ACK of purge packets

[[e-mail]]

David/Eric,
Maybe the best thing to do is add a "request acknowledgement" flag
in the Purge request packet since an acknowledgement is not always
beneficial?

>Jim,Bruce:
>
>>> Contrast this with a Purge request.  "There is no real need for an
>>> acknowledgement here since we already have to deal with the scenario
>>> in which the purge is never sent because the station that should have
>>> sent the purge crashed."
[...]
>It seems to me that the purge can/will be used to remove cache entries
>that could cause routing loops (in router-router case), or an invalid
>path (in the host-router case), when routing outside the cloud
>changes.  A reliable purge is very important for these cases.
>Therefore I recommend keeping the Purge ack.

-- Russell