Re: Comcast New England dropped for 5-15 min? Anyone
Looks like there were at least a couple of others that saw issues also. http://www.dslreports.com/forum/r29852647-Connectivity-Comcast-down-Quincy-MA Robert On Tue, 10 Feb 2015 21:52:29 -0500 Andrey Khomyakov khomyakov.and...@gmail.com wrote: My boss has comcast at home in Milton, MA, said all was fine. Must have been prefix specific. Trace would die somewhere in level3 at the time. Was tracing to 8.8.8.8 On Tuesday, February 10, 2015, Dan Brisson dbris...@uvm.edu wrote: FWIW...no problems here in Vermont on Comcast business. -dan Dan Brisson Network Engineer University of Vermont On 2/10/15 8:45 PM, Kevin Kadow wrote: On Tue, Feb 10, 2015 at 7:27 PM, Andrey Khomyakov khomyakov.and...@gmail.com wrote: Hey, anyone had problems just now? My team and I at homes lost internet access for about 10 min. I also had many sites drop off. Still digging, but maybe trouble upstream? I'm in 50.133.128.0/17 at home. You were only out for 10-15 minutes? More like an hour in New Hampshire. traceroutes would die out in Needham, Woburn, or whatever 4.68.127.229 is. -- Sent from Gmail Mobile
Re: Comcast New England dropped for 5-15 min? Anyone
Hi folks, There was a problem with some prefixes New England rerouting properly during a topology change. We feel that problem has been corrected and would like to know if there were other problems seen overnight (after UTC) in that region. If you send to me, please include specific time and source/destination IP address information. Thanks, Tony On Wed, Feb 11, 2015 at 1:50 PM, Chuck Anderson c...@wpi.edu wrote: 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. http://www.dslreports.com/forum/r29852647-Connectivity-Comcast-down-Quincy-MA Robert On Tue, 10 Feb 2015 21:52:29 -0500 Andrey Khomyakov khomyakov.and...@gmail.com wrote: My boss has comcast at home in Milton, MA, said all was fine. Must have been prefix specific. Trace would die somewhere in level3 at the time. Was tracing to 8.8.8.8 On Tuesday, February 10, 2015, Dan Brisson dbris...@uvm.edu wrote: FWIW...no problems here in Vermont on Comcast business. -dan Dan Brisson Network Engineer University of Vermont On 2/10/15 8:45 PM, Kevin Kadow wrote: On Tue, Feb 10, 2015 at 7:27 PM, Andrey Khomyakov khomyakov.and...@gmail.com wrote: Hey, anyone had problems just now? My team and I at homes lost internet access for about 10 min. I also had many sites drop off. Still digging, but maybe trouble upstream? I'm in 50.133.128.0/17 at home. You were only out for 10-15 minutes? More like an hour in New Hampshire. traceroutes would die out in Needham, Woburn, or whatever 4.68.127.229 is.
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. http://www.dslreports.com/forum/r29852647-Connectivity-Comcast-down-Quincy-MA Robert On Tue, 10 Feb 2015 21:52:29 -0500 Andrey Khomyakov khomyakov.and...@gmail.com wrote: My boss has comcast at home in Milton, MA, said all was fine. Must have been prefix specific. Trace would die somewhere in level3 at the time. Was tracing to 8.8.8.8 On Tuesday, February 10, 2015, Dan Brisson dbris...@uvm.edu wrote: FWIW...no problems here in Vermont on Comcast business. -dan Dan Brisson Network Engineer University of Vermont On 2/10/15 8:45 PM, Kevin Kadow wrote: On Tue, Feb 10, 2015 at 7:27 PM, Andrey Khomyakov khomyakov.and...@gmail.com wrote: Hey, anyone had problems just now? My team and I at homes lost internet access for about 10 min. I also had many sites drop off. Still digging, but maybe trouble upstream? I'm in 50.133.128.0/17 at home. You were only out for 10-15 minutes? More like an hour in New Hampshire. traceroutes would die out in Needham, Woburn, or whatever 4.68.127.229 is.
Re: Comcast Static IP Changed With New Modem?
