There was issue with DHCP server, to find the root cause of the issue and find the resolution, we had to do following,
1. Run truss command
# truss -f -v all -r all -w all -o /var/tmp/dhcp.out -p $ALL_QIP_PIDs
2. List qip processes
# ps -ef|grep qip
3. Run snoop
# snoop -o /var/tmp/snoop.cap not port 22
4. reproduce the problem
5. kill both truss and snoop
6. restore the services
1. Run truss command
# truss -f -v all -r all -w all -o /var/tmp/dhcp.out -p $ALL_QIP_PIDs
2. List qip processes
# ps -ef|grep qip
3. Run snoop
# snoop -o /var/tmp/snoop.cap not port 22
4. reproduce the problem
5. kill both truss and snoop
6. restore the services
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