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aix:aix_net_testing [2023/09/11 15:57]
manu [Test packet size (MTU)]
aix:aix_net_testing [2023/09/11 16:37] (current)
manu
Line 26: Line 26:
 If packet size are to high, you 'll have a packet lost 100% If packet size are to high, you 'll have a packet lost 100%
 <cli prompt='#'>​ <cli prompt='#'>​
-[root@testh]/​root#​ ping -c2 -w 10 -D -s 1470 nim01+[root@testh]/​root#​ ping -c2 -w 10 -D -s 9000 nim01
 PING nim01.lu (172.10.10.10):​ 1500 data bytes PING nim01.lu (172.10.10.10):​ 1500 data bytes
  
Line 32: Line 32:
 2 packets transmitted,​ 0 packets received, 100% packet loss 2 packets transmitted,​ 0 packets received, 100% packet loss
 </​cli>​ </​cli>​
-  ​+ 
 +Generate network trafic and check the packet size, here packet 1500, on NFS 
 +<cli prompt='#'>​ 
 +[root@testh]/​root#​ tcpdump -i en1 -vvv host myserver.lu 
 +16:​33:​44.209433 IP (tos 0x0, ttl 60, id 20437, offset 0, flags [none], proto TCP (6), length 1500) 
 +    testh.lu.42305 > myserver.lu.shilp:​ Flags [.], cksum 0x0000 (incorrect -> 0xa6bb), seq 495870232:​495871680,​ ack 4016785, win 65535, options [nop,nop,TS val 1698414524 ecr 4145383147],​ length 1448: NFS request xid 0 0 null 
 +16:​33:​44.209438 IP (tos 0x0, ttl 60, id 20438, offset 0, flags [none], proto TCP (6), length 1500) 
 +    testh.lu.42305 > myserver.lu.shilp:​ Flags [.], cksum 0x0000 (incorrect -> 0xa113), seq 495871680:​495873128,​ ack 4016785, win 65535, options [nop,nop,TS val 1698414524 ecr 4145383147],​ length 1448: NFS request xid 0 0 null 
 +16:​33:​44.209445 IP (tos 0x0, ttl 60, id 20439, offset 0, flags [none], proto TCP (6), length 1500) 
 +    testh.lu.42305 > myserver.lu.shilp:​ Flags [.], cksum 0x0000 (incorrect -> 0x9b6b), seq 495873128:​495874576,​ ack 4016785, win 65535, options [nop,nop,TS val 1698414524 ecr 4145383147],​ length 1448: NFS request xid 0 0 null 
 + 
 +29300 packets captured 
 +462059 packets received by filter 
 +432674 packets dropped by kernel 
 +</​cli>​ 
   ​   ​
 ==== Reset count in netstat ==== ==== Reset count in netstat ====
aix/aix_net_testing.1694440646.txt.gz · Last modified: 2023/09/11 15:57 by manu