Cache-as-cache-can
steven hessing
stevenh at inet.unisource.nl
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
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