Re: Strange ICP not working problem

From: Henrik Nordstrom <>
Date: Fri, 30 Apr 1999 21:25:00 +0200

Adam Neat wrote:

> we have recently begun rolling out 2.1-pre2 on our devel network.

I hope this is 2.1.PATCH2 and not 2.1.PRE2. PRE releases are unstable
development releases...

Latest stable release is 2.2.STABLE2.

> ICP requests come in from clients and our testing software, but, even though we have the old
> in the squid.conf, the icp_queries never actually make it to the parent cache.

ICP queries are not forwarded to parents (or siblings). Only if a HTTP
request is received then Squid generates a ICP request to it's parents.

> The access log file shows the requests coming in, but it always says NONE for the result.

It says NONE in the hierarchy field, since ICP requests is never

> we've done all the usual mods like ACL and the likes, and direct TCP works (from a browser) but still wont go to the parent/sibling caches.

Try repeating the tests using the client program delivered with Squid.
Most people get confused at first when trying to verify things using a
browser. Also note that the ICP peerings in Squid does not work very
well unless Squid is put under some load, so testing with single
requests are likely to fail.

Henrik Nordstrom
Spare time Squid hacker
Received on Fri Apr 30 1999 - 13:32:16 MDT

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