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Do routers prioritize control traffic?
by Christos Papadopoulos 18 Feb '07

18 Feb '07

I know routers today have the ability to prioritize traffic, but last I heard, these controls are not often used for user traffic (let's not discuss net neutrality here). Are they used for control (e.g., routing) traffic? Please say a bit more than "It depends!" :-) Our students are interested in real-world practices. Answers on or off list are welcome. Christos Papadopoulos Colorado State University.

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Re: botnets: web servers, end-systems and Vint Cerf
by J. Oquendo 18 Feb '07

18 Feb '07

michael.dillon(a)bt.com wrote: > > You misunderstand. The problem of securing machines *IS* solved. It is > possible. It is regularly done with servers connected to the Internet. > There is no *COMPUTING* problem or technical problem. > The problem of the 100 million machines is a social or business problem. > We know how they can be secured, but the solution is not being > implemented. > > --Michael Dillon > After all these years, I'm still surprised a consortium of ISP's haven't figured out a way to do something a-la Packet Fence for their clients where - whenever an infected machine is detected after logging in, that machine is thrown into say a VLAN with instructions on how to clean their machines before they're allowed to go further and stay online. If you ask me, traffic providers (NSP's/NAP's) and ISP's don't mind this garbage coming out of their networks, if they did they'd actually ban together and do something about it. Its obvious those charging for traffic will say little. Minimized traffic means minimized revenue. All I see is "No we despise that kind of traffic" along with a shrug and nothing being done about it. I'm sure if some legislative body somewhere started levying fines against providers, the net would be a cleaner place. For comments on 100 million infected machines... Doubtable. Anyone can play fuzzy math games, heck I just strangely figured out that MS is costing me an arm and a leg! http://www.merit.edu/mail.archives/nanog/msg04755.html -- ==================================================== J. Oquendo http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x1383A743 sil . infiltrated @ net http://www.infiltrated.net The happiness of society is the end of government. John Adams

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RPSL question
by Andreas Voellmy 18 Feb '07

18 Feb '07

Hi, I'm trying to learn about BGP and just ran across RPSL. I've seen www.radb.net and know that lots of people are registering their policies here. Are organizations also using these RPSL policies to compile configuration files for their routers (via RtConfig)? Or do they just maintain their RPSL policies and router configurations separately? Thanks, Andreas

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Re: botnets: web servers, end-systems and Vint Cerf
by Fergie 18 Feb '07

18 Feb '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hey, Danny: - -- Danny McPherson <danny(a)tcb.net> wrote: >While I understand your frustration, lest we not forget, providers are in >the business of making money, and solutions of this type today only add >to churn, additional operational expense and liability. It's not quite so >black and white as you make it, unfortunately. Unfortunately, if ISPs don't do _something_ to "clean up their own backyards", I hate to think of what the alternative may be. >With that, as Sean points out, providers are trying to address the issues >in an business-savvy manner and some do seem to have reasonable (IMO) >solutions underway. But be careful what you ask for, some of these >solutions you're mandating might very well resemble SiteFinder-style >schema's (or far worse) in order to justify the investment by the >providers. Indeed. It's a hairy problem, but an important one that needs to be addressed. - - ferg -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.5.3 (Build 5003) wj8DBQFF16eOq1pz9mNUZTMRAhNYAKCSmQieIM8K44H4AnRWcWbXVwax8wCglsF6 BMb6JC95v5IrtIH2x+MYMw0= =T5dQ -----END PGP SIGNATURE----- -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg(at)netzero.net ferg's tech blog: http://fergdawg.blogspot.com/

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RE: Do routers prioritize control traffic?
by michael.dillon＠bt.com 18 Feb '07

