Only the Cisco Cache Engines connected to a router, which is not a part of the MPLS cloud, are functional. There are some problems with servers limiting the access from individual IP addresses. But they can be solved by an exceptions list containing few dozens of directly accessed servers. Transparent caching has not a significant influence to the hit ratio. What changes dramatically is the requests frequency, which is up to ten times higher.
Savings realized by the transparent caching are also significant.
We believe that our approach to transparent caching is very effective. Of course this solution is not usable everywhere. If this is true in your network, our approach may well appeal to you. Web Cache Communication Protocol. Web Cache Communication Protocol, version 2.