Re: NUD- ipV6.
Hi, Not useful for router-router link. However it is very useful for first-hop redundancy in data center environment - if you cannot implement VRRP for some reason. Best Regards, Janos Mohacsi Head of HBONE+ project Network Engineer, Director Network and Multimedia NIIF/HUNGARNET, HUNGARY Co-chair of Hungarian IPv6 Forum Key 70EF9882: DEC2 C685 1ED4 C95A 145F 4300 6F64 7B00 70EF 9882 On Thu, 3 May 2012, S, Somasundaram (Somasundaram) wrote: Hi Everyone, Would like to hear from you on the significance of IPV6 Neighbor Unreachability detection (NUD) specifically on the Router-Router link. While quick failure detection protocols like BFD are already present to detect the liveliness of the neighbor, does the providers/operators find NUD to be useful? Rgds/ Somasundaram
Re: mulcast assignments
Hi, All modern routers support mapping from IGMPv2 to PIM SSM, all static, some others thru DNS, etc Regards, Jeff On May 3, 2012, at 12:34 PM, Nick Hilliard n...@foobar.org wrote: On 03/05/2012 21:00, Greg Shepherd wrote: Sure, but GLOP predated SSM, and was really only an interim fix for the presumed need of mcast address assignments. GLOP only gives you a /24 for each ASN where SSM gives you a /8 for every unique unicast address you have along with vastly superior security and network simplicity. SSM is indeed a lot simpler and better than GLOP in every conceivable way - except vendor support. It needs igmpv3 on all intermediate devices and SSM support on the client device. All major desktop operating systems now have SSM support (OS/X since 10.7/Lion), but there is still lots of older hardware which either doesn't support igmpv3 or else only supports it in a very primitive fashion. This can lead to Unexpected Behaviour in naive roll-outs. Nick
Re: POTS Ending (Re: Operation Ghost Click)
Curious to know if naked DSL (DSL without dialtone POTS link) is common in North America? We don't have that available here in India yet apart from fact that PSTN IP connectivity is banned which brings up back to GSM/CDMA and POTS option. On Thu, May 3, 2012 at 8:47 PM, Brandt, Ralph ralph.bra...@pateam.comwrote: Connecticut has such a bill pending. My suggestion to people there, Get a ham radio license and a 2 meter transceiver with a car adapter... Ralph Brandt York PA -Original Message- From: Jared Mauch [mailto:ja...@puck.nether.net] Sent: Wednesday, May 02, 2012 11:29 PM To: Frank Bulk Cc: NANOG list Subject: POTS Ending (Re: Operation Ghost Click) On May 2, 2012, at 9:42 PM, Frank Bulk wrote: Many states have regulations regarding how long dial tone needs to last during a power outage. Iowa's PUC (the IUB) requires at least two hours of backup power. We design ours for eight hours. One thing of note that I've been tracking is this: http://www.usatoday.com/news/nation/story/2012-04-16/landline-service-be coming-obsolete/54321184/1 I'm somewhat dubious about the following claims on the part of the carrier. This is a carrier that wants to meter your cellular data but provides wifi service inferior to the cellular data to offload their wireless network. -- snip -- Bill sponsors and phone companies including ATT say deregulating land-line phone service will increase competition and allow carriers to invest in better technology rather than expand a dying service. Some consumer organizations fear the change will hurt affordable service, especially in rural areas. -- snip -- - Jared -- Anurag Bhatia anuragbhatia.com or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected network! Linkedin http://in.linkedin.com/in/anuragbhatia21 | Twitterhttps://twitter.com/anurag_bhatia| Google+ https://plus.google.com/118280168625121532854