I've had a similar mistake happen with TWC. It's most likely a glitch in their config system which should use the gateway's mac address in order to assign a static IP on the docsis modem. Tech support should figure this out pretty quick without escalating it much further. I've had an instance where a second line/modem was added with the same gateway IP, and that brought us down for over a day until they got around to fixing it. My suggestions is to always keep your gateways/edges monitored with a service like Monitis. I use ping monitors every single minute from three different locations in the US (abroad available too) and get email/SMS/call whenever something fails once, twice, etc from one, two or more locations. Really cool monitoring system. Hope this helps. On Mon, Feb 9, 2015 at 10:32 AM, Justin Krejci jkre...@usinternet.com wrote: Has anyone run into the situation where their static IP address from Comcast (on the business class cable modem Internet service) was changed when the modem was replaced? We have a remote site that uses Comcast as a backup Internet connection and when we went to use it recently our VPN tunnel would not establish. After working with the Comcast support group we discovered Comcast changed our static IP address. I am working through trying to figure out the when and the why with Comcast still and suspect it was changed when the modem was replaced back in December. The modem was replaced by Comcast as our previous modem was apparently EOL'ed. We're now setting up additional monitoring to verify the accessibility of our remote site via the Comcast connection so we don't have any future uh-ohs when we need to use our backup connection and it too is not fully functional. TIA, -Justin
Re: Comcast New England dropped for 5-15 min? Anyone
Since, we reduced ourselves to the level of troubleshooting consumer home access on a cable network. I can let you know that this happens to me at home, in silicon valley area of California routinely several times a week. In fact, so much that I have ATT, Comcast and Verizon hot spot for the rare event it happens to the first two at the same time. I simply flip between access points. The only thing I found worth the time it to test from home is to the destination points where our network has sessions with ATT, Comcast, etc.. With more than one consumer provider at here at home, it have happens often enough and it becomes clear that it's rarely worth the effort to troubleshoot from a consumer end point, unless of course if you work for them. Thank You Bob Evans CTO Hey, anyone had problems just now? My team and I at homes lost internet access for about 10 min. I also had many sites drop off. Still digging, but maybe trouble upstream? I'm in 50.133.128.0/17 at home. --Andrey
Re: Comcast New England dropped for 5-15 min? Anyone
It wasn't intended to start troubleshooting end user's internet. It was more to know what is up when my customer hold queue goes up to a couple of thousand calls on hold and my monitoring system lights up like a christmas tree. --Andrey On Wed, Feb 11, 2015 at 9:12 AM, Bob Evans b...@fiberinternetcenter.com wrote: Since, we reduced ourselves to the level of troubleshooting consumer home access on a cable network. I can let you know that this happens to me at home, in silicon valley area of California routinely several times a week. In fact, so much that I have ATT, Comcast and Verizon hot spot for the rare event it happens to the first two at the same time. I simply flip between access points. The only thing I found worth the time it to test from home is to the destination points where our network has sessions with ATT, Comcast, etc.. With more than one consumer provider at here at home, it have happens often enough and it becomes clear that it's rarely worth the effort to troubleshoot from a consumer end point, unless of course if you work for them. Thank You Bob Evans CTO Hey, anyone had problems just now? My team and I at homes lost internet access for about 10 min. I also had many sites drop off. Still digging, but maybe trouble upstream? I'm in 50.133.128.0/17 at home. --Andrey
Re: MultiMode Fiber Connectivity... (850nm) Power Question
