Sorry...
Sometimes few topics just slips away and I don't even remember.
Here you can use squid -k reconfigure
It will not restart the squid but will reconfigure and hence will also reconnect to peer. BTW.. I am not sure if it causes loss of ipcache or not.
dear RICKY
i think still you didnt understand my problem
it will start if i restart my squid box same as reconfigure -k
but may be the isp parent will go down after five minutes and it come up after half houre
did i must restart my squid box again
or as u say reconfigure -k after every time my isp cache stop
it stop ten times in 24 hours
and the squid try for the given time and declare it dead after declare dead the isp cache start again but my squid is unable to connect it because it declare it dead
i have to restart my squid box -or squid/stop squid/start
to connect my isp cache