Re: Network diagram app that shows realtime link utilizatin
I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for monitoring via Zenpacks. http://community.zenoss.org On Fri, May 4, 2012 at 7:09 AM, Mike Devlin mdev...@aisle10.net wrote: Check out InterMapper (http://www.intermapper.com/) Its java based, but works real well -- Anurag Bhatia anuragbhatia.com or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected network! Linkedin http://in.linkedin.com/in/anuragbhatia21 | Twitterhttps://twitter.com/anurag_bhatia| Google+ https://plus.google.com/118280168625121532854
Verizon 1xRTT/EVDO for OOB
Is anyone using Verizon 1xRTT/EVDO (3G) for OOB work? I'm trying to sort out how exactly to order a compatible service from them. Unfortunately I don't manage our Verizon Wireless relationship, so I need to be specific. Is there a service code or name they refer to this service as? Looking for low bandwidth, static IP. -cjp
Re: Verizon 1xRTT/EVDO for OOB
Call a business sales rep and ask for telemetry or Machine to Machine data plans. On Fri, May 4, 2012 at 10:53 AM, Christopher J. Pilkington c...@0x1.netwrote: Is anyone using Verizon 1xRTT/EVDO (3G) for OOB work? I'm trying to sort out how exactly to order a compatible service from them. Unfortunately I don't manage our Verizon Wireless relationship, so I need to be specific. Is there a service code or name they refer to this service as? Looking for low bandwidth, static IP. -cjp
RE: Verizon 1xRTT/EVDO for OOB
We've recently deployed our first Opengear ACM5004-G http://opengear.com/product-acm5000-g.html and its working great. It has cellular (3G), ethernet, USB and four serial interfaces; you could easily daisy chain a serial interface to a terminal server if you need more OOB serial ports. The setup was very easy; our Verizon rep just required the ESN off the bottom of the unit since Opengear's already gone through Verizon's certification process so their devices' ESN's are known to Verizon as valid for their network. He asked what plan we wanted, I told him I wanted a static public IP, two days later we were up and running. Since this is considered a M2M (machine to machine) device, similar to alarm systems and other low bandwidth devices, you can get monthly plans down to $7 for a few megabytes and up to normal consumer-level 5 gigs for $50/month type plans. The static IP didn't add any cost. The device has a cool unique feature where you can set it to keep the cellular interface 'down' for data as its normal state so no one outside is trying to break into it or wasting your bandwidth. Then you send a text message to the phone number assigned to it and it will bring up the data interface so you can SSH in. You can configure firewall rules on it, use key-based auth, change the ssh port number, etc. David -Original Message- From: Christopher J. Pilkington [mailto:c...@0x1.net] Sent: Friday, May 04, 2012 10:53 AM To: nanog@nanog.org Subject: Verizon 1xRTT/EVDO for OOB Is anyone using Verizon 1xRTT/EVDO (3G) for OOB work? I'm trying to sort out how exactly to order a compatible service from them. Unfortunately I don't manage our Verizon Wireless relationship, so I need to be specific. Is there a service code or name they refer to this service as? Looking for low bandwidth, static IP. -cjp
NYC to DEU packet loss
