ipv6workshoptwing2003

ipv6workshoptwing2003内容摘要：

4:00 +10GMT Mon 02 Jun, 2020 Analysis Summary BGP routing table entries examined: 125504 Prefixes after maximum aggregation: 78740 Unique aggregates announced to Inter: 59216 Total ASes present in the Inter Routing Table: 15264 Originonly ASes present in the Inter Routing Table: 13228 Origin ASes announcing only one prefix: 5992 Transit ASes present in the Inter Routing Table: 2036 Source: /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:18 /9:5 /10:8 /11:13 /12:52 /13:98 /14:254 /15:466 /16:7413 /17:1679 /18:2976 /19:8434 /20:8477 /21:6139 /22:9041 /23:10639 /24:69277 /25:156 /26:206 /27:54 /28:32 /29:21 /30:21 /31:0 /32:25 路由表日益增大 Source: Apnic .熱潮 採用 CIDR 網路泡沫化 IPv6 的優點 • 增大的位址空間 – 128 位元 – (2128 = 340,282,366,920,938,463,463,374,607,431,768,211,456) – 足以分配給地球上每一粒沙 • 階層性位址架構 – 增進位址聚集，減低路由表的大小 • 高效能的標頭 (header)架構 – 提高封包轉送效能 • 自動設定 (autoconfiguration) 機制 • 內建安全性支援 • 較佳的 QoS支援 IPv4與 IPv6的比較 IPv4 IPv6 Address length 32 bits 128 bits IPSec support Optional Required QoS support Some Better Fragmentation Hosts and routers Hosts only Checksum in header Yes No Options in header Yes No (Extension Header) Linklayer address resolution ARP (broadcast) Multicast Neighbor Multicast membership IGMP Multicast Listener Router Discovery Optional Required Uses broadcasts Yes No Configuration Manual, DHCP Automatic,。