February 2026 - NANOG - lists.nanog.org

Hey Google - Recaptcha sucks
by William Herrin 07 Feb '26

07 Feb '26

I'm at SEATAC airport trying to access www.google.com via the public wifi with Firefox. Apparently you really don't like that because it's stuck in a Recaptcha loop displaying captcha after captcha after captcha. I can't help but notice that Chrome works. It's your _competitor_ Firefox that you don't seem to like. IP address: 198.134.98.50 Time: 2026-02-05T20:03:35Z URL: https://www.google.com/ FIx it, eh? Regards, Bill Herrin

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AS49666 certain nets out of global table
by Marco Moock 07 Feb '26

07 Feb '26

Hello! Today I noticed various connection attempts from 2001:4188:2::/48 on my TOR relay, but all replies got back a route unreachable. When checking https://bgp.tools/prefix/2001:4188:2:600:10:10:34:36 I noticed that this net was not in the table since start of January. Certain (but not all) of their IPv4 nets are also not propagated anymore to the public bgp looking glasses. Is that part of the Iran internet shutdown or is that a non-political issue? Sadly, their peers don't have RIPE probes with IPv6, so no way to test there. -- kind regards Marco Send unsolicited bulk mail to 1770474123muell(a)stinkedores.dorfdsl.de

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Weekly Global IPv4 Routing Table Report
by Routing Table Analysis Role Account 06 Feb '26