Faisal, You don't need to worry about power range when connecting SR or LR. However, an ER or ZR on a loopback can damage Rx. The strength of the receiving signal is always under the tolerance allowed. The 850nm Light is attenuated very quickly because of the MMF and the 850nm light source. This light source is more like an LED than a Laser. The MTTF on any transceiver is 50,000 hours at room temperature. A bigger factor is high temperature, because the chip is a semiconductor. Eric Litvin President e...@lumaoptics.net Direct: (650)440-4382 Mobile:(*650)996-7270* Fax: (650) 618-1870 On Wed, Feb 11, 2015 at 12:48 PM, Faisal Imtiaz fai...@snappytelecom.net wrote: Hello, I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) Regards Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net -- Eric Litvin President e...@lumaoptics.net Direct: (650)440-4382 Mobile:(*650)996-7270 650%29996-7270* Fax: (650) 618-1870
Re: MultiMode Fiber Connectivity... (850nm) Power Question
Thank You Bob Evans CTO Hello, I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? Yes, but thats only true about single mode frequencies not multimode (MM) because those are not as powerful. All MM is expected to go a very limited distance, so levels are never high. We have MM 3 foot jumpers between gear running for years. (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) Regards Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
MultiMode Fiber Connectivity... (850nm) Power Question
Hello, I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) Regards Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
Re: MultiMode Fiber Connectivity... (850nm) Power Question
Thank you guys (Bob, Brandon Eric) for the prompt answer. Regards. Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net - Original Message - From: Bob Evans b...@fiberinternetcenter.com To: Faisal Imtiaz fai...@snappytelecom.net Cc: NANOG nanog@nanog.org Sent: Wednesday, February 11, 2015 4:06:23 PM Subject: Re: MultiMode Fiber Connectivity... (850nm) Power Question Thank You Bob Evans CTO Hello, I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? Yes, but thats only true about single mode frequencies not multimode (MM) because those are not as powerful. All MM is expected to go a very limited distance, so levels are never high. We have MM 3 foot jumpers between gear running for years. (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) Regards Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
Re: MultiMode Fiber Connectivity... (850nm) Power Question
On Wed, 11 Feb 2015, Faisal Imtiaz wrote: I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? SX (1G) / SR (10G) / SR10 (100G) gear generally has a receive threshold that's higher than the maximum launch power. They are designed for short-reach applications (in-building, data center, etc), so no attenuation is needed. Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) On short-reach optics, this should never be a problem. On long-reach optics, receiver saturation will generally result in link errors/flaps, and possibly high rx power warnings (depending on the gear on the receiving end), however, these can be addressed using in-line attenuators. On very long-reach optics, such as ZX (1G) and ER/ZR (10G), it is possible to damage the receivers with too hot of a signal because they are designed for long spans and a certain amount of distance-based attenuation is factored into the optical power budget. jms
Re: MultiMode Fiber Connectivity... (850nm) Power Question
Thanks Justin... Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net - Original Message - From: Justin M. Streiner strei...@cluebyfour.org To: NANOG nanog@nanog.org Sent: Wednesday, February 11, 2015 12:41:23 PM Subject: Re: MultiMode Fiber Connectivity... (850nm) Power Question On Wed, 11 Feb 2015, Faisal Imtiaz wrote: I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? SX (1G) / SR (10G) / SR10 (100G) gear generally has a receive threshold that's higher than the maximum launch power. They are designed for short-reach applications (in-building, data center, etc), so no attenuation is needed. Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) On short-reach optics, this should never be a problem. On long-reach optics, receiver saturation will generally result in link errors/flaps, and possibly high rx power warnings (depending on the gear on the receiving end), however, these can be addressed using in-line attenuators. On very long-reach optics, such as ZX (1G) and ER/ZR (10G), it is possible to damage the receivers with too hot of a signal because they are designed for long spans and a certain amount of distance-based attenuation is factored into the optical power budget. jms
RE: MultiMode Fiber Connectivity... (850nm) Power Question