18 Feb '07

> I know routers today have the ability to prioritize > traffic, but last I heard, these controls are not > often used for user traffic (let's not discuss > net neutrality here). > > Are they used for control (e.g., routing) traffic? They are used for BUSINESS traffic. Also, since these controls make routers work harder, there is no point in using them where there are no traffic problems. Most providers build their core networks with enough headroom so that there are no traffic problems. That leaves the last mile connection to tinker with, however, the cost problem remains. The only way to solve the cost problem is where a business customer will pay for traffic controls to be implemented on the provider's edge routers. Bottom line is that use of QOS is very common on CPE routers and edge routers of business customers and this is usually part of a total managed network package such as a VPN or Extranet. I have seen QOS implemented for control traffic but that was a scenario where the company allowed business customers access to a tool which would ping through to the CPE router. In order to prevent the customer from DOSing themself with pings, they capped the traffic with CAR or similar. It can be a bad idea to apply QOS to control traffic since it is generally easier and cheaper to add bandwidth. Just because the machine has lots of bright buttons and knobs on the control panel doesn't mean that it is a good idea to play with them all. And the fundamental problem of QOS means that you only use it where you have to. QOS works by delaying or discarding packets. It is hard to sell that as a valuable service to ordinary users. --Michael Dillon

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tracking fiber assets
by Frank Coluccio 17 Feb '07

17 Feb '07

Daniel, Ordinarily, I might suggest a straightforward software-based cable management system. However, since your list of concerns also includes active elements and their wavelength and probably sub- lambda derivatives, you'll probably want something that's rule-based with a bit more smarts. Give a look at the "One Plan" system from VPIsystems Inc (Holmdel, NJ). It was written up recently in Lightwave Magazine: http://tinyurl.com/25q88n One Plan has a photonic-layer inventory and configuration module that will very likely satisfy your needs at the cable, strand and multimplexed levels, and then some. Whether or not it is available as a standalone module, however, I can't rightly say. Good Luck. Frank A. Coluccio DTI Consulting Inc. New York City 347-526-6788 fcoluccio(a)dticonsulting.com ------- On Thu Feb 15 18:52 , Daniel J McDonald sent: > >What do people use to keep track of fiber-optic assets? We own fiber on >electric transmission lines - a hundred spans or so, mostly 24-48 count, >about 800-900 total route-miles. But we lack a tool to keep track of >what is in use, which customers would be affected when we perform >maintenance, and the like. > >Any suggestions for good tools to manage this would be most appreciated. >Our spreadsheets, CAD drawings, and directories full of OTDR shots are >just not cutting it. > > >-- >Daniel J McDonald, CCIE # 2495, CISSP # 78281, CNX >Austin Energy >http://www.austinenergy.com

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RE: botnets: web servers, end-systems and Vint Cerf
by Sean Donelan 17 Feb '07

17 Feb '07

On Fri, 16 Feb 2007, Nicholas J. Shank wrote: >> How is the "acceptable" infection rate for universities different than > the >> infection rate of other types of networks? > > Because other types of networks are expected (expected being the > keyword) to have competent administrators. Expected by whom? How many home networks or even small business networks have competent administrators? What is the infection rate for the network at a typical NANOG meeting full of Internet "experts?" What was the infection rate at the RSA security conference network earlier this month? Although some specific individual networks may have higher or lower infection rates, I haven't see a significant difference in infection rates between types of networks or industries. For universities with low infection rates, there are just as many universities with high infection rates. For government networks with low infection rates, there are just as many government networks with high infection rates. Would taking the practices from the specific individual networks with low infection rates and using them elsewhere change the infection rate of other networks?

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North East fiber cut?
by German Martinez 16 Feb '07

16 Feb '07

Hello, Anyone seeing fiber cut issues around DC area? Thanks German

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Weekly Routing Table Report
by Routing Analysis Role Account 16 Feb '07

