> Mark Andrews writes: > > Cable companies need this amount of address space for > > controlling the CPE boxes. The customers still get public > > addresses. That's a minimum of two addresses per customer. > > One of which can easily be an IPv6 address, so allocating 240/x for this > would seem to cater to those people who can and will modify their > devices to accept 240/4, but cannot or will not give them IPv6 ability. That assumes that they won't work with those addresses today. My FreeBSD boxes will happily talk to each other using class E addresses. No everything has had a lobotomy. Mark bsdi# ifconfig tx0 inet 255.255.254.2 netmask 0xffffff00 alias drugs# ifconfig bge0 inet 255.255.254.1 netmask 0xffffff00 alias drugs# tcpdump host 255.255.254.1 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on bge0, link-type EN10MB (Ethernet), capture size 96 bytes 09:40:00.364407 IP 255.255.254.2.1565 > 255.255.254.1.ssh: S 3539319153:3539319153(0) win 57344 <mss 1460,nop,wscale 0,nop,nop,timestamp 11948618 0> 09:40:00.364886 IP 255.255.254.1.ssh > 255.255.254.2.1565: S 2293183390:2293183390(0) ack 3539319154 win 65535 <mss 1460,nop,wscale 1,nop,nop,timestamp 491719822 11948618> 09:40:00.365495 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 1 win 57920 <nop,nop,timestamp 11948618 491719822> 09:40:00.504633 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 1:40(39) ack 1 win 33304 <nop,nop,timestamp 491719961 11948618> 09:40:00.505719 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 1:40(39) ack 40 win 57920 <nop,nop,timestamp 11948632 491719961> 09:40:00.518965 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 40:776(736) ack 40 win 33304 <nop,nop,timestamp 491719976 11948632> 09:40:00.520554 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 40:584(544) ack 776 win 57184 <nop,nop,timestamp 11948634 491719976> 09:40:00.620569 IP 255.255.254.1.ssh > 255.255.254.2.1565: . ack 584 win 33304 <nop,nop,timestamp 491720078 11948634> 09:40:00.627956 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 584:608(24) ack 776 win 57920 <nop,nop,timestamp 11948644 491720078> 09:40:00.727778 IP 255.255.254.1.ssh > 255.255.254.2.1565: . ack 608 win 33304 <nop,nop,timestamp 491720183 11948644> 09:40:00.753739 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 776:1056(280) ack 608 win 33304 <nop,nop,timestamp 491720202 11948644> 09:40:00.847195 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 1056 win 57920 <nop,nop,timestamp 11948667 491720202> 09:40:00.866975 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 608:880(272) ack 1056 win 57920 <nop,nop,timestamp 11948668 491720202> 09:40:00.966562 IP 255.255.254.1.ssh > 255.255.254.2.1565: . ack 880 win 33304 <nop,nop,timestamp 491720422 11948668> 09:40:01.123954 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 1056:2224(1168) ack 880 win 33304 <nop,nop,timestamp 491720579 11948668> 09:40:01.217178 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 2224 win 57920 <nop,nop,timestamp 11948704 491720579> 09:40:03.863875 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 880:896(16) ack 2224 win 57920 <nop,nop,timestamp 11948968 491720579> 09:40:03.967049 IP 255.255.254.1.ssh > 255.255.254.2.1565: . ack 896 win 33304 <nop,nop,timestamp 491723412 11948968> 09:40:03.967597 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 896:944(48) ack 2224 win 57920 <nop,nop,timestamp 11948979 491723412> 09:40:03.969216 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2224:2272(48) ack 944 win 33304 <nop,nop,timestamp 491723414 11948979> 09:40:03.970430 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 944:1008(64) ack 2272 win 57920 <nop,nop,timestamp 11948979 491723414> 09:40:03.982462 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2272:2336(64) ack 1008 win 33304 <nop,nop,timestamp 491723427 11948979> 09:40:03.984466 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 1008:1536(528) ack 2336 win 57920 <nop,nop,timestamp 11948980 491723427> 09:40:04.028809 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2336:2816(480) ack 1536 win 33304 <nop,nop,timestamp 491723473 11948980> 09:40:04.060597 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 1536:2112(576) ack 2816 win 57920 <nop,nop,timestamp 11948988 491723473> 09:40:04.104782 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2816:2848(32) ack 2112 win 33304 <nop,nop,timestamp 491723549 11948988> 09:40:04.106312 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2112:2176(64) ack 2848 win 57920 <nop,nop,timestamp 11948992 491723549> 09:40:04.132479 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2848:2896(48) ack 2176 win 33304 <nop,nop,timestamp 491723577 11948992> 09:40:04.134269 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2176:2560(384) ack 2896 win 57920 <nop,nop,timestamp 11948995 491723577> 09:40:04.152359 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2896:2944(48) ack 2560 win 33304 <nop,nop,timestamp 491723597 11948995> 09:40:04.162486 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 2944:4320(1376) ack 2560 win 33304 <nop,nop,timestamp 491723607 11948995> 09:40:04.164080 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4320 win 56544 <nop,nop,timestamp 11948998 491723597> 09:40:04.925327 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4320:4416(96) ack 2560 win 33304 <nop,nop,timestamp 491724367 11948998> 09:40:04.925396 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4416:4480(64) ack 2560 win 33304 <nop,nop,timestamp 491724367 11948998> 09:40:04.925904 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4480 win 57760 <nop,nop,timestamp 11949074 491724367> 09:40:04.935872 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4480:4544(64) ack 2560 win 33304 <nop,nop,timestamp 491724378 11949074> 09:40:05.027081 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4544 win 57920 <nop,nop,timestamp 11949085 491724378> 09:40:48.766603 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2560:2608(48) ack 4544 win 57920 <nop,nop,timestamp 11953458 491724378> 09:40:48.768701 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4544:4592(48) ack 2608 win 33304 <nop,nop,timestamp 491768033 11953458> 09:40:48.868036 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4592 win 57920 <nop,nop,timestamp 11953469 491768033> 09:40:48.935145 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2608:2656(48) ack 4592 win 57920 <nop,nop,timestamp 11953475 491768033> 09:40:48.936066 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4592:4640(48) ack 2656 win 33304 <nop,nop,timestamp 491768200 11953475> 09:40:49.028134 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4640 win 57920 <nop,nop,timestamp 11953485 491768200> 09:40:49.077229 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2656:2704(48) ack 4640 win 57920 <nop,nop,timestamp 11953489 491768200> 09:40:49.078149 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4640:4688(48) ack 2704 win 33304 <nop,nop,timestamp 491768342 11953489> 09:40:49.177955 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4688 win 57920 <nop,nop,timestamp 11953500 491768342> 09:40:49.193950 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2704:2752(48) ack 4688 win 57920 <nop,nop,timestamp 11953501 491768342> 09:40:49.194933 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4688:4736(48) ack 2752 win 33304 <nop,nop,timestamp 491768459 11953501> 09:40:49.288020 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4736 win 57920 <nop,nop,timestamp 11953511 491768459> 09:40:49.361336 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2752:2800(48) ack 4736 win 57920 <nop,nop,timestamp 11953518 491768459> 09:40:49.367027 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4736:4784(48) ack 2800 win 33304 <nop,nop,timestamp 491768630 11953518> 09:40:49.405998 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4784:4832(48) ack 2800 win 33304 <nop,nop,timestamp 491768669 11953518> 09:40:49.406638 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4832 win 57872 <nop,nop,timestamp 11953522 491768630> 09:40:49.497563 IP 255.255.254.1.ssh > 255.255.254.2.1565: P 4832:4960(128) ack 2800 win 33304 <nop,nop,timestamp 491768760 11953522> 09:40:49.502366 IP 255.255.254.2.1565 > 255.255.254.1.ssh: P 2800:2832(32) ack 4960 win 57920 <nop,nop,timestamp 11953532 491768760> 09:40:49.503259 IP 255.255.254.2.1565 > 255.255.254.1.ssh: F 2832:2832(0) ack 4960 win 57920 <nop,nop,timestamp 11953532 491768760> 09:40:49.503449 IP 255.255.254.1.ssh > 255.255.254.2.1565: . ack 2833 win 33304 <nop,nop,timestamp 491768766 11953532> 09:40:49.507742 IP 255.255.254.1.ssh > 255.255.254.2.1565: F 4960:4960(0) ack 2833 win 33304 <nop,nop,timestamp 491768771 11953532> 09:40:49.508288 IP 255.255.254.2.1565 > 255.255.254.1.ssh: . ack 4961 win 57919 <nop,nop,timestamp 11953533 491768771> > > Large corporations need more than a /8. > > A /48 is that, too... > > Arnt -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@xxxxxxx _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf