Re: [squid-users] Squid, virtual IP and Layer 7 switching...any idea?

On Thu, 17 Feb 2005, Marco Crucianelli wrote:

> Well, maybe I was not that clear in my explanation (my english fault! :

I do think I understood your question proper.

If you are using a layer 7 switch then there is NO specific changes needed
to squid.conf to make things work proper. Just configure each Squid server
as you would normally configure this Squid server.

> something like this! That's why I was asking if I should modify
> udp_incoming_address and udp_outgoing_address!

You should not.

> But I have another doubt too: those two directives (udp_incoming_address
> and udp_outgoing_address) change the ip address that squid uses to make
> ICP queries, what happens after squid has queried using ICP, I mean,
> what address does it use to retrieve the content it needs from the
> parent_squid?

Normally the IP address of the server where it runs, which in nearly all
cases is what you want.

> Does it use the virtual IP address or the real one?

This is up to your OS configuration, but in nearly all cases involving
layer 7 switches the OS will never use the virtual IP for anything except
accepting traffic via the layer 7 switch, and this is what you want.

You can ask squid to hint to the OS what address to use by the
tcp_outgoing_address directive, but you should only use this if your
situation requires you to. Only the fact that you use a layer 7 switch
practically never requires you to use this directive.

Regards
Henrik
Received on Sat Feb 19 2005 - 07:54:39 MST