Usually on Multi-mode and Low-power single-mode optics the MaxOutputOpticalPower is less than or equal to the MaxInputOpticalPower, so it's not necessary to attenuate. The trade-off is optimized optics versus having an attenuator sticking out the front of the electronics. Something along the lines of -9.5 to -4 transmit power and -18 to 0 on the Receive power. Multi-Mode optics tend to be more application specific than single-mode A good rule of thumb is keep a minimum of 4dB off the bottom plus 20% of the optical budget, discounting any specific application the above optic would be optimal around -10dB. Daniel Jameson Manager - IP Network Engineering TDS Telecom -Original Message- From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Faisal Imtiaz Sent: Wednesday, February 11, 2015 2:48 PM To: NANOG Subject: MultiMode Fiber Connectivity... (850nm) Power Question Hello, I was looking for feedback on the following question:- When connecting two MM SFP/SFP+/XFP 's together...(short range). What should be the best practice receive power range ? Is it true that if the rx power is higher than (x?) then it shortens the life of the optics ? (assumption being made here is that MAX Rx Power is not being exceed as per the spec sheets of the optics) Regards Faisal Imtiaz Snappy Internet Telecom 7266 SW 48 Street Miami, FL 33155 Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net
Call for Presentations - CHI-NOG 05
*Call for Presentations* CHI-NOG 05 (Chicago Network Operators Group) May 14th 2015, Chicago, IL The Chicago Network Operators Group (CHI-NOG) is a vendor neutral organization of the networking industry. Our goal is to create a regional community of network professionals by presenting the latest technology trends, enabling collaboration, providing networking opportunities and offering certification advice. CHI-NOG will be hosting its first full-day conference on May 14th. For more information please see http://chinog.org. The CHI-NOG Program Committee is seeking proposals for presentations on relevant networking technologies with a focus on the following topics: * Network Automation * Interconnection/Peering/Cloud Exchanges * Low Latency Networks * Network Security * Internet Monitoring * Advanced BGP/MPLS Technologies * Software Define Networking * Cloud Networking Technologies * Network Operation * Networking Research and Reach Infrastructure * Open Source Networking Tools * Industry Certification *Session Format* Each presentation is 30 minutes, which includes a question and answer session. The duration can be extended per individual request to 60 minutes and will be considered by the program committee. Presentations should not contain any marketing material and should avoid discussion of commercial products but rather focus on the underlying technology. *Key Dates* * Call for Presentations 2/11/15 * Presentation Abstract Submission Deadline --- 3/11/15 * Abstract Selection 3/18/15 * Presentation Full Slides Submission Deadline - 4/15/15 * Final Selection - 4/29/15 * Conference - 5/14/15 *Submission* Please submit presentation’s abstract proposal by filling out the submission form (http://chinog.org/meetings/chi-nog-05/abstract-submission/ ). Once your presentation is selected please provide the program committee with your photo and a short bio for web publication. The program committee is looking forward to your submission and attendance at the conference.
Level3 routing issues today?
Has anyone else having issues with Level3 routing traffic to the Godaddy ASN? Since about 1PM Eastern today we have had numerous customers claiming their internet was down, when it has only been a few websites they couldn't reach. It's been up and down on My FiOS link some today as well. But right Verizon seems fine they are hitting Qwest before Godaddy for where I live in VA. From our network. (AS30259) we are going out (AS3356) and for the most part we reach our peering router in Northern Va, the we see 4.34.191.254 before time outs forever. Could this be a regional Level3 issues? Anyone from Level3 or GoDaddy that could comment? We have had an open Level3 ticket since about 4PM Eastern. Sincerely, Nick Ellermann - CTO VP Cloud Services BroadAspect E: nellerm...@broadaspect.commailto:nellerm...@broadaspect.com P: 703-297-4639 F: 703-996-4443 THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
Re: FTTx Active-Ethernet Hardware
Hi, Price and functionality-wise Planet MGSW-28240F and GSD-1020S look pretty close to what I'm looking for. Anyone have real experience with using them on a large scale? Performance? Thank you for the pointer to MGSW-28240F. I am also curious to hear some feedback as the gear is awfully low-priced :) Denis
a hack for dealing with lack of control/data plane congruence at ix with rs