16 Feb '07

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For historical data, please see http://thyme.apnic.net. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 04:00 +10GMT Sat 17 Feb, 2007 Analysis Summary ---------------- BGP routing table entries examined: 212075 Prefixes after maximum aggregation: 114136 Deaggregation factor: 1.86 Unique aggregates announced to Internet: 103539 Total ASes present in the Internet Routing Table: 24373 Origin-only ASes present in the Internet Routing Table: 21224 Origin ASes announcing only one prefix: 10245 Transit ASes present in the Internet Routing Table: 3149 Transit-only ASes present in the Internet Routing Table: 76 Average AS path length visible in the Internet Routing Table: 3.6 Max AS path length visible: 32 Max AS path prepend of ASN (20858) 18 Prefixes from unregistered ASNs in the Routing Table: 4 Unregistered ASNs in the Routing Table: 6 Special use prefixes present in the Routing Table: 0 Prefixes being announced from unallocated address space: 13 Number of addresses announced to Internet: 1685198316 Equivalent to 100 /8s, 114 /16s and 21 /24s Percentage of available address space announced: 45.5 Percentage of allocated address space announced: 62.5 Percentage of available address space allocated: 72.8 Total number of prefixes smaller than registry allocations: 109306 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 47744 Total APNIC prefixes after maximum aggregation: 19291 APNIC Deaggregation factor: 2.47 Prefixes being announced from the APNIC address blocks: 45040 Unique aggregates announced from the APNIC address blocks: 20417 APNIC Region origin ASes present in the Internet Routing Table: 2858 APNIC Region origin ASes announcing only one prefix: 785 APNIC Region transit ASes present in the Internet Routing Table: 416 Average APNIC Region AS path length visible: 3.6 Max APNIC Region AS path length visible: 16 Number of APNIC addresses announced to Internet: 290731616 Equivalent to 17 /8s, 84 /16s and 54 /24s Percentage of available APNIC address space announced: 72.0 APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911 APNIC Address Blocks 58/7, 60/7, 116/6, 120/6, 124/7, 126/8, 202/7 210/7, 218/7, 220/7 and 222/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 103906 Total ARIN prefixes after maximum aggregation: 61209 ARIN Deaggregation factor: 1.70 Prefixes being announced from the ARIN address blocks: 75934 Unique aggregates announced from the ARIN address blocks: 29457 ARIN Region origin ASes present in the Internet Routing Table: 11340 ARIN Region origin ASes announcing only one prefix: 4339 ARIN Region transit ASes present in the Internet Routing Table: 1052 Average ARIN Region AS path length visible: 3.4 Max ARIN Region AS path length visible: 21 Number of ARIN addresses announced to Internet: 318291328 Equivalent to 18 /8s, 248 /16s and 189 /24s Percentage of available ARIN address space announced: 70.3 ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106 (pre-ERX allocations) 2138-2584, 2615-2772, 2823-2829, 2880-3153 3354-4607, 4865-5119, 5632-6655, 6912-7466 7723-8191, 10240-12287, 13312-15359, 16384-17407 18432-20479, 21504-23551, 25600-26591, 26624-27647, 29696-30719, 31744-33791 35840-36863, 39936-40959 ARIN Address Blocks 24/8, 63/8, 64/5, 72/6, 76/8, 96/6, 199/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 43881 Total RIPE prefixes after maximum aggregation: 28621 RIPE Deaggregation factor: 1.53 Prefixes being announced from the RIPE address blocks: 40564 Unique aggregates announced from the RIPE address blocks: 26990 RIPE Region origin ASes present in the Internet Routing Table: 9158 RIPE Region origin ASes announcing only one prefix: 4817 RIPE Region transit ASes present in the Internet Routing Table: 1482 Average RIPE Region AS path length visible: 4.0 Max RIPE Region AS path length visible: 32 Number of RIPE addresses announced to Internet: 290939396 Equivalent to 17 /8s, 87 /16s and 98 /24s Percentage of available RIPE address space announced: 78.8 RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614 (pre-ERX allocations) 2773-2822, 2830-2879, 3154-3353, 5377-5631 6656-6911, 8192-9215, 12288-13311, 15360-16383 20480-21503, 24576-25599, 28672-29695 30720-31743, 33792-35839, 38912-39935 40960-43007 RIPE Address Blocks 62/8, 77/8, 78/7, 80/5, 88/6, 193/8, 194/7, 212/7 and 217/8 LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 13979 Total LACNIC prefixes after maximum aggregation: 4050 LACNIC Deaggregation factor: 3.45 Prefixes being announced from the LACNIC address blocks: 12090 Unique aggregates announced from the LACNIC address blocks: 7007 LACNIC Region origin ASes