Trying to troubleshoot packet loss from NYC to DEU. Traceroute shows: tdurack@2ua82715mg:~$ traceroute -I 194.25.250.73 traceroute to 194.25.250.73 (194.25.250.73), 30 hops max, 60 byte packets snip 4 216.55.2.85 (216.55.2.85) 1.694 ms 1.698 ms 1.698 ms 5 vb1010.rar3.nyc-ny.us.xo.net (216.156.0.17) 4.788 ms 4.792 ms 4.791 ms 6 207.88.14.178.ptr.us.xo.net (207.88.14.178) 1.684 ms 1.461 ms 1.452 ms 7 62.157.250.245 (62.157.250.245) 40.457 ms 42.980 ms 42.982 ms 8 hh-eb3-i.HH.DE.NET.DTAG.DE (62.154.32.134) 129.417 ms * 129.422 ms 9 194.25.250.73 (194.25.250.73) 139.501 ms 136.192 ms 139.236 ms Packet loss of approx. 20% affects hops 7 and 8, along with end host 9. Loss appears to be data-plane, not control-plane rate limiting. Affected customer confirms this too :-) 62.157.250.245 is in Deutsche Telekom address spaces, so I'm guessing this is either a DTAG problem or an issue between XO and DTAG. I have a ticket open with XO, but I'm having a hard time figuring out what is ~40ms away from NYC on a path to DEU. Any idea what the physical path is? -- Tim:
Re: NYC to DEU packet loss
You may cross check return path to XO if you have access to any sever on DTAG or from there looking glass if available. In many cases sudden latency spike comes because of incorrect return path. Hope this will help. (Sent from my mobile device) Anurag Bhatia http://anuragbhatia.com On May 4, 2012 9:32 PM, Tim Durack tdur...@gmail.com wrote: Trying to troubleshoot packet loss from NYC to DEU. Traceroute shows: tdurack@2ua82715mg:~$ traceroute -I 194.25.250.73 traceroute to 194.25.250.73 (194.25.250.73), 30 hops max, 60 byte packets snip 4 216.55.2.85 (216.55.2.85) 1.694 ms 1.698 ms 1.698 ms 5 vb1010.rar3.nyc-ny.us.xo.net (216.156.0.17) 4.788 ms 4.792 ms 4.791 ms 6 207.88.14.178.ptr.us.xo.net (207.88.14.178) 1.684 ms 1.461 ms 1.452 ms 7 62.157.250.245 (62.157.250.245) 40.457 ms 42.980 ms 42.982 ms 8 hh-eb3-i.HH.DE.NET.DTAG.DE (62.154.32.134) 129.417 ms * 129.422 ms 9 194.25.250.73 (194.25.250.73) 139.501 ms 136.192 ms 139.236 ms Packet loss of approx. 20% affects hops 7 and 8, along with end host 9. Loss appears to be data-plane, not control-plane rate limiting. Affected customer confirms this too :-) 62.157.250.245 is in Deutsche Telekom address spaces, so I'm guessing this is either a DTAG problem or an issue between XO and DTAG. I have a ticket open with XO, but I'm having a hard time figuring out what is ~40ms away from NYC on a path to DEU. Any idea what the physical path is? -- Tim:
Re: mulcast assignments
On May 3, 2012, at 12:24 PM, Philip Lavine wrote: How do I get a registered multicast block? If you truly need a globally unique multicast block, and GLOP/RFC6034/SSM won't work, you can submit an application to IANA here: http://www.iana.org/form/multicast-ipv4 -- Andrew Hoyos hoy...@gmail.com
Weekly Routing Table Report
This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, AusNOG, SANOG, PacNOG, LacNOG, TRNOG, CaribNOG and the RIPE Routing Working Group. Daily listings are sent to bgp-st...@lists.apnic.net For historical data, please see http://thyme.rand.apnic.net. If you have any comments please contact Philip Smith pfsi...