[squid-users] ICP is disabled?

Hello,

I have just upgraded one of our Squid 2.7 stable 9 servers to 3.1.4. I
modified the squid.conf file slightly to cater for changes that occurred
in the upgrade. However, in my cache.log file I am getting the message:

  2010/07/19 15:02:09| ICP is disabled! Cannot send ICP request to peer.

This seems to occur every few minutes. I have not modified any ICP
config lines, so I am a bit lost as to why this is happening. Our config
shows:

==========================================================
cache_peer wwwcache1.plymouth.ac.uk sibling 3128 3130 proxy-only
   no-delay no-netdb-exchange
#cache_peer wwwcache2.plymouth.ac.uk sibling 3128 3130 proxy-only
   no-delay no-netdb-exchange
cache_peer wwwcache3.plymouth.ac.uk sibling 3128 3130 proxy-only
   no-delay no-netdb-exchange

acl plym_src_IP src 141.163.0.0/16 10.0.0.0/8 192.168.0.0/16
   172.16.0.0/12

icp_access allow plym_src_IP
icp_access deny all
==========================================================

This worked fine at 2.7, but I cannot see why 3.1 doesn't like it and
says that ICP is disabled. Any ideas?

Thanks,

John.

-- 
John Horne                   Tel: +44 (0)1752 587287
University of Plymouth, UK   Fax: +44 (0)1752 587001