A fix is available
APAR status
Closed as program error.
Error description
IPTRACE incorrectly removes the TAP created by another application. This causes the other application to stop receiving packets or no response. In this case, the problem was seen if iptrace was started and stopped when IBM Load Balancer is run on AIX. When iptrace stops it removes the TAP created by Load balancer and it stops receiving packets delivered to that host. The problem can also been seen if tcpdump and iptrace are run together on the same AIX. 1) Start tcpdump 2) Start iptrace 3) Stop iptrace 4) tcpdump will stop sniffing packets on the host.
Local fix
Run, # iptrace -u several times until iptrace unloaded messages are seen Restart the tcpdump or application (load balancer). Do not use iptrace with tcpdump or load balancer.
Problem summary
tcpdump or any other packet sniffing applications will stop receiving packets, if iptrace is started and stopped.
Problem conclusion
iptrace code is modified to retain any existing filters that were added by other packet sniffing applications.
Temporary fix
Comments
APAR Information
APAR number
IV63301
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2014-08-06
Closed date
2014-08-06
Last modified date
2016-05-11
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX V7.1
Fixed component ID
5765H4000
Applicable component levels
R710 PSY U861791
UP15/11/23 I 1000
PTF to Fileset Mapping
U861791 bos.net.tcp.server 7.1.4.0
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Document Information
Modified date:
11 May 2016