RE: Console Servers
My favorite are the lantronix SLC console servers. Fairly bullet-proof, they are one of those devices that just work. Can usually be picked up used ~$300 for 32 or 48 port varieties in good condition if you aren’t in the biggest hurry. Sk. From: NANOG On Behalf Of Alan Hannan Sent: Tuesday, September 18, 2018 9:37 AM To: NANOG Subject: Console Servers I'd like your input on suggestions for an alternate serial port manager. Long ago I used Cisco 2511/2611 and was fairly happy. A little later I used portmaster and was less so. Recently I've been using Opengear and they work fairly well but the price is fairly high. I use the CM7100 and IM7100. General specs I'm looking for are: * 8 to 48 or more rs232 serial ports on rj45 * nice-to-have software selectable pinouts (cisco v. straight) * gig-e ethernet port (100mbps ok) * 1U form factor * redundant AC power * access physical serial connections via local port # * access physical serial connections via local IP alias (nice to have) Can you recommend a serial port server/concentrator that I could use in place of opengear for a better value and/or lower cost? I'm just ignorant about the current market for serial port concentrators and so far web searches have not revealed ideas, so your input is appreciated! Thanks! -alan
RE: Ear protection
For years we have used the Peltor/3M Bluetooth headsets in the datacenter. Proper hearing protection and noise cancelling mic, with the added bonus of protecting my head a bit when I am up on the ladder in the DC and can easily bang into potentially sharp things. http://goo.gl/ShTCEF They are about $375-$450ish retail, we picked some up on ebay in around $200 brand new. We have about 6 pairs that so far have lasted 8-9+ years with no problems. The only major suggestion if you are going to use them on a regular basis is to get the gel earcup replacements. These seem to be about $60ish. Sk. -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Nick Hilliard Sent: Wednesday, September 23, 2015 5:34 AM To: nanog@nanog.org Subject: Ear protection What are people using for ear protection for datacenters these days? I'm down to my last couple of corded 3M 1110: http://www.shop3m.com/3m-corded-earplugs-hearing-conservation-1110.html These work reasonably well in practice, with a rated nominal noise reduction rate of 29dB. Some people find them uncomfortable, but they work well for me. There are other ear plugs with rated NRR of up to 32-33dB. Anyone have any opinions on what brands work well for them? Nick
RE: Looking for information on IGP choices in dual-stack networks
Think of scenarios where you have mergers/acquisitions where different portions of the now amalgamated network were designed differently and there may be too much pain or require too much time to redesign rather than bolt together and redistribute. Sk. -Original Message- that confuses me, the logic I mean... I suppose in a single network I'd expect to see one igp for an address family (ospf or ospfv3). Not eastcoast devices do ospf (stodgy bastards!) and westcoast goes isis!
RE: Recommended 10GE ISCSI SAN switch
If price is a major concern, take a look at the Force10 S2410. They tend to go for under $2k on ebay. Very basic L2 cut-through low-latency switch. Only drawback is your choice is XFP or CX4 for ports, but if you have server nics with CX4 then you are off the races for very little money. Whatever switch you use, don't forget to adjust MTU to 9k+. +1 for SSD based storage, if you are using a vmware environment the newer versions of vsan support all-flash-arrays, worth taking a look at. Sk. -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Matt Taylor Sent: Tuesday, May 12, 2015 9:36 PM To: nanog@nanog.org Subject: Re: Recommended 10GE ISCSI SAN switch We've been using Dell 8024F's for over 2 years now. No problems at all. On 12/05/2015 23:36, Paul S. wrote: Hi guys, We're shortly going to be getting some 10G SANs, and I was wondering what people were using as SAN switches for 10G SANs. It is my understanding that low buffer sizes make most 'normal' 10G ethernet switches unsuitable for the job. We're pretty much an exclusive Juniper shop, but are not biased in any way -- best tool for the job is what I've been tasked with to find. Keeping that in mind, how would something like a EX4550 fare in the role? Are there better devices in the same price range? Thanks!