06 Feb '26

This is an automated weekly mailing describing the state of the Global IPv4 Routing Table as seen from APNIC's router in Japan. The posting is sent to APOPS, NANOG, AfNOG, SANOG, PacNOG, SAFNOG UKNOF, TZNOG, MENOG, BJNOG, SDNOG, CMNOG, LACNOG and the RIPE Routing WG. Daily listings are sent to bgp-stats(a)lists.apnic.net. For historical data, please see https://thyme.apnic.net. If you have any comments please contact Philip Smith <pfsinoz(a)gmail.com>. IPv4 Routing Table Report 04:00 +10GMT Sat 07 Feb, 2026 IPv4 BGP Table (Global) as seen at Japan. Report Website: https://thyme.apnic.net Detailed Analysis: https://thyme.apnic.net/current/ Analysis Summary ---------------- BGP routing table entries examined: 1031577 Prefixes after maximum aggregation (per Origin AS): 396659 Deaggregation factor: 2.60 Unique aggregates announced (without unneeded subnets): 508259 Number of IPv4 prefixes with a valid ROA: 611592 Number of IPv4 prefixes with an invalid ROA: 1422 Number of IPv4 prefixes with no ROA: 418563 Total ASes present in the Internet Routing Table: 77862 Prefixes per ASN: 13.25 Origin-only ASes present in the Internet Routing Table: 66894 Origin ASes announcing only one prefix: 27183 Transit ASes present in the Internet Routing Table: 10968 Transit-only ASes present in the Internet Routing Table: 551 Average AS path length visible in the Internet Routing Table: 4.7 Max AS path length visible: 209 Max AS path prepend of ASN (214570) 200 Prefixes from unregistered ASNs in the Routing Table: 1059 Number of instances of unregistered ASNs: 1098 Number of 32-bit ASNs allocated by the RIRs: 48643 Number of 32-bit ASNs visible in the Routing Table: 39783 Prefixes from 32-bit ASNs in the Routing Table: 222059 Number of bogon 32-bit ASNs visible in the Routing Table: 117 Special use prefixes present in the Routing Table: 1 Prefixes being announced from unallocated address space: 446 Number of addresses announced to Internet: 3103963520 Equivalent to 185 /8s, 2 /16s and 185 /24s Percentage of available address space announced: 83.8 Percentage of allocated address space announced: 83.8 Percentage of available address space allocated: 100.0 Percentage of address space in use by end-sites: 99.6 Total number of prefixes smaller than registry allocations: 336281 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 280718 Total APNIC prefixes after maximum aggregation: 82449 APNIC Deaggregation factor: 3.40 Prefixes being announced from the APNIC address blocks: 267364 Unique aggregates announced from the APNIC address blocks: 107063 APNIC Region origin ASes present in the Internet Routing Table: 15043 APNIC Prefixes per ASN: 17.77 APNIC Region origin ASes announcing only one prefix: 4596 APNIC Region transit ASes present in the Internet Routing Table: 1986 Average APNIC Region AS path length visible: 4.8 Max APNIC Region AS path length visible: 35 Number of APNIC region 32-bit ASNs visible in the Routing Table: 10589 Number of APNIC addresses announced to Internet: 753007360 Equivalent to 44 /8s, 225 /16s and 251 /24s APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431 (pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319, 58368-59391, 63488-64098, 64297-64395, 131072-155961 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, 150/8, 153/8, 163/8, 171/8, 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: 303121 Total ARIN prefixes after maximum aggregation: 136028 ARIN Deaggregation factor: 2.23 Prefixes being announced from the ARIN address blocks: 302578 Unique aggregates announced from the ARIN address blocks: 146354 ARIN Region origin ASes present in the Internet Routing Table: 19392 ARIN Prefixes per ASN: 15.60 ARIN Region origin ASes announcing only one prefix: 7077 ARIN Region transit ASes present in the Internet Routing Table: 1923 Average ARIN Region AS path length visible: 4.3 Max ARIN Region AS path length visible: 20 Number of ARIN region 32-bit ASNs visible in the Routing Table: 5457 Number of ARIN addresses announced to Internet: 1342715136 Equivalent to 80 /8s, 8 /16s and 53 /24s 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, 46080-47103 53248-55295, 62464-63487, 64198-64296, 393216-402332 ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8, 12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8, 20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8, 29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8, 40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8, 54/8, 55/8, 56/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8, 69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8, 76/8, 96/8, 97/8, 98/8, 99/8, 100/8, 104/8, 107/8, 108/8, 128/8, 129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8, 137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8, 146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8, 157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8, 165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8, 173/8, 174/8, 184/8, 192/8, 198/8, 199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8, 214/8, 215/8, 216/8, RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 283581 Total RIPE prefixes after maximum aggregation: 140272 RIPE Deaggregation factor: 2.02 Prefixes being announced from the RIPE address blocks: 285867 Unique aggregates announced from the RIPE address blocks: 185545 RIPE Region origin ASes present in the Internet Routing Table: 29178 RIPE Prefixes per ASN: 9.80 RIPE Region origin ASes announcing only one prefix: 12097 RIPE Region transit ASes present in the Internet Routing Table: 3972 Average RIPE Region AS path length visible: 4.8 Max RIPE Region AS path length visible: 209 Number of RIPE region 32-bit ASNs visible in the Routing Table: 12998 Number of RIPE addresses announced