present in the Internet Routing Table: 762 LACNIC Region origin ASes announcing only one prefix: 248 LACNIC Region transit ASes present in the Internet Routing Table: 134 Average LACNIC Region AS path length visible: 4.1 Max LACNIC Region AS path length visible: 20 Number of LACNIC addresses announced to Internet: 37684736 Equivalent to 2 /8s, 63 /16s and 6 /24s Percentage of available LACNIC address space announced: 56.2 LACNIC AS Blocks 26592-26623, 27648-28671, plus ERX transfers LACNIC Address Blocks 189/8, 190/8, 200/7 AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 2562 Total AfriNIC prefixes after maximum aggregation: 963 AfriNIC Deaggregation factor: 2.66 Prefixes being announced from the AfriNIC address blocks: 1873 Unique aggregates announced from the AfriNIC address blocks: 1174 AfriNIC Region origin ASes present in the Internet Routing Table: 178 AfriNIC Region origin ASes announcing only one prefix: 55 AfriNIC Region transit ASes present in the Internet Routing Table: 37 Average AfriNIC Region AS path length visible: 3.6 Max AfriNIC Region AS path length visible: 15 Number of AfriNIC addresses announced to Internet: 5408000 Equivalent to 0 /8s, 82 /16s and 133 /24s Percentage of available AfriNIC address space announced: 16.1 AfriNIC AS Blocks 36864-37887 & ERX transfers AfriNIC Address Blocks 41/8, 196/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 4134 1275 8718 277 CHINANET-BACKBONE 4755 1114 383 77 Videsh Sanchar Nigam Ltd. Aut 9583 1062 77 373 Sify Limited 9498 953 467 66 BHARTI BT INTERNET LTD. 23577 779 35 707 Korea Telecom (ATM-MPLS) 4766 766 4944 310 Korea Telecom (KIX) 17488 598 39 24 Hathway IP Over Cable Interne 7545 585 142 75 TPG Internet Pty Ltd 1221 579 1686 441 Telstra Pty Ltd 18101 522 103 23 Reliance Infocom Ltd Internet 17676 502 10935 65 Softbank BB Corp. 4812 498 763 72 China Telecom (Shanghai) 9443 443 111 75 Primus Telecommunications 7474 380 215 257 SingTel Optus Pty Ltd 17849 370 35 94 Telecommunications Technology 4802 359 86 149 Wantree Development 17557 353 34 169 Pakistan Telecom 17974 337 129 14 PT TELEKOMUNIKASI INDONESIA 2907 336 1749 309 SINET Japan 4837 336 4151 148 chinanet IDC center beijing n ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 7018 1509 6126 994 AT&T WorldNet Services 4323 1294 885 505 Time Warner Telecom 6478 1131 454 195 AT&T Worldnet Services 2386 1107 570 732 AT&T Data Communications Serv 6197 1016 651 498 BellSouth Network Solutions, 18566 990 288 9 Covad Communications 11492 960 100 18 Cable One 701 941 6696 748 UUNET Technologies, Inc. 174 936 6791 864 Cogent Communications 1239 818 2729 574 Sprint 20115 806 707 416 Charter Communications 7011 786 227 475 Citizens Utilities 19262 755 2591 178 Verizon Global Networks 22773 728 1872 41 Cox Communications, Inc. 209 712 3742 563 Qwest 721 640 21771 273 DLA Systems Automation Center 852 604 1090 391 Telus Advanced Communications 5668 575 160 16 CenturyTel Internet Holdings, 19916 568 49 54 OLM LLC 855 566 250 70 Canadian Research Network RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 546 1895 424 UUNET - Commercial IP service 24863 325 45 25 LINKdotNET AS number 3301 315 1199 290 TeliaNet Sweden 3320 298 4993 249 Deutsche Telekom AG 8220 270 471 261 COLT Telecommunications 6746 267 95 246 Dynamic Network Technologies, 680 257 2044 251 DFN-IP service G-WiN 8708 241 284 227 Romania Data Systems S.A. 3215 238 2224 92 France Telecom Transpac 1257 223 1116 172 SWIPnet Swedish IP Network 5416 215 14 15 BATELCO-BH 3269 213 2423 71 TELECOM ITALIA 3246 208 355 198 Song Networks 30890 206 17 96 SC Kappa Invexim SRL 8551 203 196 28 Bezeq International 3352 199 1783 33 Ibernet, Internet Access Netw 20858 197 34 3 EgyNet 3300 182 171 90 AUCS Communications Services 12479 177 578 6 Uni2 Autonomous System 786 172 1779 172 The JANET IP Service LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 1020 2095 212 UniNet S.A. de C.V. 11830 482 299 19 Instituto Costarricense de El 11172 347 108 84 Servicios Alestra S.A de C.V 16814 329 20 8 NSS, S.A. 22047 307 206 11 VTR PUNTO NET S.A. 6471 253 74 30 ENTEL CHILE S.A. 7303 249 142 30 Telecom Argentina Stet-France 14117 239 16 13 Telefonica del Sur S.A. 11556 237 128 4 Cable-Wireless Panama 6147 229 182 20 Telefonica Del Peru 6503 204 173 86 AVANTEL, S.A. 10481 181 72 8 Prima S.A. 21826 156 27 56 INTERCABLE 7910 152 11 32 ANDINET ON LINE 23216 147 19 42 RAMtelecom Telecomunicaciones 18822 145 9 10 TELEFONICA MANQUEHUE 19169 143 9 25 Telconet 19429 143 88 35 E.T.B. 20299 141 18 21 NEWCOM AMERICAS 10620 133 41 14 TVCABLE BOGOTA AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 3741 290 868 232 The Internet Solution 8452 244 