SCTP初始化失败

Question

我有两个虚拟机，都安装了带有通用内核的FreeBSD 10 / i386 /(主机是带有KVM的CentOS 6.5x86-64)

第一个虚拟机名为freetest0，第二个虚拟机名为freetest1

freetest0 = freebsd 10 / i386 /如果是vtnet2 192.168.6.100 freetest1 = freebsd 10 / i386 /如果是vtnet2 192.168.6.110

我想测试一下从freetest到freetest(s)的速度。但是，问题是它们不能通过SCTP连接。TCP和UDP协议都很好。

无论我使用iperf3 (支持SCTP )和netperfmeter，它们都不能通过SCTP连接。

#the server is freetest1
root@freetest1:~ # netstat -an -f inet
Active Internet connections (including servers)
Proto Recv-Q Send-Q Local Address          Foreign Address        (state)
tcp46      0      0 *.9000                 *.*                    LISTEN
tcp4       0      0 192.168.0.110.22       192.168.0.1.39754      ESTABLISHED
tcp4       0      0 192.168.0.110.22       192.168.0.1.39752      ESTABLISHED
tcp4       0      0 127.0.0.1.25           *.*                    LISTEN
tcp4       0      0 *.22                   *.*                    LISTEN
udp46      0      0 *.9000                 *.*                    
udp4       0      0 *.514                  *.*                    
Active SCTP associations (including servers)
Proto  Type  Local Address          Foreign Address        (state)
sctp46 1to1  fe80::5054:ff:fe.9000                         LISTEN
             192.168.8.110.9000     
             fe80::5054:ff:fe.9000  
             192.168.6.110.9000     
             fe80::5054:ff:fe.9000  
             192.168.0.110.9000     
             127.0.0.1.9000         
             fe80::1.9000           
             ::1.9000               
sctp46 1toN  fe80::5054:ff:fe.9001                         LISTEN
             192.168.8.110.9001     
             fe80::5054:ff:fe.9001  
             192.168.6.110.9001     
             fe80::5054:ff:fe.9001  
             192.168.0.110.9001     
             127.0.0.1.9001         
             fe80::1.9001           
             ::1.9001  





root@freetest0:~ # netperfmeter 192.168.6.110:9000
Network Performance Meter - Version 1.0
---------------------------------------

Active Mode:
   - Measurement ID  = 4bc75bae
   - Remote Address  = 192.168.6.110:9000
   - Control Address = 192.168.6.110:9001 - connecting ...

#<cannot get connected>



root@freetest0:~ # tcpdump -i vtnet2
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vtnet2, link-type EN10MB (Ethernet), capture size 65535 bytes
14:11:03.839031 IP 192.168.6.100.55228 > 192.168.6.110.5201: Flags [S], seq 1318388212, win 65535, options [mss 1460,nop,wscale 6,sackOK,TS val 2652085 ecr 0], length 0
14:11:03.868787 IP 192.168.6.110.5201 > 192.168.6.100.55228: Flags [R.], seq 0, ack 1318388213, win 0, length 0
14:11:35.235362 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:38.256378 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:40.256418 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:44.256099 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:52.254442 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025]

root@freetest1:~ # tcpdump -i vtnet2
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vtnet2, link-type EN10MB (Ethernet), capture size 65535 bytes
14:11:35.979349 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:39.000411 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:41.000495 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:45.000116 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 
14:11:52.998491 IP 192.168.6.100.52018 > 192.168.6.110.9001: sctp (1) [INIT] [init tag: 3995201801] [rwnd: 1864135] [OS: 10] [MIS: 2048] [init TSN: 332259025] 

Answer 1

答案是数据包分析后出现校验和错误。