to Internet: 733706112 Equivalent to 43 /8s, 187 /16s and 119 /24s 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 40960-45055, 47104-52223, 56320-58367 59392-61439, 61952-62463, 64396-64495 196608-216475 RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8, 53/8, 57/8, 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8, 83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8, 90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 109/8, 141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8, 193/8, 194/8, 195/8, 212/8, 213/8, 217/8, LACNIC Region Analysis Summary ------------------------------ Prefixes being announced by LACNIC Region ASes: 126506 Total LACNIC prefixes after maximum aggregation: 30293 LACNIC Deaggregation factor: 4.18 Prefixes being announced from the LACNIC address blocks: 122349 Unique aggregates announced from the LACNIC address blocks: 49546 LACNIC Region origin ASes present in the Internet Routing Table: 11353 LACNIC Prefixes per ASN: 10.78 LACNIC Region origin ASes announcing only one prefix: 2675 LACNIC Region transit ASes present in the Internet Routing Table: 2533 Average LACNIC Region AS path length visible: 5.4 Max LACNIC Region AS path length visible: 69 Number of LACNIC region 32-bit ASNs visible in the Routing Table: 9358 Number of LACNIC addresses announced to Internet: 170917376 Equivalent to 10 /8s, 47 /16s and 254 /24s LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247, 61440-61951, 64099-64197, 262144-275868 + ERX transfers LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8, 191/8, 200/8, 201/8, AfriNIC Region Analysis Summary ------------------------------- Prefixes being announced by AfriNIC Region ASes: 36592 Total AfriNIC prefixes after maximum aggregation: 6929 AfriNIC Deaggregation factor: 5.28 Prefixes being announced from the AfriNIC address blocks: 52973 Unique aggregates announced from the AfriNIC address blocks: 19380 AfriNIC Region origin ASes present in the Internet Routing Table: 2016 AfriNIC Prefixes per ASN: 26.28 AfriNIC Region origin ASes announcing only one prefix: 738 AfriNIC Region transit ASes present in the Internet Routing Table: 394 Average AfriNIC Region AS path length visible: 5.3 Max AfriNIC Region AS path length visible: 53 Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 1381 Number of AfriNIC addresses announced to Internet: 103350016 Equivalent to 6 /8s, 40 /16s and 255 /24s AfriNIC AS Blocks 36864-37887, 327680-329727 & ERX transfers AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8, APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 9808 13773 8945 105 CHINAMOBILE-CN China Mobile Communication 7545 6005 831 555 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5022 4193 77 ERX-CERNET-BKB China Education and Resear 9498 4766 545 337 BBIL-AP BHARTI Airtel Ltd., IN 7552 4060 1332 29 VIETEL-AS-AP Viettel Group, VN 7713 3698 1044 68 TELKOMNET-AS-AP PT Telekomunikasi Indones 56046 3425 831 184 CMNET-JIANGSU-AP China Mobile communicati 45899 3333 1868 98 VNPT-AS-VN VNPT Corp, VN 24560 2972 865 498 AIRTELBROADBAND-AS-AP Bharti Airtel Ltd., 17561 2732 171 532 LCS-AS-AP LARUS Limited, HK Complete listing at https://thyme.apnic.net/current/data-ASnet-APNIC ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14136 38821 5521 AMAZON-02 - Amazon.com, Inc., US 22773 4777 3114 364 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 11492 4636 308 1023 CABLEONE - CABLE ONE, INC., US 7155 3861 286 85 VIASAT-SP-BACKBONE - ViaSat,Inc., US 174 3747 8769 861 COGENT-174 - Cogent Communications, LLC, 6327 3699 1321 71 SHAW - Shaw Communications, CA 396982 3308 4856 485 GOOGLE-CLOUD-PLATFORM - Google LLC, US 749 3142 54728 2393 DNIC-AS-00749 - United States Department 16625 2790 1198 2121 AKAMAI-AS - Akamai Technologies, Inc., US 36352 2696 221 889 AS-COLOCROSSING - HostPapa, US Complete listing at https://thyme.apnic.net/current/data-ASnet-ARIN RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 12479 7240 1711 149 UNI2-AS, ES 39891 4969 306 72 ALJAWWALSTC-AS, SA 9009 3897 365 2228 M247, RO 20940 3823 3393 110 AKAMAI-ASN1, NL 12389 3173 2318 869 ROSTELECOM-AS PJSC Rostelecom. Technical 212238 2572 184 1871 CDNEXT, GB 34984 2434 366 578 TELLCOM-AS, TR 8452 1720 1852 14 TE-AS TE-AS, EG 13188 1607 100 27 TRIOLAN, UA 203020 1587 241 768 HOSTROYALE, IN Complete listing at https://thyme.apnic.net/current/data-ASnet-RIPE LACNIC Region per AS prefix count summary ----------------------------------------- ASN No of nets /20 equiv MaxAgg Description 8151 12716 3286 607 UNINET, MX 10620 3444 457 1106 Telmex Colombia S.A., CO 13999 2478 506 350 Mega Cable, S.A. de C.V., MX 11830 1990 369 65 Instituto Costarricense de Electricidad y 11664 1414 278 33 Techtel LMDS Comunicaciones Interactivas 28573 1375 2430 272 Claro NXT Telecomunicacoes Ltda, BR 3816 1342 770 213 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC, 6147 1257 371 22 INTEGRATEL PERU S.A.A., PE 22884 1055 67 358 TOTAL PLAY TELECOMUNICACIONES SA DE CV, M 26615 1020 2486 57 TIM SA, BR Complete listing at https://thyme.apnic.net/current/data-ASnet-LACNIC AfriNIC Region per AS prefix count summary ------------------------------------------ ASN No of nets /20 equiv MaxAgg Description 24835 1983 646 33 RAYA-AS, EG 36992 1844 1532 338 ETISALAT-MISR, EG 24863 1283 389 16 LINKdotNET-AS, EG 36903 1232 555 98 MT-MPLS, MA 36935 1164 521 44 Vodafone-, EG 37069 1117 1112 11 MOBINIL, EG 29571 1070 78 20 ORANGE-COTE-IVOIRE, CI 328608 606 49 172 Africa-on-Cloud-AS, ZA 20011 580 154 212 NTT-DATA-Inc, ZA 36914 564 82 3 KENET-AS, KE Complete listing at https://thyme.apnic.net/current/data-ASnet-AFRINIC Global Per AS prefix count summary ---------------------------------- ASN No of nets /20 equiv MaxAgg Description 16509 14136 38821 5521 AMAZON-02 - Amazon.com, Inc., US 9808 13773 8945 105 CHINAMOBILE-CN China Mobile Communication 8151 12716 3286 607 UNINET, MX 12479 7240 1711 149 UNI2-AS, ES 7545 6005 831 555 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5022 4193 77 ERX-CERNET-BKB China Education and Resear 39891 4969 306 72 ALJAWWALSTC-AS, SA 22773 4777 3114 364 ASN-CXA-ALL-CCI-22773-RDC - Cox Communica 9498 4766 545 337 BBIL-AP BHARTI Airtel Ltd., IN 11492 4636 308 1023 CABLEONE - CABLE ONE, INC., US Complete listing at https://thyme.apnic.net/current/data-ASnet Global Per AS Maximum Aggregation summary ----------------------------------------- ASN No of nets Net Savings Description 9808 13773 13668 CHINAMOBILE-CN China Mobile Communications Grou 8151 12716 12109 UNINET, MX 12479 7240 7091 UNI2-AS, ES 7545 6005 5450 TPG-INTERNET-AP TPG Telecom Limited, AU 4538 5022 4945 ERX-CERNET-BKB China Education and Research Net 39891 4969 4897 ALJAWWALSTC-AS, SA 9498 4766 4429 BBIL-AP BHARTI Airtel Ltd., IN 22773 4777 4413 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications 7552 4060 4031 VIETEL-AS-AP Viettel Group, VN 7155 3861 3776 VIASAT-SP-BACKBONE - ViaSat,Inc., US Complete listing at https://thyme.apnic.net/current/data-CIDRnet List of Unregistered Origin ASNs (Global) ----------------------------------------- Bad AS Designation Net Originated Transit AS Transit AS Name 393266 UNALLOCATED 8.23.52.0/24 46887 CROWNCASTLE-AS46887 - C 396894 UNALLOCATED 8.28.201.0/24 3356 LEVEL3 - Level 3 Parent 394936 UNALLOCATED 8.33.224.0/24 22442 HOU-PHONOSCOPE - Phonos 395195 UNALLOCATED 8.38.115.0/24 3356 LEVEL3 - Level 3 Parent 1782 UNALLOCATED 8.42.19.0/24 3356 LEVEL3 - Level 3 Parent 13342 UNALLOCATED 12.17.5.0/24 174 COGENT-174 - Cogent Com 26345 UNALLOCATED 12.21.93.0/24 40264 TWC-40264-WI-MN-UPPERMI 396831 UNALLOCATED 12.23.198.0/24 7018 ATT-INTERNET4 - AT&T En 395476 UNALLOCATED 12.36.194.0/24 7018 ATT-INTERNET4 - AT&T En 395476 UNALLOCATED 12.36.195.0/24 3356 LEVEL3 - Level 3 Parent Complete listing at https://thyme.apnic.net/current/data-badAS Prefixes from the Special Purpose Address Registry (Global) ----------------------------------------------------------- Prefix Origin AS Description 192.88.99.0/24 6939 HURRICANE - Hurricane Electric LLC, US Complete listing at https://thyme.apnic.net/current/data-spar Advertised Unallocated Addresses -------------------------------- Unassigned Network ASN Information AS Name 23.137.48.0/24 Origin: 16904 ARVIG-16904 - Arvig Enterprises Inc., US 23.137.48.0/24 Transit: 3257 GTT-BACKBONE GTT, US 23.137.200.0/24 Origin: 16276 OVH, FR 23.137.200.0/24 Transit: 2516 KDDI KDDI CORPORATION, JP 23.140.216.0/24 Origin: 27176 DATAWAGON - DataWagon LLC, US 23.140.216.0/24 Transit: 20278 NEXEON - Nexeon Technologies, Inc., US 23.141.0.0/24 Origin: 395350 RESERVED, ZZ 23.141.0.0/24 Transit: 11426 TWC-11426-CAROLINAS - Charter Communicat 23.142.24.0/24 Origin: 62164 HEYMMAN-2, CA 23.142.24.0/24 Transit: 64236 UNREAL-SERVERS - UnReal Servers, LLC, US Complete listing at https://thyme.apnic.net/current/data-add-IANA Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:16 /9:14 /10:40 /11:92 /12:302 /13:580 /14:1196 /15:2088 /16:13698 /17:8339 /18:13607 /19:25108 /20:46043 /21:52764 /22:113853 /23:106493 /24:646658 /25:686 /26:0 /27:0 /28:0 /29:0 /30:0 /31:0 /32:0 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 8151 6884 12716 UNINET, MX 12479 6168 7240 UNI2-AS, ES 39891 3655 4969 ALJAWWALSTC-AS, SA 11492 3496 4636 CABLEONE - CABLE ONE, INC., US 6327 3479 3699 SHAW - Shaw Communications, CA 22773 3050 4777 ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc., US 7155 2820 3861 VIASAT-SP-BACKBONE - ViaSat,Inc., US 16509 2522 14136 AMAZON-02 - Amazon.com, Inc., US 30036 2311 2656 MEDIACOM-ENTERPRISE-BUSINESS - Mediacom Communications Corp, US 10620 2224 3444 Telmex Colombia S.A., CO Complete listing at https://thyme.apnic.net/current/data-sXXas-nos Number of /24s announced per /8 block (Global) ---------------------------------------------- 1:1827 2:1532 3:983 4:9 5:5051 6:187 7:6 8:1530 9:22 11:172 12:1228 13:618 14:2680 15:420 16:182 17:395 18:919 20:597 21:4 22:188 23:8150 24:2626 25:2 27:2754 29:19 31:3437 32:32 34:81 35:293 36:4633 37:4487 38:10430 39:1265 40:436 41:4573 42:892 43:2938 44:418 45:19731 46:4933 47:404 48:38 49:2197 50:2064 51:599 52:1258 54:241 55:1113 56:11 57:317 58:2226 59:1432 60:1174 61:3115 62:3113 63:1771 64:6205 65:2121 66:6034 67:3255 68:1489 69:4191 70:1052 71:614 72:3082 74:2975 75:1509 76:587 77:2759 78:1927 79:1801 80:2339 81:2183 82:4027 83:1464 84:2043 85:3791 86:1107 87:2396 88:1347 89:4671 90:819 91:8400 92:2853 93:3000 94:4306 95:4567 96:1448 97:314 98:947 99:782 100:69 101:1342 102:4423 103:32284 104:5474 105:788 106:920 107:2845 108:1233 109:4192 110:2306 111:4156 112:3150 113:1695 114:2177 115:2179 116:2173 117:3420 118:2407 119:2101 120:2701 121:1575 122:2965 123:2330 124:1694 125:2992 126:125 128:1669 129:947 130:1592 131:2347 132:779 133:461 134:1633 135:558 136:1633 137:1404 138:2999 139:1612 140:1841 141:1570 142:2469 143:2198 144:1658 145:625 146:2205 147:2271 148:2784 149:2983 150:1320 151:2696 152:2286 153:917 154:9460 155:2302 156:4534 157:2235 158:1508 159:2769 160:3710 161:1975 162:4047 163:2344 164:2021 165:2636 166:1291 167:2234 168:3975 169:913 170:5498 171:1115 172:4570 173:3435 174:893 175:1340 176:3793 177:4760 178:4396 179:2295 180:2956 181:4407 182:3931 183:2609 184:1994 185:21694 186:5564 187:4893 188:4549 189:4488 190:9750 191:1530 192:11507 193:9512 194:7820 195:5671 196:3259 197:3232 198:6258 199:6118 200:8203 201:6406 202:10795 203:10547 204:4747 205:3787 206:4466 207:3977 208:4366 209:5464 210:4999 211:2785 212:4987 213:4061 214:1068 215:54 216:7118 217:3481 218:1734 219:594 220:2195 221:1314 222:1073 223:3315 End of report

