re: [RRG] thoughts on the design space 3: caching

[Xu Xiaohu <xuxh@huawei.com>]

> > Hasn't the industry built caching routers before, and what happened to
> > them? Think we need a second try? I have not seen any ideas on how to
> > remove the problems inherent with the caches, such as vulnerability to
> > being hit by random destination addresses.
> 
> I believe the cache mechanism is still useful. However, it depends on what
> you indeed expect it to do. If you just expect it to optimize the
forwarding
> path for the traffic, it would be OK. If you expect it to forward almost
all
> traffic, it would be doubtable. In other word, is it acceptable for the
> overlay to forward most traffic once the cache becomes unavailable, e.g,
the
> cache is filled up due to some attacks.

By the way, IMO, it also depends on how you use it. For example, a single
(or several) packet(s) can trigger a route entry in the cache, or only those
flows which have reach some rate can trigger a route entry in the cache.

Xiaohu XU



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