Cache-as-cache-can

Tue Nov 17 12:00:16 UTC 1998

There seem to be three solutions for transparent web-caching:
1 a web-cache between two routers, all traffic is routed through it.
2 a l4 switch between two routers, all traffic is routed through it.
The l4 switch redirects web-requests to a www-cache.
3 a web-cache connected to a router which uses policy routing to
direct web-requests to it.

1 is extremely ugly and impossible at high traffic levels
2 is an extra device in your network which needs to be managed
and is often difficult to implement in a WAN environment (our
core routers don't have (fast-)ethernet interfaces.)
3 is the preferred solution but you need to run 11.3 or 12.0 for
it. These software versions support fast-switched policy routing.
Most ISPs currently rely on 11.1CC features and thus can not upgrade
to 11.3. The wait is thus for a stable release of 12.0.

-- Steven 

In your mail from 17-11-1998 you write:
> In article <19981117091400.D9778 at skriver.dk>,
> 	Jesper Skriver <jesper at skriver.dk> wrote;
> 
> } Why use things like this, use a default route to a HSRP address ...
> 
> That could be.  But they (appliance venders) haven't shown
> it at this point, afaik.  They simply shows a veiw of cache
> appliance and l4 switch sitting between 2 routers.  Why?
> -- 
> Katsuhiro Kondou