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DSCP-45 - from Zayo, Hurricane Electric, Lumen
by Livingood, Jason 06 Feb '26

06 Feb '26

In support of IETF L4S and NQB dual queue low latency standards, Comcast (and other networks) have been actively deploying this technology. L4S uses ECN marks and, since ECN is rarely modified in packet headers, this generally works find across domain boundaries. The more challenging one is NQB, since this is predicated on the DSCP-45 mark crossing domain boundaries - and as I think we all know, network domains all implement DSCP differently and so tend to remark DSCP on ingress. Thus, to support NQB, a network will allow DSCP-45 at ingress and classify the traffic as best effort (like default internet traffic). Comcast has done so and we have >10M homes with dual queue (aka Low Latency DOCSIS, a DOCSIS implementation of L4S and NQB). The volume of DSCP-45 traffic is beginning to grow, so we have started to look at traffic sources as we quantify improvements in application quality of experience (e.g., lower loaded latency and lower jitter). Apart from the expected sources we have observed double digit Mbps (far <1% of DSCP-45 volume) - from Zayo, Hurricane Electric, and Lumen. If you run one of those networks, you may want to look at the source of DSCP-45 traffic to ensure your DSCP policies are squared away. Feel free to ping me for more information if you have any questions. Thanks Jason For more info: 1. TSV NQB draft is in the publishing queue (https://datatracker.ietf.org/doc/draft-ietf-tsvwg-nqb/) 2. In support of this, IANA have entered DSCP code point 45 into their registry (https://www.iana.org/assignments/dscp-registry/dscp-registry.xhtml)

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Anyone from Cloudflare
by John Sweeting 05 Feb '26

05 Feb '26

Hi If there is anyone from Cloudflare reading this please reach out to me asap. It’s important we reach someone there. Thanks, John S. Sent from my iPhone

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