6 1. VSphere Network 1.1 Virtual Network OSI model NSX支持L2-L7 Application End User layer Http, Ftp, ssH, Dns Presentation Syntax layer SSL, SSH, IMAP, FTP Session APIs, Sockets. Win Sock Transport End-to-End connections TCP, UDP Network IP, ICMP. IPsec IGMP Data link Frames Ethernet, PPP, Switches, Bridges ysical Coax Fibre, Metalic Repeaters, Hubs 可南中医药大学/阮晓龙/13938213680/htp// cloud xg. hactcm. edu.cn/htp/ww5 ucweb.cn
河南中医药大学 / 阮晓龙 / 13938213680 / http://cloud.xg.hactcm.edu.cn / http://www.51xueweb.cn 1.vSphere Network 6 1.1 Virtual Network OSI model ◼ NSX支持L2 - L7
1. VSphere Network 1.1 Virtual Network 口封装与解封装( Encapsulation and de-encapsulation) ■通过网络传输的信息必须在通信的发送和接收端进行转换过程。 ■转换过程是封装和接封装。这一点在《计算机网络原理》课程中已经充分介绍。 在软件定义的网络中,使用wan。 XLAN Encapulated Frame Inner Ethernet Frame 8 bytes Outer Ethernet Outer IP Header Outer UDP Header VXLAN Header Inner DST MAC Inner SRC MAC 802. 1Q Ether Type Inner 802 therTyper Original Payload IP Header Header IP Protoco:Checksum Outer SRC IP Outer DST护P VXLAN Flags Reserved VXLAN NI Reserverd SRC Port DST Port UDP Length UDP Checksum Outer DST MAC 802.10 Outer 802.1Q Ether Ether Typer
河南中医药大学 / 阮晓龙 / 13938213680 / http://cloud.xg.hactcm.edu.cn / http://www.51xueweb.cn 1.vSphere Network 7 1.1 Virtual Network 封装与解封装(Encapsulation and de-encapsulation) ◼ 通过网络传输的信息必须在通信的发送和接收端进行转换过程。 ◼ 转换过程是封装和接封装。这一点在《计算机网络原理》课程中已经充分介绍。 ◼ 在软件定义的网络中,使用vxlan
8 1. VSphere Network 1.1 Virtual Network 口MAC转发表与自学习协议( MAC tables and MAC learning process 物理交换机使用MAC转发表来执行帧转发 物理交换机通过自学习协议来构建MAC转发表。 ■地址解析协议(ARP)可以发现与已知P地址相对应的MAC地址,以便允许 构建第2层数据包。 在 VMware ESXi中,查看ARP的命令是: tcpdump-uw arp 可南中医药大学/阮晓龙/13938213680/htp// cloud xg. hactcm. edu.cn/htp/ww5 ucweb.cn
河南中医药大学 / 阮晓龙 / 13938213680 / http://cloud.xg.hactcm.edu.cn / http://www.51xueweb.cn 1.vSphere Network MAC转发表与自学习协议(MAC tables and MAC learning process) ◼ 物理交换机使用MAC转发表来执行帧转发。 ◼ 物理交换机通过自学习协议来构建MAC转发表。 ◼ 地址解析协议(ARP)可以发现与已知IP地址相对应的MAC地址,以便允许 构建第2层数据包。 ◼ 在VMware ESXi中,查看ARP的命令是:tcpdump-uw arp 8 1.1 Virtual Network
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0 1. VSphere Network 1.1 Virtual Network MTU (Maximum Transmission Unit 根据lEE802.3规范,有效的以太网帧大小为64到1518字节,有效载荷从46到1500字节。 目前已经基于标准开发了不同的E标准,支持扩展以太网帧 口 VLAN tagging(80210 This is with an additional four bytes in the Ethernet header o Provider Bridge(PB)802.lad This is with an additional eight bytes to the original frame to support service and customer tagging These have an MTU of 2, 500 bytes o Multiprotocol Label Switching(MPLS) This increases the maximum Ethernet frame size to 1, 518 bytes +(n* 4 bytes), where n is the number of stacked labels ∨XLAN o Jumbo frames These are Ethernet frames with more than 1, 500 bytes of payload, typically around 9,000 bytes. They are mostly used for IP-based storage traffic 可南中医药大学/阮晓龙/13938213680/htp// cloud xg. hactcm. edu.cn/htp/ww5 ucweb.cn
河南中医药大学 / 阮晓龙 / 13938213680 / http://cloud.xg.hactcm.edu.cn / http://www.51xueweb.cn 1.vSphere Network MTU(Maximum Transmission Unit) ◼ 根据IEEE802.3规范,有效的以太网帧大小为64到1518字节,有效载荷从46到1500字节。 ◼ 目前已经基于标准开发了不同的IEEE标准,支持扩展以太网帧。 VLAN tagging (802.1Q) ▪ This is with an additional four bytes in the Ethernet header. Provider Bridge (PB) 802.1ad: ▪ This is with an additional eight bytes to the original frame to support service and customer tagging. FCoE frames: ▪ These have an MTU of 2,500 bytes. Multiprotocol Label Switching (MPLS): ▪ This increases the maximum Ethernet frame size to 1,518 bytes + (n * 4 bytes), where n is the number of stacked labels. VXLAN: ▪ This adds another 50 bytes. Jumbo frames: ▪ These are Ethernet frames with more than 1,500 bytes of payload, typically around 9,000 bytes. They are mostly used for IP-based storage traffic. 10 1.1 Virtual Network