@gmail.com. Routing Table Report 04:00 +10GMT Sat 05 May, 2012 Report Website: http://thyme.rand.apnic.net Detailed Analysis: http://thyme.rand.apnic.net/current/ Analysis Summary BGP routing table entries examined: 406993 Prefixes after maximum aggregation: 173163 Deaggregation factor: 2.35 Unique aggregates announced to Internet: 198390 Total ASes present in the Internet Routing Table: 40878 Prefixes per ASN: 9.96 Origin-only ASes present in the Internet Routing Table: 33126 Origin ASes announcing only one prefix: 15619 Transit ASes present in the Internet Routing Table:5471 Transit-only ASes present in the Internet Routing Table:141 Average AS path length visible in the Internet Routing Table: 4.5 Max AS path length visible: 64 Max AS path prepend of ASN ( 9902) 56 Prefixes from unregistered ASNs in the Routing Table: 402 Unregistered ASNs in the Routing Table: 131 Number of 32-bit ASNs allocated by the RIRs: 2663 Number of 32-bit ASNs visible in the Routing Table:2281 Prefixes from 32-bit ASNs in the Routing Table:5694 Special use prefixes present in the Routing Table:2 Prefixes being announced from unallocated address space:114 Number of addresses announced to Internet: 2544196464 Equivalent to 151 /8s, 165 /16s and 91 /24s Percentage of available address space announced: 68.6 Percentage of allocated address space announced: 68.7 Percentage of available address space allocated: 99.9 Percentage of address space in use by end-sites: 92.5 Total number of prefixes smaller than registry allocations: 174082 APNIC Region Analysis Summary - Prefixes being announced by APNIC Region ASes:99714 Total APNIC prefixes after maximum aggregation: 32251 APNIC Deaggregation factor:3.09 Prefixes being announced from the APNIC address blocks: 96165 Unique aggregates announced from the APNIC address blocks:39795 APNIC Region origin ASes present in the Internet Routing Table:4682 APNIC Prefixes per ASN: 20.54 APNIC Region origin ASes announcing only one prefix: 1239 APNIC Region transit ASes present in the Internet Routing Table:728 Average APNIC Region AS path length visible:4.7 Max APNIC Region AS path length visible: 20 Number of APNIC region 32-bit ASNs visible in the Routing Table:197 Number of APNIC addresses announced to Internet: 644332128 Equivalent to 38 /8s, 103 /16s and 186 /24s Percentage of available APNIC address space announced: 81.7 APNIC AS Blocks4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 131072-132095, 132096-133119 APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8, 49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8, 106/8, 110/8, 111/8, 112/8, 113/8, 114/8, 115/8, 116/8, 117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8, 124/8, 125/8, 126/8, 133/8, 175/8, 180/8, 182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8, 219/8, 220/8, 221/8, 222/8, 223/8, ARIN Region Analysis Summary Prefixes being announced by ARIN Region ASes:150460 Total ARIN prefixes after maximum aggregation:76455 ARIN Deaggregation factor: 1.97 Prefixes being announced from the ARIN address blocks: 121468 Unique aggregates announced from the ARIN address blocks: 50615 ARIN Region origin ASes present in the Internet Routing Table:15067 ARIN Prefixes per ASN: 8.06 ARIN Region origin ASes announcing only one prefix:
BGP Update Report
BGP Update Report Interval: 26-Apr-12 -to- 03-May-12 (7 days) Observation Point: BGP Peering with AS131072 TOP 20 Unstable Origin AS Rank ASNUpds % Upds/PfxAS-Name 1 - AS840267265 2.9% 34.0 -- CORBINA-AS OJSC Vimpelcom 2 - AS29049 53989 2.3% 129.8 -- DELTA-TELECOM-AS Delta Telecom LTD. 3 - AS982933372 1.4% 30.6 -- BSNL-NIB National Internet Backbone 4 - AS12479 28144 1.2% 120.3 -- UNI2-AS France Telecom Espana SA 5 - AS919827568 1.2% 109.0 -- KAZTELECOM-AS JSC Kazakhtelecom 6 - AS32528 25666 1.1%6416.5 -- ABBOTT Abbot Labs 7 - AS178522634 1.0% 12.0 -- AS-PAETEC-NET - PaeTec Communications, Inc. 8 - AS453821799 0.9% 4.0 -- ERX-CERNET-BKB China Education and Research Network Center 9 - AS702919731 0.8% 10.3 -- WINDSTREAM - Windstream Communications Inc 10 - AS24560 19089 0.8% 24.3 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 11 - AS845218838 0.8% 21.4 -- TE-AS TE-AS 12 - AS886617069 0.7% 39.1 -- BTC-AS Bulgarian Telecommunication Company Plc. 13 - AS17974 17032 0.7% 16.9 -- TELKOMNET-AS2-AP PT Telekomunikasi Indonesia 14 - AS28573 15644 0.7% 13.2 -- NET Servicos de Comunicao S.A. 15 - AS26615 14630 0.6% 18.4 -- Tim Celular S.A. 16 - AS211814368 0.6% 11.0 -- RELCOM-AS OOO NPO Relcom 17 - AS166014117 0.6% 181.0 -- ANS-CORP-NY - ANS Communications 18 - AS45899 14013 0.6% 42.6 -- VNPT-AS-VN VNPT Corp 19 - AS27738 13750 0.6% 25.0 -- Ecuadortelecom S.A. 20 - AS671312978 0.6% 26.4 -- IAM-AS TOP 20 Unstable Origin AS (Updates per announced prefix) Rank ASNUpds % Upds/PfxAS-Name 1 - AS44798 10303 0.4% 10303.0 -- PERVOMAYSK-AS PP SKS-Pervomaysk 2 - AS32528 25666 1.1%6416.5 -- ABBOTT Abbot Labs 3 - AS33283 0.1% 366.0 -- ASTELEK Tele-K Ltd. 4 - AS325411320 0.1%1320.0 -- SAIRB-AS - Schulman Associates Institutional Review Board, Inc. 5 - AS174083099 0.1%1033.0 -- ABOVE-AS-AP AboveNet Communications Taiwan 6 - AS55665 990 0.0% 990.0 -- STMI-AS-ID PT Sampoerna Telemedia Indonesia 7 - AS132631872 0.1% 936.0 -- HAYATNET-AS HayatNet Bilgi ve Iletisim Hizmetleri A.S 8 - AS34043 910 0.0% 910.0 -- RISS Internet Security Systems SRL 9 - AS36955 902 0.0% 902.0 -- Matrix-ASN1 10 - AS4658 875 0.0% 875.0 -- NETFRONT-AS Netfront Information Technology Limited, 11 - AS35155 704 0.0% 704.0 -- VERBASOFT-AS Verbasoft ASN 12 - AS1355 699 0.0% 699.0 -- AHMSI-HQDC - American Home Mortgage Servicing, Inc. 13 - AS57767 687 0.0% 687.0 -- RTTC-AS Federal State-owned Enterprise Russian Television and Radio Broadcasting Network 14 - AS369481304 0.1% 652.0 -- KENIC 15 - AS33074 627 0.0% 627.0 -- ISC-NBO1 Internet Systems Consortium, Inc. 16 - AS500267703 0.3% 481.4 -- KODOTEL-LTD-AS Kodotel Ltd 17 - AS38857 925 0.0% 462.5 -- ESOFT-TRANSIT-AS-AP e.Soft Technologies Ltd. 18 - AS36029 437 0.0% 437.0 -- CASAS - CASAS 19 - AS49072 430 0.0% 430.0 -- APSUARA-AS TCA Apsuara Ltd. 20 - AS37303 846 0.0% 423.0 -- AIRTELMADA TOP 20 Unstable Prefixes Rank Prefix Upds % Origin AS -- AS Name 1 - 130.36.34.0/2412815 0.5% AS32528 -- ABBOTT Abbot Labs 2 - 130.36.35.0/2412815 0.5% AS32528 -- ABBOTT Abbot Labs 3 - 91.202.212.0/22 10303 0.4% AS44798 -- PERVOMAYSK-AS PP SKS-Pervomaysk 4 - 62.36.252.0/22 8120 0.3% AS12479 -- UNI2-AS France Telecom Espana SA 5 - 41.43.147.0/24 7890 0.3% AS8452 -- TE-AS TE-AS 6 - 62.36.249.0/24 6439 0.3% AS12479 -- UNI2-AS France Telecom Espana SA 7 - 62.36.241.0/24 6076 0.2% AS12479 -- UNI2-AS France Telecom Espana SA 8 - 62.36.210.0/24 5943 0.2% AS12479 -- UNI2-AS France Telecom Espana SA 9 - 194.63.9.0/24 5595 0.2% AS1273 -- CW Cable and Wireless Worldwide plc 10 - 182.64.0.0/16 4360 0.2% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 11 - 202.56.215.0/243521 0.1% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 12 - 193.105.129.0/24 3283 0.1% AS3 -- ASTELEK Tele-K Ltd. 13 - 202.153.174.0/24 3095 0.1% AS17408 -- ABOVE-AS-AP AboveNet Communications Taiwan 14 - 122.161.0.0/16 2688 0.1% AS24560 -- AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., Telemedia Services 15 - 115.170.128.0/17 2387 0.1% AS4847 -- CNIX-AP China Networks Inter-Exchange 16 - 215.65.61.0/24 1753 0.1% AS5800 --
The Cidr Report
This report has been generated at Fri May 4 21:12:28 2012 AEST.