RE: Thousands of hosts on a gigabit LAN, maybe not
You may want to look at CLOS / leaf/spine architecture. This design tends to be optimized for east-west traffic, scales easily as bandwidth needs grow, and keeps thing simple, l2/l3 boundry on the ToR switch, L3 ECMP from leaf to spine. Not a lot of complexity and scale fairly high on both leafs and spines. Sk. -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of John Levine Sent: Friday, May 08, 2015 2:53 PM To: nanog@nanog.org Subject: Thousands of hosts on a gigabit LAN, maybe not Some people I know (yes really) are building a system that will have several thousand little computers in some racks. Each of the computers runs Linux and has a gigabit ethernet interface. It occurs to me that it is unlikely that I can buy an ethernet switch with thousands of ports, and even if I could, would I want a Linux system to have 10,000 entries or more in its ARP table. Most of the traffic will be from one node to another, with considerably less to the outside. Physical distance shouldn't be a problem since everything's in the same room, maybe the same rack. What's the rule of thumb for number of hosts per switch, cascaded switches vs. routers, and whatever else one needs to design a dense network like this? TIA R's, John
Cisco/Level3 takedown
Was just reading http://blogs.cisco.com/security/talos/sshpsychos then checking my routing tables. Looks like the two /23's they mention are now being advertised as /24's, and I'm also not sure why cisco published the ssh attack dictionary. It seems to me that this is something that if they want to do, they should be working with entire service provider community, not just one provider. Thanks Sameer Khosla Managing Director Neutral Data Centers Corp. Twitter: @skhoslaTO
RE: Incident notification
I know of a firend that is using Growl / Prowl to push out the notifications to their phones, even to their TV's at home. Sk. -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Thijs Stuurman Sent: Friday, November 21, 2014 10:52 AM To: nanog@nanog.org Subject: Incident notification Nanog list members, I was looking at some statistic and noticed we are sending out a massive amount of SMS messages from our monitoring systems. This left me wondering if there isn't a better (and cheaper) alternative to this, something just as reliant but IP based. We all have smartphones these days anyway. Therefore my question, what are you using to notify admins of incidents? Kind regards / Met vriendelijke groet, Thijs Stuurman [IS Logo] IS Group Wielingenstraat 8 T +31 (0)299 476 185 i...@is.nlmailto:i...@is.nl 1441 ZR Purmerend F +31 (0)299 476 288 www.is.nlhttp://www.is.nl IS Group is ISO 9001:2008, ISO/IEC 27001:2005, ISO 20.000-1:2005, ISAE 3402 certified. De datacenters zijn PCI DSS en ISO 14001 compliant.
RE: Canadian Hosting Providers - how do you handle copyright and trademark complaints
My personal favorite is the number of notices that we receive as DMCA takedown notices, citing the specific laws. Most of the notices come from people who are unable to comprehend that US Laws don't apply outside of the US. Sk. -Original Message- From: J [mailto:na...@namor.ca] Subject: Re: Canadian Hosting Providers - how do you handle copyright and trademark complaints Voluntary notice-and-notice. Mostly automated based on ACNS reports that the majority do. Haven't really dealt any takedowns. On 13-06-04 06:44 PM, Landon wrote: Hello, I'm wondering how other Canadian Hosting Providers handle copyright and trademark complaints about customers on their network. I'm thinking of just handling them the same as a DMCA notification should be handled but since there's no forced takedown provisions in the Canadian copyright act (that I know of?) it's difficult to say what is better. I'd kind of like if our customers could enjoy some freedom from the sledgehammer of the DMCA *but* still being subject to copyright and trademark infringement laws of course. I have to admit - this is my ignorance. I'm quite familiar with the DMCA and the litigation that usually ensues during american trademark infringement already but not Canadian copyright laws or trademark laws. I do intend to consult with a real lawyer about this eventually but I want to have intelligent questions or suggestions before that happens. Also how are trademark infringement issues handled differently than copyright issues in Canada?
RE: Postini Exiting ISP Business?
