Switch Test Presentation The Outline 1.The concept of ping 2.TCP/IP protocol 3.ICMP 4.Ethereal 5.RFC standard for benchmark

The concept of Ping tool ICMP Type = 8 ICMP Type = 0 A 電腦 B 電腦 A ping B

TCP/IP Structure

TCP/IP Model Application HTTP 、 FTP 、 TELNET 、 SNMP 、 NFS TCP TCP 、 UDP IP IP 、 ICMP 、 ARP 、 RARP Physical Layer ： Ethernet 、 FDDI 、 Token Ring …. Application ： IE 、 Web Server… Protocol ： HTTP 、 FTP…

Application Application  IE Presentation  HTML Session  HTTP TCPTransport  Port Number IPNetwork  IP Address Physical Layer Data Link  MAC Physical  RJ-45 TCP/IP VS. OSI

TCP/IP Stack IE HTML HTTP BB DD RJ45 HTTP GET Response A 電腦 Google Apache/IIS HTML HTTP AA-2C- DD-15- F3-VV Fiber

ICMP Code Type CodeChecksum IdentifierSequence Number OPTIONAL DATA All

ICMP Code TYPE = 3 0 = network unreachable router  router 1 = host unreachable router  DNS 2 = protocol unreachable host  Service 3 = port unreachable host  Port Num 4 = fragmentation needed but impossible router because of 'don't fragment' command  MTU 5 = source route not reachable router  routing

ICMP Code TYPE = 8 - Echo Request sent by: 0 = (no special meaning) host, router TYPE = 0 - Echo Reply sent by: 0 = (no special meaning) host, router

Structure of test environment Switch 16 port Receiver2 Receiver1 Sender (Packet size = in windows and in Linux)

Sender information BACK

Receive packet rule in non-promiscuous mode Broadcast Personal IP

Structure of test environment Simple equation ( ( input_count - output_count ) * 100 ) / input_count A 電腦送出 個封包 (ICMP TYPE=8) B 電腦收到 9500 個封包 (ICMP TYPE=0) Frame loss 數目 = – 9500 = /10000 = 95% Frame loss 定義為降 90% 往下測試為標準 請參照 RFC2544 page RFC2889 page

Reference RFC2544 RFC2889 RFC1242