The report analyses the BGP Routing Table of AS2.0 router
and generates a report on aggregation potential within the table.
Check http://www.cidr-report.org for a current version of this report.
Recent Table History
Date PrefixesCIDR Agg
27-04-12411252 239358
28-04-12409883 239786
29-04-12409974 239790
30-04-12409910 240936
01-05-12415235 241036
02-05-12415226 239890
03-05-12410389 239955
04-05-12410788 240155
AS Summary
41002 Number of ASes in routing system
17121 Number of ASes announcing only one prefix
3425 Largest number of prefixes announced by an AS
AS6389 : BELLSOUTH-NET-BLK - BellSouth.net Inc.
112063456 Largest address span announced by an AS (/32s)
AS4134 : CHINANET-BACKBONE No.31,Jin-rong Street
Aggregation Summary
The algorithm used in this report proposes aggregation only
when there is a precise match using the AS path, so as
to preserve traffic transit policies. Aggregation is also
proposed across non-advertised address space ('holes').
--- 04May12 ---
ASnumNetsNow NetsAggr NetGain % Gain Description
Table 410105 240096 17000941.5% All ASes
AS6389 3425 197 322894.2% BELLSOUTH-NET-BLK -
BellSouth.net Inc.
AS7029 3414 1798 161647.3% WINDSTREAM - Windstream
Communications Inc
AS4766 2506 1031 147558.9% KIXS-AS-KR Korea Telecom
AS22773 1592 128 146492.0% ASN-CXA-ALL-CCI-22773-RDC -
Cox Communications Inc.
AS18566 2092 705 138766.3% COVAD - Covad Communications
Co.
AS28573 1825 492 133373.0% NET Servicos de Comunicao S.A.
AS4323 1607 385 122276.0% TWTC - tw telecom holdings,
inc.
AS1785 1899 801 109857.8% AS-PAETEC-NET - PaeTec
Communications, Inc.
AS4755 1575 531 104466.3% TATACOMM-AS TATA
Communications formerly VSNL
is Leading ISP
AS10620 1854 859 99553.7% Telmex Colombia S.A.
AS7552 1178 217 96181.6% VIETEL-AS-AP Vietel
Corporation
AS7303 1371 442 92967.8% Telecom Argentina S.A.
AS26615 904 33 87196.3% Tim Celular S.A.
AS8151 1478 659 81955.4% Uninet S.A. de C.V.
AS18101 947 159 78883.2% RELIANCE-COMMUNICATIONS-IN
Reliance Communications
Ltd.DAKC MUMBAI
AS4808 1110 350 76068.5% CHINA169-BJ CNCGROUP IP
network China169 Beijing
Province Network
AS17974 1866 1139 72739.0% TELKOMNET-AS2-AP PT
Telekomunikasi Indonesia
AS9394 845 159 68681.2% CRNET CHINA RAILWAY
Internet(CRNET)
AS7545 1679 1014 66539.6% TPG-INTERNET-AP TPG Internet
Pty Ltd
AS13977 765 121 64484.2% CTELCO - FAIRPOINT
COMMUNICATIONS, INC.
AS3356 1098 461 63758.0% LEVEL3 Level 3 Communications
AS30036 1424 789 63544.6% MEDIACOM-ENTERPRISE-BUSINESS -
Mediacom Communications Corp
AS17676 691 75 61689.1% GIGAINFRA Softbank BB Corp.
AS19262 998 402 59659.7% VZGNI-TRANSIT - Verizon Online
LLC
AS22561 1000 406 59459.4% DIGITAL-TELEPORT - Digital
Teleport Inc.
AS24560 1027 444 58356.8% AIRTELBROADBAND-AS-AP Bharti
Airtel Ltd., Telemedia
Services
AS3549 1023 445 57856.5% GBLX Global Crossing Ltd.
AS4780 809 254 55568.6% SEEDNET Digital United Inc.
AS22047 582 31 55194.7% VTR BANDA ANCHA S.A.
AS4804 644 96 54885.1% MPX-AS Microplex PTY LTD
Total 43228146232860566.2% Top 30 total
Possible
Re: Network diagram app that shows realtime link utilizatin
Anurag Bhatia wrote: I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for I remember someone here saying that real time monitoring gives you useless results, because if you make the time of measurement small enough the utilisation becomes 100%. Measurement of throughput is how many times this happens during a particular time interval. I hope I remembered right. Reminds me of http://en.wikipedia.org/wiki/Parmenides#The_Way_of_Truth Moreover he argued that movement was impossible because it requires moving into the void, and Parmenides identified the void with nothing, and therefore (by definition) it does not exist. That which does exist is The Parmenidean One, which is timeless, uniform, and unchanging -- Earthquake Magnitude: 3.3 Date: Friday, May 4, 2012 05:16:08 UTC Location: Island of Hawaii, Hawaii Latitude: 19.4332; Longitude: -155.2877 Depth: 2.40 km
Re: mulcast assignments
On Fri, May 4, 2012 at 2:53 AM, Jeff Tantsura jeff.tants...@ericsson.com wrote: Hi, All modern routers support mapping from IGMPv2 to PIM SSM, all static, some others thru DNS, etc I am not sure what you mean here. To support SSM, you need IGMPv3. Most routers do support IGMPv3, but there is still a fair amount of legacy gear at various edges which doesn't. Regards Marshall Regards, Jeff On May 3, 2012, at 12:34 PM, Nick Hilliard n...@foobar.org wrote: On 03/05/2012 21:00, Greg Shepherd wrote: Sure, but GLOP predated SSM, and was really only an interim fix for the presumed need of mcast address assignments. GLOP only gives you a /24 for each ASN where SSM gives you a /8 for every unique unicast address you have along with vastly superior security and network simplicity. SSM is indeed a lot simpler and better than GLOP in every conceivable way - except vendor support. It needs igmpv3 on all intermediate devices and SSM support on the client device. All major desktop operating systems now have SSM support (OS/X since 10.7/Lion), but there is still lots of older hardware which either doesn't support igmpv3 or else only supports it in a very primitive fashion. This can lead to Unexpected Behaviour in naive roll-outs. Nick
Re: Verizon 1xRTT/EVDO for OOB
We use 1X/EVDO for telemetry polling, but find that the latency is very high with VZW to Verizon wired networks located in east Texas, so if your network is on the west coast, every packet traverses the US continent twice even though the endpoints may be less than 100 miles (or even 1 mile) apart. VZW also tears down the cell tower to cell modem connection every 24 hours, resulting in IP connectivity loss, so this service is no good for high availability applications. ATT Mobility has a similar service, but they keep the connection up all the time allowing the network designer to use their service for high availability applications. ATT's gateways are in the Pacific Northwest, I believe, so the latency problem is the same. On Fri, May 4, 2012 at 7:53 AM, Christopher J. Pilkington c...@0x1.netwrote: Is anyone using Verizon 1xRTT/EVDO (3G) for OOB work? I'm trying to sort out how exactly to order a compatible service from them. Unfortunately I don't manage our Verizon Wireless relationship, so I need to be specific. Is there a service code or name they refer to this service as? Looking for low bandwidth, static IP. -cjp
