Hi all,

I'm trying to create a very simple configuration here: I have one origin server and I want two peer to be set as siblings. I am facing trouble though. When I launch the squid instances at the two peers, I can't get them to work together: From what I saw in access.log, the siblings are not using ICP queries, and therefore not communicating about their cache content (sometimes, at the beginning of my tests I can see one or two ICP queries (in access.log) between the two peers, then, they just stop talking...).

I've tried with a lot of different files, such as .jpg .mpd .gif. I've had one UDP_HIT (on the requested peer) and SIBLING_HIT (on the requesting peer) once (over all my tests) and that's all, I get HIER_DIRECT for the rest of my tests.
I am using the configuration file depicted below (with the cache_peer directive in the end)

Any idea what's wrong in my config ? I am really struggling with this and can't see what's wrong here >_<

Code:
#	WELCOME TO SQUID 3.3.8 
#	---------------------------- 
# ACCESS CONTROLS 
# ----------------------------------------------------------------------------- 
acl localnet src 10.0.0.0/8	# RFC1918 possible internal network 
acl localnet src 172.16.0.0/12	# RFC1918 possible internal network 
acl localnet src 192.168.0.0/16	# RFC1918 possible internal network 

acl SSL_ports port 443 
acl Safe_ports port 80	 # http 
acl Safe_ports port 21	 # ftp 
acl Safe_ports port 443	 # https 
acl Safe_ports port 70	 # gopher 
acl Safe_ports port 210	 # wais 
acl Safe_ports port 1025-65535	# unregistered ports 
acl Safe_ports port 280	 # http-mgmt 
acl Safe_ports port 488	 # gss-http 
acl Safe_ports port 591	 # filemaker 
acl Safe_ports port 777	 # multiling http 
acl CONNECT method CONNECT 
acl video urlpath_regex -i .m4s$ 

http_access deny !Safe_ports 
http_access deny CONNECT !SSL_ports 
http_access allow localhost manager 
http_access allow localnet 
http_access deny all 

icp_access allow localnet 
icp_access allow localhost 
icp_access deny all 

# NETWORK OPTIONS 
# ----------------------------------------------------------------------------- 
http_port 3128 

# MEMORY CACHE OPTIONS 
# ----------------------------------------------------------------------------- 
cache_mem 256 MB 
maximum_object_size_in_memory 2048 KB 
memory_replacement_policy lru 

# DISK CACHE OPTIONS 
# ----------------------------------------------------------------------------- 
cache_replacement_policy lru 
cache_dir ufs /var/spool/squid3 2000 16 256 
minimum_object_size 0 KB 
maximum_object_size 40960 KB 


# LOGFILE OPTIONS 
# ----------------------------------------------------------------------------- 
access_log /var/log/squid3/access.log squid 
cache_store_log /var/log/squid3/store.log 

# OPTIONS FOR TUNING THE CACHE 
# ----------------------------------------------------------------------------- 

refresh_pattern ^ftp:	 1440	20%	10080 
refresh_pattern ^gopher:	1440	0%	1440 
refresh_pattern -i (/cgi-bin/|\?) 0	0%	0 
refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880 
refresh_pattern .	 0	20%	4320 

refresh_pattern -i .mpd$ 1440 100% 1440 override-expire override-lastmod reload-into-ims ignore-reload ignore-no-cache ignore-private 
range_offset_limit -1 

# ICP OPTIONS 
# ----------------------------------------------------------------------------- 
icp_port 3130 

# OPTIONS INFLUENCING REQUEST FORWARDING 
# ----------------------------------------------------------------------------- 
prefer_direct off 

cache_peer 192.168.2.112 sibling 3128 3130 proxy-only allow-miss