We use mailfoundry internally ourselves, but I have a customer who has been raving about mimecast for years and I am on the verge of switching over to them. Thanks Sameer -Original Message- From: Erik Soosalu [mailto:erik.soos...@calyxinc.com] Sent: Tuesday, January 08, 2013 9:27 AM To: Paul Stewart; nanog@nanog.org Subject: RE: Postini Exiting ISP Business? I am an enterprise guy, but we've been running MS Forefront Online Protection for Exchange for a number of years with very few issues (that aren't determined by flags/polices we've set). The few issues that we have had have been with delayed SMTP handoffs between Hostopia (Bell's backend provider) and FOPE, but I haven't had reports of that for a couple of years. Thanks, Erik -Original Message- From: Paul Stewart [mailto:p...@paulstewart.org] Sent: Tuesday, January 08, 2013 8:51 AM To: nanog@nanog.org Subject: Postini Exiting ISP Business? Hey there. We have been using Postini for a number of years as our anti-spam/anti-virus protection for customer email accounts. Mid last year we received a notice from Google that In 2013, we plan to transition your Postini services to Google Apps for Business. As part of this notice we were also told You don't need to make any changes to your Postini service or sign up for a Google Apps account. Your Postini service will continue as usual until your migration begins. We will be in touch at least 60 days before your renewal date. In mid November, Google sent us a letter that stated that we had until the end of 2013 to basically get off their service or to contact their preferred partner (Tech Excel) and migrate to Google Apps with them. Recently we have now been told in email by someone at Postini that we must transition ASAP and that we really only had til the end of 2012. Geesh, talk about confusing.. Not a great way to treat a long term customer! Anyone else getting the complete run around by Postini? We are fine with leaving them, especially now. Having said that, I'm interested in hearing about competitive solutions either in appliances or in cloud based - this is *not* an invitation for sales people to call me please. Thanks, Paul
RE: Bandwidth Growth
-Original Message- From: Curran, David [mailto:david.cur...@windstream.com] The LINX, TORIX, and SIX graphs provided earlier, for example, seem relatively flat until the Nov. timeframe at which point they seem to seek a new higher normal. Could just be my lack of sleep and my biased opinion though. As one might infer, I'm trying to find evidence corroborating my own experiences. My theory being that all of those cool Internet connected toys (Blue Ray, TVs, Ipads, etc) that hit the market this past year have lead to a substantial increase in residential Internet traffic. If that were true, I guess I'd expect that enterprise oriented service providers would not see the same uptick as residential providers. Thanks again to all have responded (and anyone else that might still). David David, you may also want to try to correlate the addition of participants to the peering fabric to bandwidth growth. I know TorIX shows on their main page the date when new participants joined the exchange. http://www.torix.net/ For example, Microsoft jointed on 9/3/10. You may be able to see a rise in usage shortly after. Thanks Sameer
RE: Significant Announcement (re: IPv4) 3 February - Watch it Live!
Anyone else getting Error establishing a database connection trying to bring this up? Thanks Sameer -Original Message- From: John Curran [mailto:jcur...@arin.net] Sent: Tuesday, February 01, 2011 8:24 AM To: nanog@nanog.org list Subject: Significant Announcement (re: IPv4) 3 February - Watch it Live! FYI - Some people in this community may want to watch this event (either in person or via webcast) /John John Curran President and CEO ARIN Begin forwarded message: From: ARIN i...@arin.netmailto:i...@arin.net Date: February 1, 2011 7:09:02 AM EST To: arin-annou...@arin.netmailto:arin-annou...@arin.net Subject: [arin-announce] Significant Announcement 3 February - Watch it Live! On Thursday, 3 February 2011, at 9:30 AM Eastern Standard Time (EST), the Number Resource Organization (NRO), along with the Internet Corporation for Assigned Names and Numbers, the Internet Society (ISOC) and the Internet Architecture Board (IAB) will be holding a ceremony and press conference to make a significant announcement and to discuss the global transition to the next generation of Internet addresses. Much has been written in the international media over the last few weeks about the dwindling pool of Internet addresses using the original Internet protocol, called IPv4 (Internet Protocol version 4), and this topic will be addressed at the event. We invite all interested community members to view the webcast of this event at: http://www.nro.net/news/icann-nro-live-stream In the event you happen to be at the Intercontinental Hotel in Miami on Thursday, there will be limited public seating available to attend (with press receiving seating priority) in Room Concourse II at 9:30 AM EST for the ceremony and 10:00 AM for press conference which follows. Regards, Communications and Member Services American Registry for Internet Numbers (ARIN)