Re: mulcast assignments
Marshall, That's exactly what the feature does, when it receives a IGMPv1/2 join it adds a preconfigured S and sends S,G (INCLUDE)upstream. Google for IGMP mapping Regards, Jeff On May 4, 2012, at 1:45 PM, Marshall Eubanks marshall.euba...@gmail.com wrote: On Fri, May 4, 2012 at 2:53 AM, Jeff Tantsura jeff.tants...@ericsson.com wrote: Hi, All modern routers support mapping from IGMPv2 to PIM SSM, all static, some others thru DNS, etc I am not sure what you mean here. To support SSM, you need IGMPv3. Most routers do support IGMPv3, but there is still a fair amount of legacy gear at various edges which doesn't. Regards Marshall Regards, Jeff On May 3, 2012, at 12:34 PM, Nick Hilliard n...@foobar.org wrote: On 03/05/2012 21:00, Greg Shepherd wrote: Sure, but GLOP predated SSM, and was really only an interim fix for the presumed need of mcast address assignments. GLOP only gives you a /24 for each ASN where SSM gives you a /8 for every unique unicast address you have along with vastly superior security and network simplicity. SSM is indeed a lot simpler and better than GLOP in every conceivable way - except vendor support. It needs igmpv3 on all intermediate devices and SSM support on the client device. All major desktop operating systems now have SSM support (OS/X since 10.7/Lion), but there is still lots of older hardware which either doesn't support igmpv3 or else only supports it in a very primitive fashion. This can lead to Unexpected Behaviour in naive roll-outs. Nick
Re: Network diagram app that shows realtime link utilizatin
On 5/4/2012 6:53 PM, Jeroen van Aart wrote: Anurag Bhatia wrote: I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for I remember someone here saying that real time monitoring gives you useless results, because if you make the time of measurement small enough the utilisation becomes 100%. Measurement of throughput is how many times this happens during a particular time interval. I hope I remembered right. I think you are referring to this thread - http://www.gossamer-threads.com/lists/nanog/users/149903 and in particular this quote: cjp at 0x1 wrote on Feb 16, 2012, 11:25am As sampling rate approaches zero, so will the spikyness of the graph--ultimately an interface is either sending a frame (*100*%) or it's not (0%). -cjp Utilisation doesn't become 100%, instead measured utilisation will either be 100% or 0% at each interval. -DMM
Re: Network diagram app that shows realtime link utilizatin
In a troubleshooting situation I think real time is valid. Off course, is non-sense doing this for normal monitoring... But firstly define: What's real-time? every second? miliseconds? 10 seconds? 30 seconds? It's subjective nowadays 2012/5/4 David Miller dmil...@tiggee.com On 5/4/2012 6:53 PM, Jeroen van Aart wrote: Anurag Bhatia wrote: I have been using Zenoss quite a bit. It does not shows exact real time stat of interface but close to real time + it has ton more options for I remember someone here saying that real time monitoring gives you useless results, because if you make the time of measurement small enough the utilisation becomes 100%. Measurement of throughput is how many times this happens during a particular time interval. I hope I remembered right. I think you are referring to this thread - http://www.gossamer-threads.com/lists/nanog/users/149903 and in particular this quote: cjp at 0x1 wrote on Feb 16, 2012, 11:25am As sampling rate approaches zero, so will the spikyness of the graph--ultimately an interface is either sending a frame (*100*%) or it's not (0%). -cjp Utilisation doesn't become 100%, instead measured utilisation will either be 100% or 0% at each interval. -DMM -- []'s Lívio Zanol Puppim
