SNIFFER

Purpose

This report shows information that is written to the SNIFFER data set.

Restriction: Do not use the SNIFFER option when the CTRACE subcommands are used with the IPCS MERGE subcommand. The SNIFFER data file is written over by the multiple CTRACE commands that specify the SNIFFER option.

Format

The following command was used to obtain the example of this report.

ALLOC F(SNIFFER) DATASET(SNIFFER.TRC) LRECL(1600) RECFM(V B) +
REUSE TRACK SPACE(15 15)
 
CTRACE COMP(SYSTCPIS)  DSN('MWS.PQ33208.PTRACE4')+
OPTION((OPT  TALLY SNIFFER NOREASSEMBLY))

COMPONENT TRACE SHORT FORMAT
  SYSNAME(MVS142)
  COMP(SYSTCPIS)
  OPTIONS(( OPT  TALLY SNIFFER(4000) NOREASSEMBLY))
  DSNAME('MWS.PQ33208.PTRACE4')
 PTRPT04I SNIFFER(ETHERNET) option selected
 
 OPTIONS((Both Bootp(67,68) Checksum(Summary) Cleanup(500) Datasize(0)        
 DelayAck(200,200) Domain(53) EE(12000:12004) Finger(79) First Flags(All )   
 Ftp(20,21) Gain(125,250) Gopher(70) Ike(500) Limit(999999999) Gmt           
 Nat(4500) Ntp(123) Option Noreassembly Router(520) Rpc(111) Sasp(3860)      
 Segment Smtp(25) Sniffer(4000,Ethernet) Snmp(161,162) Speed(10,10)          
 Statistics(Detail) Telnet(23,80,) Tftp(69) Time(37) Tod Userexit() Www(80)  
  ))
Sniffer Report                                                                 
  3,385 records written to MWS.SNIFFER.ETH                                     
639,789 bytes written                                                          
   2121 packets were abbreviated                                               
   2024 is the maximum data size                                               
   3375 packets were truncated from 1843 bytes

Following are descriptions for some areas of the example.

108 records written to SNIFFER: This record count includes the two header records and one trailer record that were written to the SNIFFER data set.
46000 bytes written to SNIFFER: The number of data bytes written to the SNIFFER data set. This should be close to the amount of data to be downloaded.
22 records were truncated to 1600 bytes: Because the logical record length was 1,600 bytes, 22 records were truncated. This can be avoided by increasing the logical record length. The maximum logical record length is 32,763 or the size of physical disk blocks, whichever is smaller.
3.385 records written to MWS.SNIFFER.ETH: This record count includes the two header records and one trailer record that were written to the SNIFFER data set.
639,789 bytes written: The number of data bytes written to the SNIFFER data set. This should be the amount of data to be downloaded.
2121 packets were abbreviated: The number of packets that were abbreviated when the trace data was collected.
2024 is the maximum data size: The size of the largest record written to the SNIFFER data set.
3375 packets were truncated from 1843 bytes: Because the logical record length was 2,048 bytes, 3375 records were truncated. This can be avoided by increasing the logical record length. The maximum logical record length is 32,763 or the size of physical disk blocks, whichever is smaller.