60 6 TEDATA 15475 155 84 4 Nile Online 6713 144 135 11 Itissalat Al-MAGHRIB 2018 138 309 113 Tertiary Education Network 5536 123 8 15 Internet Egypt Network 33783 111 6 5 EEPAD TISP TELECOM & INTERNET 2905 79 173 72 The Internetworking Company o 24835 77 48 6 RAYA Telecom - Egypt 2561 64 6 2 Egyptian Universities Network 15706 55 12 4 Sudatel Internet Exchange Aut 23889 53 16 13 MAURITIUS TELECOM 5713 44 294 34 Telkom SA Ltd 33774 42 12 22 AS Number for Telecom Algeria 16637 33 21 25 Johnnic e-Ventures 33766 33 2 1 Nyala Communications Pty Ltd 8524 30 2 6 AUCEGYPT Autonomous System 33776 27 2 5 Starcomms Nigeria Limited 12455 26 6 3 Jambonet Autonomous system 21280 26 4 4 Swift Global Kenya Ltd.Is an Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4755 1114 1037 Videsh Sanchar Nigam Ltd. Aut 4134 1275 998 CHINANET-BACKBONE 18566 990 981 Covad Communications 11492 960 942 Cable One 6478 1131 936 AT&T Worldnet Services 9498 953 887 BHARTI BT INTERNET LTD. 8151 1020 808 UniNet S.A. de C.V. 4323 1294 789 Time Warner Telecom 9583 1062 689 Sify Limited 22773 728 687 Cox Communications, Inc. 19262 755 577 Verizon Global Networks 17488 598 574 Hathway IP Over Cable Interne 5668 575 559 CenturyTel Internet Holdings, 6197 1016 518 BellSouth Network Solutions, 19916 568 514 OLM LLC 7545 585 510 TPG Internet Pty Ltd 18101 522 499 Reliance Infocom Ltd Internet 855 566 496 Canadian Research Network 15270 507 473 PaeTec.net -a division of Pae 11830 482 463 Instituto Costarricense de El List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Network Transit AS Description 65332 PRIVATE 63.166.106.192/27 1803 SPRINT 24410 UNALLOCATED 203.119.28.0/24 4134 CHINANET-BACKBONE 24409 UNALLOCATED 203.119.29.0/24 9808 Guangdong Mobile Com 22895 UNALLOCATED 216.174.38.0/24 19094 Adelphia Business So Advertised Unallocated Addresses -------------------------------- Network Origin AS Description 7.1.1.0/24 1239 Sprint 42.205.192.0/20 36925 Meditelecom 132.0.0.0/10 721 DLA Systems Automation Center 137.0.0.0/13 721 DLA Systems Automation Center 158.0.0.0/13 721 DLA Systems Automation Center 172.33.1.0/24 7018 AT&T WorldNet Services 180.190.0.0/16 24003 JUBILANT ORGANOSYS LTD., INDI 192.0.10.0/24 9498 BHARTI BT INTERNET LTD. 192.44.0.0/24 5501 Fraunhofer Gesellschaft 192.44.0.0/19 702 UUNET - Commercial IP service 192.70.164.0/24 25689 National Research Council of 192.153.136.0/21 721 DLA Systems Automation Center 192.172.0.0/19 721 DLA Systems Automation Center Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:20 /9:9 /10:12 /11:33 /12:117 /13:226 /14:425 /15:823 /16:9229 /17:3727 /18:6101 /19:13142 /20:14859 /21:13393 /22:17177 /23:18329 /24:112623 /25:677 /26:487 /27:416 /28:68 /29:44 /30:105 /31:0 /32:33 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 6478 1076 1131 AT&T Worldnet Services 18566 972 990 Covad Communications 11492 946 960 Cable One 9583 898 1062 Sify Limited 2386 831 1107 AT&T Data Communications Serv 7018 810 1509 AT&T WorldNet Services 6197 795 1016 BellSouth Network Solutions, 23577 765 779 Korea Telecom (ATM-MPLS) 7011 685 786 Citizens Utilities 9498 607 953 BHARTI BT INTERNET LTD. 4766 573 766 Korea Telecom (KIX) 19916 563 568 OLM LLC 4323 535 1294 Time Warner Telecom 4755 523 1114 Videsh Sanchar Nigam Ltd. Aut 15270 475 507 PaeTec.net -a division of Pae 855 465 566 Canadian Research Network 18101 453 522 Reliance Infocom Ltd Internet 5668 445 575 CenturyTel Internet Holdings, 17488 420 598 Hathway IP Over Cable Interne 33588 410 432 Bresnan Communications, LLC. Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:9 7:1 8:62 9:1 12:1795 13:1 15:16 16:3 17:3 18:5 20:36 24:890 25:1 32:53 38:280 40:57 41:88 44:2 47:7 52:4 55:1 56:3 57:25 58:306 59:388 60:211 61:941 62:1024 63:1911 64:3204 65:2313 66:3119 67:721 68:649 69:1722 70:448 71:98 72:1214 73:1 74:166 75:79 76:1 77:23 80:842 81:775 82:654 83:366 84:509 85:722 86:475 87:482 88:239 89:803 90:3 91:168 97:1 116:1 117:1 118:1 119:1 120:1 121:137 122:138 123:38 124:569 125:792 128:307 129:219 130:130 131:341 132:49 133:9 134:186 135:42 136:181 137:112 138:195 139:52 140:504 141:141 142:367 143:215 144:269 145:43 146:315 147:146 148:375 149:189 150:114 151:116 152:94 153:119 154:5 155:249 156:129 157:162 158:168 159:149 160:98 161:87 162:228 163:163 164:450 165:331 166:246 167:282 168:502 169:120 170:389 171:15 172:1 189:165 190:415 192:5747 193:3721 194:2963 195:2208 196:951 198:3746 199:3281 200:4627 201:980 202:7199 203:7349 204:3952 205:2054 206:2391 207:2837 208:2443 209:3588 210:2382 211:927 212:1298 213:1426 214:382 215:39 216:4078 217:1163 218:348 219:273 220:856 221:373 222:257 End of report Report Website: http://thyme.apnic.net

