web form to report spam: http://help.yahoo.com/l/us/yahoo/mail/yahoomail/spam.html but the link doesn't work--it just redirects to a generic Yahoo! help page

Re: dns and software, was Re: Reliable Cloud host ?

On Thu, Mar 01, 2012 at 05:57:11PM -0500, William Herrin wrote: Which is what everybody basically does. And when it works during the decidedly non-rigorous testing, they move on to the next problem... with code that doesn't perform well in the corner cases. Such as when a host has just been

Re: Common operational misconceptions

On Thu, Feb 16, 2012 at 08:27:14AM -0500, Jeff Kell wrote: On 2/16/2012 8:17 AM, Ray Soucy wrote: I've found starting off with some history on Ethernet (Maine loves Bob Metcalfe) becomes a very solid base for understanding; how Ethernet today is very different; starting with hubs, bridges,

Re: Common operational misconceptions

ICMP is bad, and should be completely blocked for security. On Wed, Feb 15, 2012 at 02:47:15PM -0600, John Kristoff wrote: Hi friends, As some of you may know, I occasionally teach networking to college students and I frequently encounter misconceptions about some aspect of networking that

Re: Common operational misconceptions

On Wed, Feb 15, 2012 at 04:51:44PM -0600, Anton Kapela wrote: On Wed, Feb 15, 2012 at 4:36 PM, Chuck Anderson c...@wpi.edu wrote: ICMP is bad, and should be completely blocked for security. I can't tell if this reply is to say this ought to be done or if this is often done, and should

Re: RoadRunner/Adelphia AS14065 contact

On Wed, Jan 11, 2012 at 12:14:29PM -0800, chk wrote: If there is a Roadrunner contact monitoring the list can you please contact me off list regarding a routing issue from ns1/2.adelphia.net Did you ever get any response? I'm having a similar issue: For the past couple months, we have been

Re: using ULA for 'hidden' v6 devices?

On Thu, Jan 26, 2012 at 07:53:18PM +, George Bonser wrote: Even if you don't see an advantage to GUA, can you point to a disadvantage? Just a matter of convenience. If you have a lot of management IPs or some other IP addresses that are never going to need internet access (an array

Re: Linux Centralized Administration

On Thu, Jan 12, 2012 at 04:02:49PM -0500, Paul Stewart wrote: Hey folks. just curious what people are using for automating updates to Linux boxes? yum Today, we manually do YUM updates to all the CentOS servers . just an example but a good one. I have heard there are some open source

Re: Does anybody out there use Authentication Header (AH)?

I'm using AH for OSPFv2 and OSPFv3 authentication. For OSPFv3, there is no other option than some kind of IPsec for authentication. I'm also using it for OSPFv2 so I don't have to maintain multiple authentication methods and keys for the different protocols.

Re: Range using single-mode SFPs across multi-mode fiber

On Wed, Dec 14, 2011 at 10:02:58PM -0500, oliver rothschild wrote: Thanks to all who responded to my clumsy first question (both on matters of etiquette and technology). The group I work with (we are a small project acting as a last mile provider) was in the midst of deploying this solution

Re: Range using single-mode SFPs across multi-mode fiber

On Wed, Dec 14, 2011 at 10:38:47PM -0500, Keegan Holley wrote: 2011/12/14 oliver rothschild orothsch...@gmail.com Thanks to all who responded to my clumsy first question (both on matters of etiquette and technology). The group I work with (we are a small project acting as a last mile

Re: IPv6 prefixes longer then /64: are they possible in DOCSIS networks?

On Wed, Nov 30, 2011 at 06:55:56PM -0600, Jimmy Hess wrote: On Wed, Nov 30, 2011 at 2:13 PM, Owen DeLong o...@delong.com wrote: On Nov 30, 2011, at 9:10 AM, Ray Soucy wrote: I do believe that there is no benefit to longer prefixes than /64. Nobody has provided any convincing evidence to the

Re: MX 80 advantages and shortcomings

On Tue, Jul 05, 2011 at 12:48:45PM -0400, Paul Stewart wrote: Pros - small footprint, cost, feature rich Cons - no redundancy (other than power), 1/3rd the processor power cons - being a different CPU architecture from its bigger cousins, features tend to not appear at the same time on MX80 as

Re: Cogent IPv6

On Wed, Jun 08, 2011 at 10:33:29PM -0500, Chris Adams wrote: Once upon a time, William Herrin b...@herrin.us said: Now, as to why they'd choose a /112 (65k addresses) for the interface between customer and ISP, that's a complete mystery to me. I had to ask this here a while back, so I can

Re: Mac OS X 10.7, still no DHCPv6

On Sat, Feb 26, 2011 at 09:46:17PM -0800, Joel Jaeggli wrote: On 2/26/11 9:27 PM, Mikael Abrahamsson wrote: On a more serious note, I can on my Ubuntu machine just apt-get install wide-dhcpv6-client and I get dhcpv6, it'll properly put stuff in resolv.conf for dns-over-ipv6 transport, even

Re: 10GBASE-T Switches

On Thu, Feb 10, 2011 at 09:33:50AM +, Roberts, Brent wrote: Looking for feedback/recommendations on higher density Switch’s in the 10GBASE-T arena. Preferably TOR switches if possible. Minimum 16 ports usable for Rack Server connectivity + Uplinks to Collapsed Twin Distro/Core setup.

Re: Using IPv6 with prefixes shorter than a /64 on a LAN

On Tue, Feb 01, 2011 at 03:14:57PM -0800, Owen DeLong wrote: On Feb 1, 2011, at 2:58 PM, Jack Bates wrote: There are many cases where ULA is a perfect fit, and to work around it seems silly and reduces the full capabilities of IPv6. I fully expect to see protocols and networks within

Re: help needed - state of california needs a benchmark

On Sat, Jan 29, 2011 at 10:00:36AM -0800, Mike wrote: issue, how do we go about getting 'the message' across, how do we go about engineering something that could be considered statistically relevant, and most importantly, how do we get this to be accepted by non-technical legislators and

Re: Is Cisco equpiment de facto for you?

On Wed, Jan 12, 2011 at 11:10:16PM -0800, Scott Weeks wrote: To be fair to Cisco and maybe I'm way off here. But it seems they do come out with a way to do things first which then become a standard that they have to follow. ISL/DOT1Q HSRP/VRRP etherchannel/LACP Yes, and then they keep

Re: Pointer for documentation on actually delivering IPv6

On Tue, Dec 07, 2010 at 08:18:31AM -0500, david raistrick wrote: On Mon, 6 Dec 2010, Owen DeLong wrote: Seriously, though, you're welcome to use fd00::/8 for exactly that purpose. The problem is that you (and hopefully it stays this way) won't have much luck finding a vendor that will

Re: Want to move to all 208V for server racks

On Thu, Dec 02, 2010 at 01:59:33PM -0500, Alex Rubenstein wrote: A couple of reasons.. Neutral current, more power delivered using less copper, etc. Personally, I like delivering two L21-30's per rack and call it day - allows for a comfortable 8kw per rack in 2N+1 redundancy. And, it still

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