https://datatracker.ietf.org/doc/draft-ymbk-idr-rs-bfd/
Any recommendations for FXS/FXO hardware with Cisco Unified CME
Folks: Since a lot of NSPs are also in the VoIP business, I was wondering if anyone has specific recommendations for low-density (2-8 ports) FXS/FXO hardware that they are using with Cisco PBX devices. (And I guess T1/E1 as well.) I know that typical IOS boxes can take modules/interfaces/whatever to handle FXS/FXO/T1/E1, but I'm trying to put some electrical distance between the Cisco PBX and the phone company to keep environmental problems (lightning, mostly) from blowing up the PBX. Cisco themselves seem to have cancelled almost all of their low-end hardware, leaving us with Sipura/Linksys. I have had good results with Audiocodes+Asterisk, but not in the Cisco PBX environment. Does anyone have boots-on-the-ground knowledge of good analog gateway choices that play very nicely with Cisco PBX? jms -- Joel M Snyder, 1404 East Lind Road, Tucson, AZ, 85719 Senior Partner, Opus One Phone: +1 520 324 0494 j...@opus1.comhttp://www.opus1.com/jms
Re: Any recommendations for FXS/FXO hardware with Cisco Unified CME
You may want to ask on the cisco-voip list as it’s most centrally focused on that. Do you mean with CM or CME (as suggested in your subject line?) We have generally been abandoning the Cisco devices as they haven’t released an ‘open’ phone in many years outside of what you mentioned, sipura/linksys. I’m similarly looking for a “good” handset of build quality like the 7940/7960 that doesn’t require CM, handles being behind NAT/nat traversal properly and can provision securely over a TCP transport. We have been provisioning PAP2T for people who need the single ports and been using the Cisco ISRs to do T1/E1 where we can’t talk SIP directly to someone. - Jared On Feb 11, 2015, at 7:10 AM, Joel M Snyder joel.sny...@opus1.com wrote: Folks: Since a lot of NSPs are also in the VoIP business, I was wondering if anyone has specific recommendations for low-density (2-8 ports) FXS/FXO hardware that they are using with Cisco PBX devices. (And I guess T1/E1 as well.) I know that typical IOS boxes can take modules/interfaces/whatever to handle FXS/FXO/T1/E1, but I'm trying to put some electrical distance between the Cisco PBX and the phone company to keep environmental problems (lightning, mostly) from blowing up the PBX. Cisco themselves seem to have cancelled almost all of their low-end hardware, leaving us with Sipura/Linksys. I have had good results with Audiocodes+Asterisk, but not in the Cisco PBX environment. Does anyone have boots-on-the-ground knowledge of good analog gateway choices that play very nicely with Cisco PBX? jms -- Joel M Snyder, 1404 East Lind Road, Tucson, AZ, 85719 Senior Partner, Opus One Phone: +1 520 324 0494 j...@opus1.comhttp://www.opus1.com/jms
Re: Any recommendations for FXS/FXO hardware with Cisco Unified CME
On 2/11/15 2:24 PM, Jared Mauch wrote: You may want to ask on the cisco-voip list as it’s most centrally focused on that. Thanks, will ask on the list. Do you mean with CM or CME (as suggested in your subject line?) In this case, it's CME that I'm asking about. I’m similarly looking for a “good” handset Have you taken a look at the Polycom IP phones? The physical quality is as good or better than Cisco, in my opinion (having used both a lot). And, you can provision with HTTPS secured by username/password, and if you really want you can use client/server TLS (i.e., both ends authenticate each other with certificates) for both HTTPS provisioning and for SIP signalling. jms -- Joel M Snyder, 1404 East Lind Road, Tucson, AZ, 85719 Senior Partner, Opus One Phone: +1 520 324 0494 j...@opus1.comhttp://www.opus1.com/jms
Re: FTTx Active-Ethernet Hardware
hey, I understand it is now being replaced by the ASR920, which is a little odd if you look at port density differences between the two alone. It is being replaced by ASR-920-24SZ-M - 24GE Fiber and 4-10GE: Modular PSU. I don't think this ASR920 has been announced yet :) -- tarko
Re: FTTx Active-Ethernet Hardware
http://www.cisco.com/c/en/us/products/collateral/routers/asr-920-series-aggregation-services-router/datasheet-c78-733397.html Aled On 11 February 2015 at 12:49, Tarko Tikan ta...@lanparty.ee wrote: hey, I understand it is now being replaced by the ASR920, which is a little odd if you look at port density differences between the two alone. It is being replaced by ASR-920-24SZ-M - 24GE Fiber and 4-10GE: Modular PSU. I don't think this ASR920 has been announced yet :) -- tarko