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Re: wifi for 600, alex
by Todd Vierling 16 Feb '07

16 Feb '07

On 2/15/07, Pickett, McLean (OCTO) <mclean.pickett(a)dc.gov> wrote: > Works well if everyone has 802.11a/g card. That's been my biggest concern > with deploying 802.11a recently. > > -----Original Message----- > The oft-overlooked 802.11a is great for this purpose when there isn't > enough wiring infrastructure to drop a RJ45 in all the necessary > conference rooms. I was mainly referring to the conference infra network, used for presentations and such. Rather than a scattered AP layout, a semi-point-to-point system targeted only to the critical resources works well with 11a. If you keep attendees tethered to 2.4GHz, you probably only need to alternate between at most two 5.xGHz channels to cover the necessary endpoints, and can locate the APs in a less dense pattern. As for whether presenters have 11a cards, there's the alternate possibility of running another 11a AP in AP-client mode (inside the conference hall) in a wired-to-wireless-to-wired sort of setup. This could also work for a terminal room setup. Of course, a lot of the convenience of frequency segregation will go out the window in a few years when the final 11n document exists, as it now looks like 11n will be earmarked for use in all three bands (2.4GHz and both 5GHz ranges). I'll just hope that my residential neighbors stay out of my 5GHz space a little while longer. 8-) -- -- Todd Vierling <tv(a)duh.org> <tv(a)pobox.com> <todd(a)vierling.name>

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